Mirvac MMC Study

Executive Summary

The diagnosis, the routes assessed, the recommended Phase 2 pathway, and what Mirvac provides for Phase 2 to run.

The diagnosis

Australian construction multifactor productivity has declined 1.6 per cent since 1990 while the broader economy has gained 35.2 per cent in multifactor productivity over the same period. Residential physical productivity has dropped approximately 53 per cent across 30 years, half as many homes per hour worked as in 1995. (Oxford Economics / ACA 2023; Productivity Commission, February 2025.) For a Tier 1 residential developer that sources programme certainty from the contractor market, this is the structural condition every Modern Methods of Construction option sits inside.

The five routes

Five Modern Methods of Construction routes were assessed against Mirvac's apartment delivery context.

• Route 1. Volumetric Modular.
• Route 2. Kit of Parts structural.
• Route 3. Bathroom and Kitchen Pods.
• Route 4. Multi-Service Risers.
• Route 5. Panelised or Unitised Facades.

All five are viable at the route level, with materially different commercial profiles, compliance pathways, and supply chain maturity in the Australian market. The Phase 2 recommendation pathway is the Hybrid Stack, Routes 2 to 5 in combination on a single LIV Mirvac tower, with Route 1 held as the comparison option on the same project.

The Phase 2 ask

Mirvac chooses between a diagnostic-grade Phase 2 (recommended) and a rapid-comparison Phase 2. Project Innovator recommends diagnostic-grade and will deliver either. The smaller scope sits inside the engagement letter as a contingency, not as a parallel published offer.

Diagnostic-grade Phase 2. Recommended. The full evaluation of the five Modern Methods of Construction routes against the case study project, plus the IRM five pillar assessment of where Mirvac currently sits across Pillars 1 through 4 on the case study project, plus the Traditional Construction Baseline as a parallel Stream 2 deliverable using Mirvac's own historical project data as the benchmark. The IRM five pillar assessment provides the productivity scaffold for both the MMC option scoring and the baseline. The baseline is what makes the Phase 2 option scores defensible inside Mirvac's IC papers. Without it, the comparison rests on industry averages and published ranges. With it, the comparison rests on Mirvac's own delivery record.

Rapid-comparison Phase 2. Contingency. A direct evaluation of the five Modern Methods of Construction routes against the case study project. Scored shortlist, supplier engagement, compliance pathway confirmation, and option-by-option commercial and sustainability assessment. The option comparison is benchmarked against industry ranges and published evidence, not against Mirvac's measured BAU performance. This scope is held in the engagement letter as a contingency if Mirvac's timeline or project conditions make the diagnostic-grade scope unworkable in the available window.

From Mirvac, both shapes require confirmation of the Phase 2 kick-off date, the case study project on which the Phase 2 evaluation runs, and the baseline data inputs named in Section 12 Stream 1. The diagnostic-grade shape requires additional access to Mirvac's recent tower delivery data and to the senior leaders and project teams whose operating disciplines the five pillar assessment reviews.

Why now is structural, not cyclical

Australian construction productivity has gone backwards for thirty years while every other industry moved forward. This is the structural environment Mirvac operates inside.

These figures are not cyclical movement. They are the trend. Construction's structural deterioration has accumulated for thirty years across both the broad sector measure and the residential physical measure.

What the trend has cost

• Construction is 27 per cent of all Australian corporate insolvencies, against a sector that represents approximately 8 per cent of GDP. (ASIC Insolvency Statistics, 2024.)
• Over 3,500 construction companies entered external administration in the most recent quarter. The rate is the highest in a decade. (ASIC, 2024 Q1.)
• Forty eight per cent of all construction rework is caused by poor data and miscommunication, not poor workmanship or bad subcontractors. (FMI and PlanGrid, Construction Disconnected, 2018, n equals 599.)
• Construction professionals in Australia and New Zealand spend 33 per cent of their working week, 11.5 hours, on non productive activities, hunting project information, resolving conflicts, and managing rework. (FMI and PlanGrid, Construction Disconnected, ANZ Edition, 2018, n equals 80.)
• Mid tier and residential builder net margins sit at 1 to 3 per cent. (Master Builders Australia, National Forecasts 2023.)
• At 0.39 per cent of contract value, rework erases 28 per cent of project margin. The figure is from a seven year longitudinal study of one Australian contractor's 19,605 rework events across 346 real projects. (Love et al., 2018, Production Planning and Control, 29 (13).)
• Fewer than half of all construction projects globally are delivered on time. (KPMG International, Global Construction Survey 2023.)

The Farmer verdict applies to Australia

In 2016 the United Kingdom Government commissioned Mark Farmer to review the construction industry's labour model. The report, Modernise or Die, described construction as a sick patient facing inexorable decline unless it changed how it built. The diagnosis was not metaphorical. Farmer documented the same structural productivity failure pattern across the major English speaking construction markets.

Farmer was subsequently asked whether the same diagnosis applied to Australia. He answered, 'All of these things I see in UK and Australia.' (FuturePlace interview, public domain.)

The Australian Productivity Commission's February 2025 report confirms the pattern. The Commission identifies four root causes specific to the Australian context, fragmented industry structure dominated by small subcontractors with no capital to invest in systems, procurement models that push risk to trades rather than incentivising innovation, regulatory complexity from state by state National Construction Code interpretation differences, and an apprenticeship system that builds craft skills rather than systems thinking.

This is the environment Mirvac operates inside. The diagnosis is structural, the data is current, the trend is thirty years deep.

What changes the trajectory

The McKinsey trilogy, Reinventing Construction (2017), Modular Construction, From Projects to Products (2019) and The Next Normal in Construction (2020), identifies industrialisation as the structural intervention most likely to shift the trajectory. The 2017 report sized the global productivity opportunity at approximately 1.6 trillion US dollars annually, a 35 to 40 per cent productivity uplift if the sector matched the average of all other industries.

The 2019 report narrowed the lens to volumetric and modular approaches. Cost reduction of 20 per cent and programme reduction of up to 50 per cent are achievable in sectors with high design repetition. The gains depend on three preconditions, sufficient design repetition to amortise tooling costs, demand aggregation to factory utilisation above 70 per cent, and client acceptance of standardised outputs. Without these conditions, modular does not outperform traditional delivery.

The 2020 report projects that contractors who industrialise their delivery model will generate two to three times greater EBITDA margins than those who remain project by project.

The Australian Productivity Commission concurs that industrialisation is the structural intervention required, with the caveat that it requires demand aggregation at a scale currently absent from the local market.

What this report addresses

Mirvac has asked Project Innovator to review the available Modern Methods of Construction options applicable to the four residential sectors of Build to Rent, Build to Sell, Affordable Housing and Student Accommodation. The brief sits inside the structural diagnosis above.

This report does three things. It evaluates the available Modern Methods of Construction routes against Mirvac's apartment delivery context. It places those routes inside the Innovation Road Map five pillar lens, which sequences Leadership, Data Systems, Lean Construction, Artificial Intelligence and Modern Methods of Construction in that order. And it sets out a recommendation, three options, and the inputs Mirvac will need so Phase 2 can run on Tower 12.

The methodology has evolved since the original Phase 1 was delivered in November 2025. The evolution is the application of the Innovation Road Map five pillar lens, the Lean Construction production discipline frame, and the Manual Data Tax diagnostic. These are not new concepts written for this engagement. They are the toolkit Project Innovator now uses across mid tier and Tier 1 advisory work. Mirvac is receiving the current version, not the original Phase 1 version, because that is what the practice now stands behind.

The diagnosis above gives the report its structural justification. Every section that follows answers a sub question raised by the diagnosis. The data is current. The framing is operator led. The recommendation is one a builder would make to a developer who is paying attention.

Operator perspective

Adam Strong is the practitioner behind this report. The work draws on direct delivery of Modern Methods of Construction and kit of parts apartment projects at scale, and on the supply chain depth that comes from sourcing both onshore and offshore.

Project Innovator is a productivity advisory practice for the Australian construction sector. Adam is the founder and lead practitioner. Twenty eight years in the industry. The advisory is operator led, drawing on direct delivery of apartment projects, offsite manufacturing run at scale, and the development of patented structural systems for industrialised delivery.

What is behind the voice

What worked at $270 million. Adam joined Strongbuild in 2010. The business was a New South Wales south coast construction company. By 2017 it had grown to 270 million dollars in turnover with 150 people, self funded through reinvested profit, delivering some of Australia's largest and most complex engineered timber housing projects at the time. The operating model was built around production discipline. Three dimensional Building Information Modelling at Level of Detail 400, in house, modelled and federated. Every panel barcode tracked, with each barcode linking the panel to its cost code, its programme activity, its safety hold points, its quality sign offs and its compliance traceability. An 8,000 square metre offsite manufacturing facility at Bella Vista, New South Wales, running kit of parts production at scale. Seventy per cent Early Contractor Involvement win rate. Zero Class 1 safety incidents over the peak years. The shift into Modern Methods of Construction, Design for Manufacture and Assembly, and offsite manufacturing was led because they delivered the quality consistency and production control that conventional site based construction could not sustain at scale.

What gaps contributed to the failure. Strongbuild entered administration in 2018 following an external liquidity event. The cause was structural, not operational. The construction industry has no safety net for capital intensive growth that combines manufacturing infrastructure with fast moving project revenue. The 2018 administration was the consequence of an external liquidity event the business had not built a buffer against. The weight carried with that outcome is real. 150 people lost jobs, projects stopped, subcontractors went unpaid. The methodology now incorporates financial resilience and risk systems alongside the digital and production disciplines that worked, because no operating model is complete without them.

What the rebuild proved was solvable. Adam founded Viridi Group in 2019. The new business reached 60 million dollars in turnover in under three years with 50 staff. The proprietary StrongFloor structural system was patented during this period, engineered for offsite manufacture and rapid on site installation. A structural wall system was developed alongside, designed for industrial production and simplified site assembly. The delivery portfolio included schools, defence accommodation and emergency housing. The Viridi work is the proof that the operating model was sound and that proprietary structural solutions can be developed, certified and deployed at scale where the supply chain does not already carry a fit for purpose option.

What this means for Mirvac

Mirvac is already industrialising across the full Modern Methods of Construction stack.

• 442 apartments at Nine delivered with 760 bathroom pods.
• More than 200 homes delivered with prefabricated structural walls and floors across New South Wales and Victoria.
• LIV Build to Rent Fund pipeline at scale, with Build to Rent platform value of approximately 1.7 billion dollars after the December 2025 Australian Retirement Trust transaction.
• Most recently, a landmark volumetric trial at Cobbitty in south-west Sydney, a five-bedroom factory-built family home craned into place from transported modules and erected in hours rather than weeks. Stuart Penklis, speaking for Mirvac, framed the trial as a directional read on where home construction is heading. The NSW Planning Minister attended the site, citing it as visually indistinguishable in design and quality from a conventionally built home next door, and the NSW Government introduced supporting legislation the same week to streamline approvals for modular delivery. (7News, Mirvac launches landmark trial building modular homes in record time, 11 May 2026.)

The Cobbitty trial is the most current public marker that Mirvac has crossed from prefabricated and panelised delivery, where it already has a deep operational base, into volumetric modular at the residential typology. This advisory does not introduce Modern Methods of Construction to Mirvac. It applies a practitioner's read to the next step, which is sequencing the apartment delivery work into the same industrialised trajectory the Cobbitty trial demonstrates for the lower-rise typology.

The analytical frame is the Innovation Road Map, a five pillar lens covering Leadership and Culture, Data Systems and Digital Integration, Lean Construction, Artificial Intelligence and Automation, and Modern Methods of Construction. The production discipline framework is LeanGate. Both are applied to the Mirvac question in Sections 4 onward. The recommendation in Section 11 names the two or three options worth testing on Tower 12 (or other case study), with the reasoning a project review would produce.

Applying the Innovation Road Map

The Mirvac brief asks for an assessment of Modern Methods of Construction options. The driver behind the brief is productivity improvement. This section places the brief inside the wider productivity question.

The lens applied to the brief

Modern Methods of Construction is the visible expression of the productivity drive. It is also Pillar Five of the Innovation Road Map.

The pillars beneath it carry two considerations. The first is that the largest near term productivity improvements in a Tier 1 residential business sit in Pillars One through Four, not in Pillar Five. The second is that the commercial case for Pillar Five depends on Pillars One through Four being in place. The five pillars work together or none of them deliver their full case.

The five pillar lens

The Innovation Road Map is the productivity assessment framework Project Innovator applies across mid tier and Tier 1 construction advisory. The pillars in order are Leadership and Culture, Data Systems and Digital Integration, Lean Construction, Artificial Intelligence and Automation, and Modern Methods of Construction. The order is the methodology's central claim. The sequence is empirical, drawn from where productivity capacity actually sits inside a typical residential builder, and from where the commercial case for Modern Methods of Construction has succeeded or failed in delivery.

Why Modern Methods of Construction is the fifth pillar

The order is locked. The reason is empirical, not theoretical.

Three of the United Kingdom's largest volumetric modular manufacturers entered administration between 2022 and 2024. Caledonian Modular, Ilke Homes, and Urban Splash Modular. Combined investor capital across the three businesses exceeded 200 million pounds. Combined factory floor area exceeded 100,000 square metres. All three had strong manufacturing technology. All three had adequate capital at point of entry. All three had real demand signals from government and private clients. All three failed.

The failure mode was not the manufacturing. The manufacturing was working. The failure was demand aggregation. Factory economics require twelve to eighteen months of pipeline visibility forward in order to maintain factory utilisation above the 70 per cent breakeven that McKinsey identifies for modular projects. UK construction pipelines, like Australian construction pipelines, run at three to six months of pipeline visibility. The structural mismatch between factory economics and construction pipeline economics is a Pillar Two and Pillar Three problem, not a Pillar Five problem.

Pillar Two is what aggregates the demand. Builders and developers who can see their forward pipeline cleanly across estimating, sales, procurement and project systems can commit volume to a manufacturer. Builders and developers who cannot see their own pipeline clearly across those systems cannot make the volume commitment, and the manufacturer's factory utilisation collapses.

Pillar Three is what holds the demand stable. A Last Planner System operating at full implementation can hold a factory order book at a steady rate, because production discipline carries through from programme planning into actual site sequencing. Without Lean Construction in place, demand goes lumpy. Lumpy demand kills factory economics regardless of how good the factory is.

The Australian Productivity Commission's February 2025 report on construction sector productivity confirms the same pattern from the Australian side. Industrialisation is identified as the structural intervention most likely to shift the trajectory of Australian construction productivity, with the caveat that it requires demand aggregation at a scale currently absent from the local market. Demand aggregation is Pillar Two and Pillar Three. The intervention that fails most often is the intervention attempted in isolation from the pillars that condition it.

The productivity argument summarised

The pillars deliver productivity in different orders of magnitude depending on the starting state. For a typical mid tier residential builder, the productivity capacity recoverable across Pillars Two and Three alone (data system integration plus Lean Construction discipline) often exceeds the productivity uplift available from a Modern Methods of Construction shift in isolation. This is because the foundation pillars address the operating cost base, while the Modern Methods of Construction shift addresses a project delivery method that compounds on top of the operating cost base.

For a Tier 1 residential business already advanced on Pillar Five, the productivity argument inverts. The Modern Methods of Construction operating capability is in place. The question becomes how Pillars One through Four compound that capability into the commercial outcome it is capable of producing. The pillars that have not yet been examined to the same depth as Modern Methods of Construction are where the next productivity uplift is most likely to sit.

The five pillars are therefore not a sequenced rollout plan for an organisation starting from zero. They are a diagnostic framework for understanding where the productivity capacity actually sits inside a given business at a given moment.

Applied to Tower 12 (or other case study)

Mirvac is advanced on Pillar Five already. The 442 apartments at Nine with 760 prefabricated bathrooms, the more than 200 homes delivered with prefabricated structural walls and floors across New South Wales and Victoria, the LIV Build to Rent Fund pipeline at scale, all confirm that the operational direction has been set and the strategic capability is real.

The strategic question for the case study project is therefore not whether to industrialise. It is what route to take, at what depth, with what supply chain, and what the surrounding Pillar Two and Pillar Three capability gives the project on cost certainty and programme reliability. The decision is a multi pillar decision.

This is the lens applied through the rest of the report. Section 5 evaluates the five Modern Methods of Construction routes for apartments against the case study project, building on the Design for Manufacture and Assembly framework established in Phase 1. Section 6 places those routes against Mirvac's four housing types of Build to Rent, Build to Sell, Affordable Housing and Student Accommodation. Section 7 reads where capital and capacity are moving in the Australian supply chain, including the implications of the Built Living project entering the market at scale. Section 8 names the three strategic decisions the case study project hinges on, compliance pathway, commercial framework, and offshore versus onshore supply chain. The evaluation rubric and supplier matrix introduced in Phase 1 are extended and deepened in the appendices. Section 11 names the recommendation, narrowed to the two or three options worth testing on the case study project.

The five MMC routes for apartments

Volumetric Modular, Kit of Parts, Pods, Multi Service Risers, Panelised and Unitised Facades. Per route, what it is, where it fits, who is delivering it, what it costs.

Modern Methods of Construction applied to Australian apartment delivery resolves into five discrete routes. Each route has a different manufacturing depth, a different commercial profile, a different supply chain, and a different ceiling on the proportion of construction value it can move from site into a controlled factory environment. Understanding the five routes separately is the prerequisite for the suitability analysis in Section 6 and the recommendation in Section 11.

Pre-Manufactured Value is used as the primary measure of manufacturing depth throughout this section. Pre-Manufactured Value is the proportion of completed project value derived from pre-manufactured elements, expressed as a percentage of total build cost. (Cast Consultancy, Pre-Manufactured Value as a Measure of Construction Innovation, March 2021.) The Australian operator ranges used below are directional, derived from delivered projects and supply chain assessments. No peer-reviewed Australian dataset for Pre-Manufactured Value at scale currently exists.

The assessment draws on verified project evidence from the Phase 1 research base, supplier capacity data from Project Innovator's market review, and direct delivery experience from Strongbuild and Viridi across apartment towers, kit of parts panel systems, and bathroom pod integration at scale.

Combined as hybrid stacks

The five routes are not mutually exclusive. The hybrid stack that delivers the best commercial case for a Mirvac apartment project without requiring the full volumetric modular commitment combines Routes 2, 3, 4, and 5. The stack uses a steel or precast Kit of Parts structural frame, bathroom and kitchen pods, multi-service risers, and a panelised non-combustible facade. This stack achieves a Pre-Manufactured Value range of 35 to 55 per cent against a baseline of approximately 3 to 10 per cent for traditional delivery, without the 18 to 24 month whole-of-apartment design freeze that full volumetric modular requires. The design freeze in the hybrid stack is structural and wet area only. The supply chain for all four routes has confirmed Australian production capacity.

Route 1, full volumetric modular, is the option for a contained pilot on a single tower with high design repetition and the forward pipeline a Build to Rent fund structure provides. Route 2, Kit of Parts with a mass timber element, introduces the strongest verified embodied carbon case for projects where sustainability is a genuine programme requirement. For all other Mirvac project types, steel frame Kit of Parts is the primary structural option within the hybrid stack.

Suitability by housing type

Build to Rent, Build to Sell, Affordable Housing, Student Accommodation, separated as the brief asked. Four by four fit matrix.

The five routes examined in Section 5 do not fit every housing type with equal force. The suitability depends on three variables specific to each housing type. The first is the design repetition available to satisfy factory economics. The second is the programme value, meaning what a shorter delivery schedule is worth in the revenue model of that particular tenure. The third is the design standardisation tolerance, meaning how much the client and the market will accept product consistency in exchange for cost and programme benefit.

The matrix below places four MMC families against the four housing types Mirvac's brief identified. The four families are Full Volumetric Module in Construction, Hybrid Stack combining pods with pre-fabricated risers and non-combustible facade, Pods Only as the lowest-commitment entry point, and Mass Timber Kit of Parts as the structural specialisation route. The matrix consolidates the commercial and compliance profiles from Section 5 and adds the tenure-specific drivers.

Build to Rent, the Year 15 exit lens

A question common to BtR fund sponsors is whether volumetric modular construction affects the asset's residual value at exit. The operator assessment is that it does not, for a well-designed BtR asset. BtR assets are valued on yield, not on construction method. The manufactured element is not visible in the valuation. The programme saving that brought the asset to income six months earlier, and the quality consistency that has held down maintenance cost over the hold period, are both embedded in the asset's operating performance record at the time of exit. For a Year 15 sale, the relevant evidence is the tenancy performance, the maintenance cost trajectory, and the occupancy rate. The construction method is disclosed in the building file and is a matter of record. It is not a valuation variable.

Design standardisation and the product differentiation tension

The strongest tension in the matrix sits in the Build to Sell row. Full volumetric modular requires design standardisation across a significant proportion of the apartment configurations. BtS markets use configuration variety to achieve price stratification. The resolution, as delivered at Nine by Mirvac with 16 pod configurations across 769 pods, is to standardise the manufactured element (wet areas) while retaining flexibility in the living and bedroom configuration. The constraint is binding on the manufactured element, not on the whole apartment. This is the discipline the detailed design process must carry from Phase 2 onward.

Where capital is flowing in Australian MMC

Australian Modern Methods of Construction has moved from fringe to strategic in a single year. The supply side is being institutionalised at scale, government procurement frameworks are formalising, and the financing infrastructure that has historically blocked offsite delivery is opening.

This section names the moves, the implications for Tower 12 (or other case study) and the Build to Rent platform, and the position Mirvac is in to shape the next stage rather than respond to it.

The Built Living signal

On 4 May 2026 Wesfarmers Limited (ASX:WES) announced the formation of Built Living, a 50:50 joint venture with Built Group. Wesfarmers' initial equity commitment is 100 million dollars. The Neerabup Automation and Robotics Precinct facility outside Perth is valued at 250 million dollars total project capital.

The joint venture's stated methodology is Design for Manufacture and Assembly of modular and precast concrete components for medium and high rise residential. The international reference models cited are the Netherlands, Germany and Finland. Built Group has invested 100 million dollars in artificial intelligence enabled digital product capability that integrates with the manufacturing platform.

The leadership signal is precise. Dale Connor, formerly Chief Operating Officer at Lendlease, is the inaugural Chief Executive Officer. Built Group's executive chairman Marco Rossi and Wesfarmers Managing Director Rob Scott sit on the joint venture. Scott's public statement framed the rationale directly. 'Australia urgently needs more housing, and the Built Living joint venture is well positioned to address that need using internationally proven construction models.' (Source, Wesfarmers ASX media release, 4 May 2026; The Urban Developer, 5 May 2026.)

The Wesfarmers playbook

Wesfarmers' history is the context that makes the Built Living move legible. The pattern is methodical entry into adjacent supply markets that surround a structural demand thesis.

In 1994 Wesfarmers acquired Bunnings for 185 million dollars, entering retail building materials. Between 2001 and 2007 Bunnings expanded into New Zealand and the United Kingdom and Ireland, taking retail building supply to continental scale. Across 2024 and 2026 the group consolidated industrial and workwear supply through Workwear Group, Blackwoods, Bullivants and Coregas. In 2026 the group entered residential construction supply at factory scale through Built Living.

On 11 May 2026 Mirvac trialled a five-bedroom volumetric modular home at Cobbitty in south-west Sydney, with NSW Government legislation introduced the same week to streamline modular approvals. The trial is the most current public signal that the Tier 1 demand-anchor position is shifting from prefabricated and panelised delivery toward volumetric at the residential typology. (7News, Mirvac launches landmark trial building modular homes in record time, 11 May 2026.)

Capacity scaling in parallel

Built Living is the anchor but not the only signal.

Modscape and Modbotics confirmed in May 2026 a 50,000 square metre manufacturing facility at Yatala on the Gold Coast. Construction commences July 2026. Operations begin mid 2027. The facility serves Queensland and northern New South Wales. Combined with Modscape's existing 20,000 square metre Essendon Fields facility, total capacity reaches 2,500 volumetric modules per year. Verified delivery pipeline includes 490 social and affordable apartments at Woree, Cairns (245 social, 223 affordable, 22 specialist disability accommodation), targeted for completion end 2026, and a Queensland Government QBuild contract for 122 homes across 45 sites on a 25 day production cycle. (builtoffsite.com.au, May 2026; modscape.com.au, accessed May 2026; Cairns Regional Council, 2025.)

Saltair Modular operates 1,800 modules per year across four facilities in Queensland (Coolum 1 at 10,600 square metres, Coolum 2 at 10,000 square metres, Crestmead at 16,500 square metres). The business has won the Housing Industry Association Innovation in Housing Award for five consecutive years. (prefabaus.org.au, accessed May 2026.)

JMB Modular Buildings opened its Advanced Manufacturing Centre 1 at Shepparton, Victoria, in January 2025. The facility runs an 8 station moving production line, 121 metres long, with modules leaving move in ready after 40 days of construction. Production target is 200 modules per year with 64 employees. The 2025 Victorian Housing Industry Association Modular and Prefabricated Housing Award recognises the production system. (builtoffsite.com.au, 2025.)

Government and finance enablers

The supply side scaling is matched by the framework moves.

The New South Wales Modern Methods of Construction Procurement List (SCM5862) opened in May 2024 and runs through 1 May 2027. As of March 2025 twenty eight suppliers are registered. The list covers volumetric, kit of parts, additive manufacturing and non structural prefabricated assemblies. The proposed New South Wales Building Bill, expected in Parliament 2026, eliminates duplicate detailed design requirements for prefabricated apartment buildings, projected to save approximately 327,000 dollars per apartment block in design cost. (buy.nsw.gov.au; nsw.gov.au, 2025.)

The Queensland QBuild Modern Methods of Construction Preferred Suppliers Panel has eleven industry partners. The Queensland Government's 2024 budget allocated 2.8 billion dollars targeting up to 600 modular homes in 2024 to 25 and 2,000 social housing modular homes by 2027 to 28. (prefabaus.org.au; hpw.qld.gov.au.)

The federal Housing Australia Future Fund operates a 10 billion dollar credit driving toward 40,000 new social and affordable homes nationally. Round 3 opened January 2026 targeting the remaining 21,350 homes. Separately, the Commonwealth's 54 million dollar Modern Methods of Construction allocation supports state delivery frameworks. (housingaustralia.gov.au, accessed May 2026.)

The 50 million dollar Future of Housing Construction Centre of Excellence at Melbourne Polytechnic's Heidelberg campus was inaugurated 2 October 2025. It is the first Australian training facility dedicated exclusively to Modern Methods of Construction. (melbournepolytechnic.edu.au.)

The Commonwealth Bank of Australia became the first bank to formally join prefabAUS, offering project finance of up to 60 per cent of total contract price before a home is affixed to land, and up to 80 per cent for bank accredited prefab manufacturers. This is the financing infrastructure that has historically blocked offsite delivery at scale. (builtoffsite.com.au, 2024 to 2025.)

International parallels

The institutional capital pattern in Australian Modern Methods of Construction is following a United Kingdom precedent that has been running for a decade.

Greystar, the world's largest apartment operator, used its own development pipeline as the volume anchor for modular manufacturing capacity through 2015 to 2018, delivering the two tallest modular residential structures in the world at the time (38 and 44 storeys at the 10 Degrees development, London). Greystar then exported the model into the United States. In 2024 Greystar secured planning consent for a 1,624 home Build to Rent scheme at the former Peek Freans biscuit factory site in Bermondsey, South London. (multihousingnews.com; Greystar media release, March 2024.)

Legal and General operates a modular homes factory at Sherburn in Elmet, Yorkshire, with an annual target of 3,000 homes. Its flagship Build to Rent scheme at Wandsworth, London, delivered 1,034 homes across 18 buildings, completed December 2024. (group.legalandgeneral.com, December 2024.)

Where Mirvac sits

Mirvac established a 1.8 billion dollar Build to Rent venture in June 2023. In December 2025 Australian Retirement Trust acquired a 48.5 per cent interest in the LIV Mirvac Fund, the 1.7 billion dollar Build to Rent platform. The Build to Rent pipeline is at approximately 1.2 billion dollars actively progressed. (mirvac.com, June 2023; realassets.ipe.com, December 2025.)

The Mirvac Build to Rent pipeline is the quality of demand signal that derisks factory build out for industrial manufacturers. The 442 apartments at Nine delivered with 760 bathroom pods, the more than 200 homes delivered with prefabricated walls and floors across New South Wales and Victoria, the operational MMC capability that Mirvac has built over the past decade, all position Mirvac at the demand anchor decision point.

The strategic question that follows is the subject of Section 8. The recommendation built on the answer sits in Section 11.

The Wesfarmers Built Living entry on the supply side opens a question Project Innovator carries through to Phase 3. Whether Tier 1 Australian developers hold the demand-anchor position as their primary stance, or whether the structural logic that drove Wesfarmers into the supply side eventually applies to the residential developer cohort. This advisory does not resolve that question. It is named here so it sits inside the Phase 3 evaluation rather than as an unaddressed strategic risk on the Phase 2 page.

The three strategic decisions for Mirvac

Scale and aggregation, domestic versus offshore supply, and compliance pathway sequencing. Each framed as a decision with the considerations and the cost of getting it wrong. The recommendation built on these decisions sits in Section 11.

Decision 1. Scale and aggregation strategy

The decision. Mirvac commits either to a programme-wide Modern Methods of Construction platform that designs once and replicates across the LIV Mirvac pipeline, or to a project-by-project trial that scales only as each tower delivers against its committed programme and cost.

The considerations. The financial case for Modern Methods of Construction depends on three preconditions. (McKinsey and Company, Modular Construction, From Projects to Products, 2019.)

• Sufficient design repetition to amortise factory tooling.
• Demand aggregation to factory utilisation above 70 per cent.
• Supplier capacity certainty across the build window.

Without these conditions, modular and Kit of Parts options do not outperform conventional delivery. The Build to Rent pipeline at approximately 1.2 billion dollars actively progressed is the demand signal that makes platform-scale viable for Mirvac specifically. The Section 7 capital flows analysis shows where the crossover point sits, with the Wesfarmers-backed Built Living factory in Perth and the United Kingdom institutional capital pattern as the comparators. The Appendix I commercial model addresses the threshold volume at which the offshore and domestic supply cases diverge.

The cost of getting it wrong. A project-by-project trial that succeeds without a platform commitment loses the design amortisation and supplier learning that makes the next project commercially stronger. A platform commitment made before the first tower has delivered binds Mirvac to a supplier base that has not yet been validated against the actual delivery requirements of a LIV Mirvac asset, with consequent downside if the validation produces a different supplier mix.

Decision 2. Domestic versus offshore supply

The decision. Mirvac selects, for the first Modern Methods of Construction project, a supply position that is either domestic-only, offshore-only, or hybrid with named structural elements sourced domestically and named non-structural elements sourced offshore.

The considerations. The offshore cost advantage at scale, approximately 1,000 to 2,000 dollars per square metre on volumetric and panelised elements, is real where production volume, currency, and freight conditions align. The advantage closes or reverses where domestic supply is available at scale, where the production volume is below the offshore supplier's pricing threshold, or where the compliance cost adjustment for offshore origin is fully applied including the practitioner registration cost under the Design and Building Practitioners Act. For New South Wales specifically, the designer registration pathway for offshore-designed structural modules is not yet resolved at the time of writing. The designer registration gap is the binding compliance constraint on offshore structural supply, not the freight or duty cost. Appendix F sets out the regulatory detail.

The cost of getting it wrong. Offshore structural supply on the first project, ahead of the Design and Building Practitioners Act registration pathway being clarified, exposes Mirvac to a compliance risk that no commercial saving covers. Domestic-only on the first project, without comparison sampling from an offshore supplier on a non-structural element, leaves Mirvac without the reference point that all subsequent supplier commercial discussions will require.

Decision 3. Compliance pathway sequencing

The decision. Mirvac selects, for the first Modern Methods of Construction project, a route mix that either sequences Deemed-to-Satisfy structural elements first, or commits Performance Solutions across structure and fire from the start.

The considerations. Starting the first project with Design for Manufacture and Assembly structural elements that have an established Deemed-to-Satisfy path, Kit of Parts steel or precast under Route 2, reduces approvals risk and supports a tighter pre-construction programme. Starting with Volumetric Modular under Route 1 requires Performance Solutions across structure and fire from day one, with the documentation depth that the Australian Building Codes Board Prefabricated, Modular and Offsite Construction Handbook NCC 2022 sets out. (ABCB Prefabricated, Modular and Offsite Construction Handbook NCC 2022.) Appendix F covers the compliance pathway by route, including the Pafburn ruling on the statutory duty of care under section 37 of the Design and Building Practitioners Act, and the National Construction Code 2025 strengthening of the evidence standard for Performance Solutions on structural elements. The sequencing decision has direct programme and cost implications before a supplier is shortlisted.

The cost of getting it wrong. A Route 1 commitment on the first project, without the Performance Solution pathway scoped and the Building Solutions Practitioner engaged before tender, risks an approvals delay that compresses the construction programme and pushes practical completion past the original target. A Deemed-to-Satisfy-only commitment on the first project delivers a lower Pre-Manufactured Value and a smaller schedule compression than the Hybrid Stack can achieve, which reduces the productivity case for the second project.

Productivity scaffold

Five measures across two layers. Factory content (Pre-Manufactured Value, schedule compression) and site discipline (Percent Plan Complete, Tasks Made Ready, man-hours per m2). Applied to Mirvac's BAU baseline in Phase 2.

When Mirvac evaluates a Modern Methods of Construction option, two questions matter most. First. How much factory work is in this building, and what does that do to cost and programme? Second. Is the site actually running well, or is it absorbing rework and unplanned delays that the Gantt chart does not show? The productivity scaffold answers both questions with five measures, applied to the case study project using Mirvac's own baseline data. The result is a side-by-side comparison across the options Mirvac is evaluating, stated in units the delivery team already works with.

The factory content measures

Pre-Manufactured Value was developed by Cast Consultancy, a UK construction economics firm, as a standard way to compare offsite content across projects and building types. It asks one question. In every dollar spent on this building, how much of the work happened in a controlled factory environment before the component arrived on site? A bathroom pod delivered complete and tested is factory work. A wall frame assembled on the floor plate is site work. (Cast Consultancy, Pre-Manufactured Value as a Measure of Construction Innovation, March 2021.)

Schedule compression is the time-is-money measure and the number Mirvac's commercial team will reach for first. For a Build to Rent programme, every week of earlier practical completion is a week of rental income collected. For Build to Sell, it is a week of reduced finance carry and earlier settlement receipts. The two factory content measures are read together because they do not always move in the same direction. A project can carry significant offsite content that sits off the critical path, producing a strong PMV without compressing the programme at all. Which MMC elements actually control the critical path for Tower 12 is a Phase 2 finding, not an assumption made in this report.

The site discipline measures

Measures 3 and 4 come from the Last Planner System, a planning methodology developed by Glenn Ballard and Greg Howell in the early 1990s and formalised through the Lean Construction Institute. It is used by major contractors globally, including McConnell Dowell across nine Victorian level crossing removal projects, where independent research by the University of Melbourne documented programme and cost improvements. The Last Planner System works because it measures reliable workflow, not optimistic planning. A programme that looks fine on the Gantt but delivers 50 per cent Percent Plan Complete week after week is a programme in trouble. The Gantt is not honest about what is actually happening on the floor plates.

Man-hours per square metre is straightforward to collect, requires no specialist software, and produces a number that any construction director can read and compare. Mirvac already captures labour hours by work package on live projects. Establishing the BAU baseline from a recent comparable tower is a short data exercise. Once the baseline exists, every MMC option in Phase 2 is compared against it in the same unit.

The rework cost connection

These five measures sit alongside a financial lens that most productivity analyses leave out. A 2018 Australian longitudinal study across 346 construction projects found that rework cost averaged 0.39 per cent of contract value and erased 28 per cent of project margin, sustained across seven years. (Love, P.E.D. et al., Production Planning and Control, 2018, 29(13).) The arithmetic is stark. At a net margin of two per cent, a rework bill of less than half a per cent of contract value takes away more than a quarter of the profit. Factory production removes the categories of rework that site conditions create. A bathroom pod built and tested in a factory does not have a leaking wet area discovered six months after handover. A prefabricated riser does not have services coordination disputes resolved by cutting holes in finished walls. The rework cost reduction is not a bonus. It is a structural improvement to margin that belongs in any honest evaluation of MMC options.

Sustainability directional position

Mass timber kit of parts strongest embodied carbon, full volumetric MiC strongest waste reduction, offshore MiC weakest transport. ESD consultant for detailed assessment in Phase 2 to 3.

This section states a directional sustainability position for each Modern Methods of Construction route assessed in Section 5. The detailed Environmental, Social and Governance assessment and the full embodied carbon analysis remain Phase 2 to Phase 3 deliverables, carried out by a specialist ESD consultant with Mirvac's BAU baseline data as the starting point. What this section provides is the system-level direction, naming which route strengthens the sustainability position and which route introduces a transport cost that needs to be weighed against other gains.

Pre-Manufactured Value is the structural sustainability metric in the Project Innovator scaffold. Higher Pre-Manufactured Value correlates with lower site waste because factory production generates less off-cut waste and allows packaging and stillage to be returned to the supplier rather than sent to site skips. Higher Pre-Manufactured Value correlates with lower embodied carbon variance because factory-controlled processes use materials more efficiently and quality control reduces the rework that generates repeat material use. The direction of the correlation is established across the Cast Consultancy dataset and the Phase 1 evidence base. The magnitude of the reduction is specific to the project and requires the ESD consultant assessment to quantify. (Cast Consultancy, Pre-Manufactured Value as a Measure of Construction Innovation, March 2021.)

Per route directional positions

Directional assessments from the Phase 1 evidence base. Not a formal ESD assessment. Phase 2 ESD consultant engagement required for quantification. Offshore MiC transport carbon must be explicitly scoped in Phase 2.

Mass Timber Kit of Parts carries the strongest embodied carbon advantage of the five routes. Cross Laminated Timber and Glue Laminated Timber store biogenic carbon in the building fabric for the life of the structure, reducing the net carbon intensity of the structural system compared with concrete or steel equivalents at the element level. The embodied carbon case is verified for low to medium-rise residential. The MacArthur Gardens, Campbelltown delivery in 2017 is the confirmed Australian reference at that height range. For buildings above 10 to 12 storeys, the hybrid structural approach, mass timber floor elements within a steel or concrete frame, reduces the embodied carbon benefit relative to a pure mass timber structure but retains the biogenic carbon storage advantage on the floor and ceiling elements. (Strongbuild and BlueCHP project documentation, public domain.)

Full Volumetric Modular, Module in Construction delivers the strongest waste reduction of the five routes because the factory environment controls the full fit-out process. Off-cut waste from joinery, services, and wet area installation is generated in the factory where it can be separated, recycled, and managed. Site waste is limited to the structural connections and core works. The trade-off is transport. A factory-built module travels to site as a completed room. Offshore manufacture, predominantly from Chinese factories, adds a shipping container leg that introduces a transport carbon cost not present in site-built or domestic factory options. For offshore Module in Construction, transport footprint is the weakest sustainability dimension of the five routes and requires explicit scope in the Phase 2 ESD assessment.

Kit of Parts, steel and precast delivers steady waste reduction through repeatable cuts, standardised connection details, and pre-manufactured components that arrive to dimension. Site cutting and adjustment waste, concentrated in the structural and facade trades, is reduced because the pre-engineered parts are designed to fit without modification. No transport premium above a conventional project applies because steel fabricators and precast concrete manufacturers already supply Australian towers through established logistics chains.

Panelised and unitised facades carry an airtightness advantage. Factory assembly of aluminium-framed glazed units achieves consistent seal quality that is difficult to replicate in site-installed systems where tolerance, weather, and workmanship variation introduce air infiltration. Earlier weather-tightness from panel installation also reduces weather-exposure risk for the internal fit-out programme, which reduces weather-related rework and the associated re-material cost. The thermal performance gain feeds directly into the NatHERS rating, which the 7-star minimum mandate requires all new residential buildings to meet.

Bathroom and kitchen pods, and multi-service risers deliver the most directly measured waste reduction in the wet area and services trades. Factory testing of pods before dispatch eliminates the commissioning rework that site-installed wet areas generate. Prefabricated risers deliver services to their final position without the on-site cutting, fitting, and adjustment that sequential trade installation requires. Packaging from pod delivery is the main waste-management consideration, and supplier take-back arrangements for stillage and packaging are standard practice with the Australian pod manufacturers confirmed in the Phase 1 supply chain assessment.

The recommendation

The Hybrid Stack on a single LIV Mirvac tower as the Phase 2 evaluation pathway. Three options for the Steering Committee, with the recommended option named.

The recommendation

The Phase 2 evaluation pathway is the Hybrid Stack, Routes 2 to 5 applied to a single LIV Mirvac tower. Domestic suppliers only on the first project. Performance Solutions scoped and the Building Solutions Practitioner engaged before any tender is issued. Volumetric Modular is held as the comparison option on the same project, with its own scored shortlist, so the productivity scaffold figures are produced for both pathways against the same baseline.

The reasoning is structural. The Hybrid Stack combines four Modern Methods of Construction routes on one project, each of which has an established supply chain and an evidence base in Australian residential delivery. The Pre-Manufactured Value uplift across the stack is material, the schedule compression is real on the elements that sit on the critical path, and the compliance position on the first project is held within boundaries that Mirvac's certifier and structural engineer can absorb. The route mix delivers the platform learning, the supplier relationships, and the integration data Phase 3 needs, without making the success of the first tower contingent on a compliance pathway that has not yet been demonstrated at scale in New South Wales.

Three options for the Steering Committee

Option A. Hybrid Stack on a single LIV Mirvac tower. Recommended. Routes 2 to 5 applied to one tower. Kit of Parts structural elements selected for the Deemed-to-Satisfy pathway where the structural grid permits. Performance Solutions scoped before tender for any element that cannot use Deemed-to-Satisfy. Bathroom and Kitchen Pods, Multi-Service Risers, and Panelised or Unitised Facade procured from domestic suppliers confirmed in the Phase 1 supply chain assessment. Phase 2 confirms the shortlist and produces the scored rubric per Appendix K. The Traditional Construction Baseline runs as a parallel Stream 2 deliverable inside the diagnostic-grade Phase 2 scope, alongside the MMC option scoring on the same case study tower, using Mirvac's own historical project data as the benchmark, with the IRM five pillar assessment providing the productivity scaffold for both. The baseline is what makes the Phase 2 option scores defensible inside Mirvac's IC papers. Phase 3 covers factory visits, the Integration Matrix, and the detailed design preparation that locks the design freeze dates the route requires.

Option B. Volumetric Modular on a single LIV Mirvac tower. Route 1 applied to one tower in full. Higher Pre-Manufactured Value than the Hybrid Stack, stronger schedule compression on the structural cycle, and a single production pathway that simplifies supplier governance. The trade-off is compliance and supply chain. Volumetric Modular requires Performance Solutions across structure and fire from day one, and the supply chain at the scale required for a Mirvac tower currently sits offshore with the registration gap identified in Decision 2 of Section 8. Option B is appropriate where Mirvac identifies a comparable Australian project with verified National Construction Code compliance evidence, and a production-ready domestic manufacturer that has not surfaced in the Phase 1 supply chain assessment, before the Phase 2 evaluation begins.

Option C. Stand-alone trial of a single Modern Methods of Construction element. Bathroom Pods only, or Multi-Service Risers only, on one project, with the balance of construction following the Mirvac business-as-usual delivery model. Lowest commercial risk, lowest commercial reward. The productivity scaffold figures will show a measurable but small change against the baseline because the trial removes one element from the critical path rather than restructuring the delivery model around factory production. Option C is appropriate where Mirvac's internal governance requires a bounded proof-of-concept before committing to a Hybrid Stack trial. The Phase 2 scope contracts accordingly, with the scored rubric, the baseline, and the Phase 3 plan all narrowed to the single element under trial.

Why this is a recommendation, not a menu

Phase 1 produced the route assessment, the supplier matrix, the suitability scoring, and the evaluation rubric. The advisory call drawn from that work is the Hybrid Stack on a single LIV Mirvac tower. Presenting Options A, B, and C without a recommendation would put the burden of judgement back onto Mirvac before Phase 2 has produced the data needed to make that judgement with confidence. The recommendation is operator-led, drawn from direct delivery of Kit of Parts apartment projects and offsite manufacturing at scale, and reflects the supply chain depth confirmed during the Phase 1 supplier engagement. The recommendation is the starting position. Phase 2 either confirms it against Mirvac's own data and the supplier shortlist, or surfaces the evidence that revises it.

Roadmap to Phase 2

Phase 2 starting position, work streams, deliverables, and gate to Phase 3. Applied to Tower 12 (or other case study).

Mirvac's instinct at the close of Phase 1 is to move directly into evaluating Modern Methods of Construction options against a project. That instinct is sound. The Phase 1 research has identified the five routes, qualified the supplier field, and set the suitability matrix. Moving quickly to an option score and a programme comparison on a real case study project is the logical next step.

This section proposes a Phase 2 structure that supports that objective and makes the results more defensible. The core argument is simple. Every option score and every programme comparison in Phase 2 is a comparison against something. That something is Mirvac's current delivery model on the same building type. If that baseline is not measured directly, the comparison rests on industry averages and published ranges that may or may not reflect how Mirvac's teams, subcontractors and supply chain actually perform. A comparison built on averages can support any conclusion. A comparison built on Mirvac's own data can only support the conclusion that the data warrants.

Why Pillars 1 through 4 matter before Pillar 5

The Innovation Road Map organises productivity improvement across five pillars. Pillar 5 is the industrialisation step, the commitment to offsite manufacture and Modern Methods of Construction. Pillars 1 through 4 describe how a construction business runs today. They cover its foundational operating disciplines, the quality of its data, the reliability of its production flow, and the strength of its supply chain and commercial relationships. These are not preconditions for Pillar 5. They are the context in which Pillar 5 either succeeds or struggles.

An organisation with strong Lean disciplines already embedded in its site teams, with a reliable and consistent data model, and with a supply chain that meets commitments on time, will extract materially more value from a Modern Methods of Construction commitment than one that has not addressed those foundations. The reasons are practical. Offsite manufacture moves quality control to the factory, but it also moves the consequences of poor coordination upstream. A design freeze missed on a conventional project causes a variation. A design freeze missed on a volumetric modular project causes a module that cannot be installed on the scheduled crane day. The cost and programme impact of the same failure is significantly larger when factory production is in the critical path.

Project Innovator proposes that Phase 2 begins with an Assessment Score, a structured reading of where Mirvac currently sits across Pillars 1 through 4 on the case study project. The Assessment Score is not a report card. It is a calibration tool. It identifies where Mirvac's existing disciplines are strong enough to carry a Modern Methods of Construction commitment without additional preparation, and where targeted strengthening before a Pillar 5 commitment would materially improve the outcome. It also identifies which of the five Modern Methods of Construction routes is the best fit for Mirvac's current operational position, not just the best fit for the building type in isolation.

The Traditional Construction Baseline

The Traditional Construction Baseline is a parallel Stream 2 deliverable inside the diagnostic-grade Phase 2 scope. It runs alongside the MMC option scoring on the same case study tower, using Mirvac's own historical project data as the benchmark, with the IRM five pillar assessment providing the productivity scaffold for both. The baseline is what makes the Phase 2 option scores defensible inside Mirvac's IC papers. It covers floor-cycle durations by zone, crane hook hours per floor split across structure, facade and fitout, labour hours per square metre by task, Percent Plan Complete and Tasks Made Ready from the Last Planner System on recent comparable projects, and waste and rework cost from Mirvac's internal project records. These are the five productivity scaffold measures from Section 9, applied to Mirvac's own BAU performance.

The baseline does two things. First, it makes the Phase 2 option comparison quantitative on Mirvac's own terms. The question ceases to be "does Modern Methods of Construction typically reduce programme by X per cent" and becomes "does this specific route, applied to this specific structural grid and this specific procurement market, reduce Mirvac's programme by a measurable number of weeks against Mirvac's measured floor-cycle record." Second, it surfaces the areas of greatest friction in Mirvac's current delivery model. Where Percent Plan Complete is low and Tasks Made Ready is low, the cause is worth understanding before introducing a new system that depends on reliable planning discipline. Where rework costs are concentrated in specific trades, the case for removing those trades from the on-site critical path is strongest.

The baseline data is practical to collect. Mirvac carries this data internally across its recent tower projects. The Phase 2 kick-off session is the natural point to assemble it. Project Innovator provides the collection template and runs the baseline analysis as the first Phase 2 deliverable.

Stream 1. Mirvac inputs

The Phase 2 kick-off session sets the baseline collection in motion. Mirvac provides floor-cycle durations by zone, crane hook hours per floor split across structure, pods and facade, labour hours per square metre by task, and waste and rework cost benchmarks from recent tower projects. Without this baseline, the option comparison cannot be conducted on a like-for-like basis. Mirvac also provides conceptual designs for the structural options under consideration for the case study project, so that each Modern Methods of Construction route can be evaluated against the same structural grid and programme assumptions. The ESD consultant engagement decision, covering the scope of the sustainability assessment Mirvac wants to run alongside programme and cost, is confirmed at Phase 2 kick-off. Mirvac signs off the supplier shortlist that Project Innovator prepares from the Phase 1 research, enabling capacity confirmations and Phase 3 factory visit scheduling to proceed. For any route requiring a performance solution, Mirvac confirms the performance solution pathway, including the design and programme implications that Mirvac's certifier and structural engineer have advised.

Stream 2. Project Innovator deliverables

Project Innovator delivers the following during Phase 2. The Pillars 1 through 4 Assessment Score, produced from the kick-off session and the baseline data, opens the option evaluation with Mirvac's current position on record. The Traditional Construction Baseline report presents the five productivity scaffold measures for the case study project using Mirvac's own data, establishing the comparator that all subsequent option figures reference. Option scorecards then apply the evaluation rubric from Phase 1 (Appendix K) to the shortlisted Modern Methods of Construction routes, with scoring based on the Mirvac inputs and the verified supplier data from Phase 1. A two-date schedule for each option states likely and conservative practical completion dates, with floor-cycle logic and crane windows by package so Mirvac can assess the programme case against its own delivery record. A cost panel places each option against the baseline on construction cost, programme saving value and rework cost reduction, using the Project Innovator productivity scaffold (Section 9). Productivity scaffold runs (Appendix G) present the five measures for each option against the confirmed baseline. Approvals notes for each route requiring a performance solution name the standard, the Building Solutions Practitioner engaged, and the programme implications. A supplier shortlist with capacity confirmation status and known lead time constraints completes the Phase 2 deliverable set.

Stream 3. External engagements

Three external engagements run in parallel with the Phase 2 work streams. The ESD consultant, once appointed, carries out the sustainability assessment scoped in Appendix H against the options under evaluation, using the boundaries and data inputs confirmed at Phase 2 kick-off. The Building Solutions Practitioner, engaged for any route requiring a performance solution under the National Construction Code, prepares the performance solution report and provides the approvals-pathway programme for inclusion in the option schedules. Shortlisted suppliers confirm production capacity, lead-time ranges, and known constraints specific to the case study project, and confirm their readiness for Phase 3 factory visits where Project Innovator recommends their inclusion in the shortlist.

Phase 3 gate

Phase 3 opens when Phase 2 option scorecards are complete and Mirvac has selected a preferred option or a contained pilot structure for the case study project. Phase 3 covers factory visits and supplier due diligence for the preferred option, the Integration Matrix confirming how the chosen Modern Methods of Construction routes connect with each other and with the Mirvac delivery programme, and the detailed design preparation required to lock the design freeze dates the preferred route requires. Section 11 of Phase 1 Rev 2.0 defined the factory visit scope. Phase 3 executes it against the shortlist that Phase 2 produces.

Phase 2 commercial framework

A Phase 2 commercial framework accompanies this report in the engagement letter. The framework follows Mirvac's procurement standard with stage gates aligned to the Phase 2 streams set out in Section 12. The indicative fee range and milestone schedule are confirmed at engagement-letter execution. The commercial structure scales with Mirvac's chosen Phase 2 shape, diagnostic-grade or rapid-comparison.

Phase 1 assumptions to confirm or update in Phase 2

The Phase 1 conclusions rest on five operating assumptions. Each is stated as an assumption rather than a confirmed fact. Phase 2 either confirms the assumption against Mirvac's own data and the supplier shortlist, or updates it with a verified input and reissues the affected analysis.

• A1. Programme. Business-as-usual programme of approximately 36 months from substructure to practical completion for a comparable mid-rise Mirvac residential tower. Phase 2 action, confirm from Mirvac's project records for recent comparable LIV Mirvac and Build to Sell deliveries.
• A2. Cost. Contract value range of 1.35 to 1.55 million dollars per apartment for mid-rise residential in Sydney, 2025 to 2026. Phase 2 action, confirm with Mirvac's cost team from recent comparable project final accounts.
• A3. Rental income. LIV Mirvac rental income input for the schedule compression model in Appendix I uses an illustrative 700 dollars per apartment per week and a 6.5 per cent stabilised yield. Phase 2 action, Mirvac provides the actual rental and yield assumptions for the case study project from the internal Build to Rent investment model.
• A4. Compliance. The Design and Building Practitioners Act 2020 (New South Wales) designer registration gap for offshore structural module supply applies under the current Act as at May 2026. Phase 2 action, confirm with Mirvac's legal team before any offshore structural option is shortlisted.
• A5. Pre-Manufactured Value methodology. Pre-Manufactured Value calculated using Cast Consultancy methodology, with factory scope defined as work completed in a controlled offsite environment before delivery to site. Phase 2 action, agree the methodology with the appointed Environmentally Sustainable Design consultant and the Mirvac project team before baseline data collection begins.

Appendix A. Foundations, Modern Methods of Construction and Design for Manufacture and Assembly principles

This appendix establishes the Design for Manufacture and Assembly framework underpinning all five Modern Methods of Construction routes evaluated in this advisory. The thirteen sub-sections below provide the reference material Mirvac needs to evaluate route options, scope supplier requirements, and structure Phase 2 procurement decisions with a common technical foundation. Readers seeking route-specific application should use this appendix alongside Appendix E (Comparative Integration Review) and Appendix F (Compliance Pathway Detail).

Modern Methods of Construction and Design for Manufacture and Assembly, foundational definitions

Design for Manufacture and Assembly means designing parts and their interfaces so they are straightforward to make in a controlled factory environment and quick to assemble on site. Value derives from three sources. Repeatable parts that improve with production volume, clean interfaces that eliminate coordination rework between trades, and the transfer of labour from congested weather-exposed sites to a factory setting where productivity, quality and safety conditions are all superior.

Two primary MMC methodologies operate within the framework. Volumetric Modular Construction (also referred to as Modular integrated Construction) delivers room-sized three-dimensional modules largely complete from the factory, connected on site. The principal benefits are parallel factory and site work, and a reduction in on-site trade interfaces. The challenges are module logistics, earlier design freezes and a more intensive compliance assurance burden. Kit of Parts construction delivers standardised structural and facade components designed to fit together consistently on site. The principal benefits are predictable installation sequences and earlier building enclosure. The challenges are interface discipline between package suppliers and clarity on who designs and certifies connections.

The DfMA design philosophy adopted in this framework is agnostic between the two methodologies. The same design should be buildable as conventional construction or with varying degrees of off-site content without requiring major redesign. This keeps procurement options open through the feasibility and design development phases, and allows Mirvac to right-size the MMC commitment to each project as market conditions evolve.

A. Platform thinking and standardisation

Platforms turn one-off project design into repeatable building systems. The transition from project-by-project design to a platform approach is the single most important organisational shift required to realise sustained DfMA benefits. Without a platform, each project repeats the same coordination and procurement effort. With a platform, learning compounds across projects, supplier relationships deepen, and the cost and time to mobilise MMC on any given project falls progressively.

Effective platform design requires four foundational actions. First, define a base grid and service zone structure including typical structural spans, vertical module heights and standard riser positions, then publish these as non-negotiable rules to prevent bespoke creep project by project. Second, build an interface catalogue that standardises connection geometries and fixing points across the structural, floor cassette, facade and MEP interfaces, using a minimal family of connectors and absorbing dimensional tolerances at the interfaces rather than through bespoke detailing. Third, map the modularisation decision, determining where two-dimensional panels, three-dimensional sub-assemblies and fully finished pods add the most value for Mirvac's target building typologies. Fourth, produce a deployment manual covering installation sequences, packaging and lifting plans, quality assurance checkpoints and the permitted range of field adjustments for each part family.

The platform rulebook is a living document. It should be updated after each pilot project with measured data on install rates, tolerance performance and defect incidence. The rulebook is also the mechanism through which Mirvac shapes its supply market. Suppliers who commit to the platform rules become eligible for multi-project preferred engagement. Suppliers who cannot meet the rules are identified before procurement, not during construction.

B. Multi-functional performance

The objective of multi-functional performance is to integrate structure, fire resistance, acoustic separation, thermal performance and surface finish into single factory-built elements wherever this is practical. Integrating multiple functions into one element reduces the number of site operations, eliminates coordination interfaces between trades, and shifts quality control to the factory where it can be measured, corrected and certified before the element leaves the production facility.

Floor and roof cassettes offer the highest integration opportunity in the residential apartment typology. A well-designed cassette combines structural capacity with factory-fitted fire linings to the required Fire Resistance Level, acoustic interlayers, a continuous air and vapour control layer, pre-routed service penetrations with tested collars, pre-installed ceiling fixings, and a pre-finished soffit where the underside is exposed to occupied space. Facade panels can integrate the weather barrier membrane, cavity barriers at floor levels, pre-installed window and door frames, slab-edge fire stops, and bracketry pre-set to the platform grid.

Service-ready features extend multi-functionality into the MEP trades. Standard penetrations with tested sealing collars, plug-and-play MEP connector positions, and pre-positioned fixings for secondary systems all reduce the scope of in-situ work. The whole-of-life dimension of multi-functional design requires that finishes are durable and that sub-components subject to wear, such as bathroom linings, acoustic layers or facade cassettes, are designed as replaceable assemblies accessible without demolishing adjacent structure.

C. Design for Manufacture

Design for Manufacture requires that parts are optimised for existing supplier production capabilities rather than designed in isolation and then presented to suppliers to price. The process-first approach reverses the conventional sequence. The first question is what the supplier's production line can reliably make, and the design is then configured to match those capabilities. This approach minimises changeovers, reduces waste, and allows the supplier to quote with confidence rather than carrying contingency for an unfamiliar process.

Practical DFM considerations include matching part dimensions to current production equipment. Roll-forming widths and lengths, CNC timber cutting envelopes, precast bed sizes, joinery jig patterns and curing press cycles. Tolerances should be specified to what is genuinely achievable in the factory and on site, with connections designed to self-locate and to handle the cumulative tolerances that develop across a multi-storey building without excessive shimming or field cutting. Material yield is addressed by standardising lengths and widths to stock sizes, nesting cut plans to minimise off-cut waste, using symmetric or reversible parts to eliminate left-hand and right-hand variants wherever possible, and establishing rules for the reuse or recycling of off-cut material.

The DFM discipline is most effectively established through co-development workshops with shortlisted suppliers in the pre-tender phase. A workshop that maps the supplier's current production process alongside the draft part specification will identify mismatches before they become RFIs or variations. Resolving production constraints and tolerance conflicts at this stage is materially more efficient than managing them as variations after contract award. The cost of a pre-tender workshop is a fraction of the cost of a single mid-programme deviation from platform dimensions.

D. Design for Assembly

Design for Assembly addresses the on-site half of the DfMA equation. The objective is fast, safe and repeatable site assembly with the minimum number of connection interfaces and the minimum requirement for skilled interpretation of drawings at the point of installation. Where DFM optimises the factory process, DFA optimises the site process. Both disciplines need to be applied in parallel during the design development phase.

Connection design is the single most consequential DFA decision. A minimal family of accessible, self-locating connectors reduces the training burden, minimises the opportunity for incorrect assembly, and allows site supervisors to detect non-conforming installation by visual inspection without detailed measurement. Pre-installed lifting points and pre-set receivers for edge protection systems eliminate the need for site-drilled anchors and reduce the risk of accidental omission of temporary fall protection.

Pre-finishing and pre-commissioning in the factory are the primary programme benefits of DFA. Wet areas, membranes, sealants and surface finishes completed under factory conditions are of consistently higher quality than equivalent work completed on a congested floor plate. Pods and MEP skids bench-tested and certified at the factory arrive on site with a QA record that eliminates the retesting and commissioning work otherwise required for in-situ installation. Site ergonomics and safety design should eliminate work at height wherever possible, minimise hot works, and design temporary stability into the installation sequence so each element is stable and braced from the moment it is set down.

E. Design for Disassembly, Adaptability and Reuse

Design for Disassembly extends the DfMA framework from initial delivery to end of useful life. The objective is to enable future reconfiguration, component recovery and material recycling at the lowest possible cost. For a residential apartment developer with long-term asset ownership ambitions, DfD reduces the cost of repositioning a building for a different tenure or use class, and preserves the embodied carbon value of the structure and facade over multiple lifecycle cycles.

Reversible joints using mechanical fasteners, with critical fasteners exposed and labelled, are the primary DfD enabler. Composite build-ups that permanently bond dissimilar materials should be avoided wherever an equivalent performance can be achieved with a separable assembly. Each part should carry a dismantling sequence and a 'passport' document recording material composition, fixing locations, test data and service history, maintained within the asset information model throughout the building's life. Replaceable sub-assemblies for wear items, specifically bathroom linings, facade cassettes and plant skids, allow individual components to be renewed without structural intervention, reducing the embodied carbon cost of maintenance cycles significantly.

F. Compliance and Assurance

The National Construction Code (NCC) provides two pathways for demonstrating compliance. Deemed-to-Satisfy (DtS), which requires conformance with prescribed solutions, and Performance Solutions, which demonstrate compliance with a Performance Requirement through calculation, test evidence, expert assessment or a combination of these methods. For MMC and DfMA systems, the DtS pathway is rarely available for the full system because the configuration of integrated elements does not match the prescriptive solutions written for conventional construction. Performance Solutions are therefore the standard compliance mechanism for MMC in Australia. (ABCB, Prefabricated, Modular and Offsite Construction Handbook, NCC 2022, December 2024.)

Effective compliance design requires a performance specification for each part family, defining the structural capacity and robustness requirements, fire resistance level and compartmentation performance, acoustic ratings (airborne and impact), thermal and airtightness values, weather resistance and waterproofing, and accessibility standards where applicable. Verification methods should be prescribed at design stage. The decision of whether to use calculation, test report or third-party assessment should be made before factory production commences, not after a problem is identified on site.

Factory quality assurance and traceability are the practical mechanisms through which compliance evidence is generated and maintained. Control plans, process capability studies, first-article approvals, serialisation and traceability records form the evidence base for both NCC compliance documentation and for the contractual quality obligations between manufacturer and developer. These systems must be established and verified before production scale-up, not retrofitted after delivery begins. The ABCB Prefabricated Construction Handbook 2024 provides the framework for structuring evidence of suitability documentation in a form acceptable to certifiers and building surveyors in each Australian jurisdiction.

G. Logistics and Site Integration

Logistics and site integration planning is as technically demanding as the DfMA design itself, and failures in this domain have been responsible for some of the most significant MMC delivery problems documented in the Australian and New Zealand market. The Cairns Woree social housing programme (Appendix B, Case Study 3) illustrates the consequences of a logistics gap directly. Modules manufactured and delivered to site without a contractually accountable weather protection protocol sustained damage that required replacement. Planning logistics as a late-stage coordination task rather than an integrated design constraint is the most common and most costly error in MMC programmes.

Part dimensions must be set with transport and cranage constraints as primary inputs. The road route from factory to site, the largest crane available on the site footprint, and the clearance dimensions of any underpasses or overhead obstructions on the delivery route must all be confirmed before part dimensions are finalised. Flat-pack options should be considered for facade panels where delivery routes are constrained. Every part should carry integrated rigging points and provision for temporary weather protection where the construction sequence requires elements to be delivered and stored before permanent enclosure is achieved.

Legacy interfaces between platform parts and the in-situ structure are a consistent source of programme delay if not resolved in the design phase. Tolerance-absorbing brackets and adjustable fixing systems that connect platform components to the base structure should be designed and tested before the first parts are ordered. Just-in-time delivery flow requires that truck loads are pre-planned against the daily installation sequence, that laydown space and cranage windows are reserved in the construction programme, and that packaging is designed for rapid unpacking and safe return or reuse at the factory.

H. Digital thread, configuration and data

The digital thread is the data architecture that connects design intent to manufacturing instructions to site installation records to the asset information model. Without a digital thread, the benefits of DfMA design are partially lost. Parts may be manufactured correctly but installed incorrectly, quality records may be generated at the factory but not linked to the installed component, and commissioning data may be captured on paper and not transferred to the building management system. With a digital thread, data is captured once and used many times across the programme lifecycle.

The core digital tools for a DfMA programme are a parametric part catalogue constrained by the platform rules, a rules-based configuration engine that links platform geometry to cost, carbon and compliance logic, and a BIM integration that connects the object library to procurement codes, quantity take-off rules and installation inspection and test plans. QR codes on physical parts provide the link between the digital model and the physical component, enabling field QA data and commissioning records to be synced to the asset information model in real time. This eliminates the manual data transfer step that is the primary source of record error and incompleteness on conventional projects.

I. Cost, carbon and business case

The business case for DfMA must be built from part-level economics, not from headline programme compression claims. At the part level, the business case compares the cost of factory manufacture and site installation of each part family against the conventional in-situ alternative, accounting for factory overhead recovery, logistics costs, on-site cranage, and the reduced wet-trade hours on site. The programme benefit is captured separately as a reduction in the finance carry, earlier rental income commencement, and reduced exposure to weather and industrial relations risk.

Target-value design is the recommended approach for managing DfMA economics through the design development phase. In target-value design, the allowable cost and the target productivity metrics (hours per part, square metres installed per day) are fixed at the outset of the design phase, and design decisions are evaluated against their impact on these targets throughout development. This prevents the common pattern where DfMA ambitions are progressively compromised in detailed design as individual cost lines are optimised in isolation without reference to whole-system performance.

Embodied carbon accounting should be conducted at part level, carrying a Life Cycle Assessment result per part family and tracking thermal bridging at connection interfaces where insulation continuity is disrupted. Factory-fitted membranes, gaskets and continuous insulation assemblies that improve airtightness and thermal performance also reduce operational energy demand and contribute to Mirvac's published net positive carbon and Scope 3 reduction commitments. (Mirvac Group, ESG Reporting and Sustainability commitments, mirvac.com, accessed 2026-05-11.)

J. People, safety and maintainability

Safety by design in a DfMA programme goes beyond the conventional construction health and safety obligation. The DfMA design process creates an opportunity to eliminate whole categories of risk by designing the build sequence so that high-risk activities either do not occur or occur in a controlled factory environment. Pre-engineered lifting points, pre-set edge protection receivers and pre-installed anchor points remove the three most common causes of working at height incidents during structural assembly. Single-sided fixings eliminate the need for workers to access both faces of a wall or floor to make a connection. Error-proof connectors that cannot be assembled incorrectly remove the risk of non-conforming installation going undetected.

Maintainability design requires that service access zones are established at the platform design stage and are preserved through detailed design. Removable panels and standard access hatches providing the same opening size and configuration across all buildings in the platform reduce the cost of training and equipping facilities management teams. Common spare parts across all part families reduce inventory holding costs. Inspection and maintenance intervals should be specified per part family and documented in the asset information model, so that planned maintenance programmes can be generated directly from the building information rather than requiring a separate building assessment.

K. Example part families

The four primary part families for the Mirvac residential apartment typology are described below. These families represent the highest-value opportunities for programme compression, quality improvement and carbon reduction in the building types relevant to Tower 12 and comparable Build to Rent and Build to Sell projects.

L. Governance, procurement and market shaping

Platform-based DfMA procurement requires a different governance model from conventional project procurement. The platform rulebook, once published, becomes the qualification standard for all part family suppliers across the programme. Vendors are assessed against their ability to meet the platform rules. Grid compliance, interface geometry, acceptance criteria, QA regime and compliance documentation are the qualification dimensions. Vendors who cannot meet the rules are not considered for preferred engagement, regardless of unit cost. This shifts the procurement conversation from bespoke negotiation to managed category strategy.

Multi-vendor interoperability is a deliberate design objective. The platform rules should be developed so that no single supplier has a proprietary lock on any part family. This requires that the interface standards, not the supplier's specific product, are the non-negotiable element. Dual-sourcing for high-volume part families reduces programme risk if a supplier encounters a capacity or quality issue mid-project, and creates the competitive dynamic that prevents price escalation as the programme matures.

Market shaping is a legitimate and important function for a developer of Mirvac's scale. Publishing the platform rulebook, communicating forward programme volumes, and running structured supplier development workshops all contribute to developing the Australian MMC supply market's capability to meet Mirvac's needs. The current Australian market has limited depth in factory-built residential components at Tier 1 quality and NCC compliance standard. Mirvac's platform commitment is one of the mechanisms by which that depth is built. (McKinsey and Company, Modular Construction: From Projects to Products, June 2019.)

M. Implementation roadmap

The implementation roadmap moves from platform definition to scaled delivery across six stages. The stages are sequential in logic but can overlap in practice, particularly in the transition from prototype and test to pilot. The roadmap applies equally to a first-time DfMA adopter and to an organisation deepening an existing capability. The entry point is calibrated to current state, not assumed to be zero.

Appendix B. Builder adoption case studies

This appendix documents six builder adoption case studies drawn from field research conducted in Phase 1 of this advisory. They span four of the five Modern Methods of Construction routes evaluated in the main report and cover international and Australian examples at apartment and Build to Rent scale. The Strongbuild MacArthur Gardens project is included because Adam Strong, Managing Consultant at Project Innovator, led its delivery as Managing Director of Strongbuild. The other five are drawn from publicly documented sources, independently verified where verification evidence exists and tagged accordingly where it does not.

Appendix C. Modern Methods of Construction matrix

Appendix D. Supplier profiles

Twenty profiles plus one documented declination, organised by Modern Methods of Construction category. Eight Phase 1 profiles refreshed with November 2025 audit corrections. Twelve new profiles added. Cost figures retained as supplier-reported indicative ranges, not independently verified rates.

Each profile gives the verifiable facts a Phase 2 short-listing decision needs. Where a field could not be verified from public sources it is tagged 'Phase 2 confirmation' rather than filled with a survey number that has no audit trail. Cost figures from supplier surveys are retained as supplier-reported indicative ranges. They are not independently verified rates, and they are not a substitute for the cost build-up that the Phase 2 cost panel will produce against Tower 12 (or other case study) specification.

At a glance

Twenty-one suppliers, six categories, indexed by Mirvac status and Phase 2 priority. Click into the relevant category section below for the full profile.

Ten profiles cover the Volumetric Modular and adjacent kit of parts platform options. Australian capacity sits with Modscape and Shape Modular. The offshore options (TLC, Stack, HH, DMD, Gropyus) require an offshore compliance pathway, traceability protocols and equivalence to Australian Standards as Phase 2 work before procurement consideration. Volumetric Modular is the most complete factory delivery of the five Modern Methods of Construction routes. The integration matrix in Appendix E names the critical interfaces.

Three profiles. Two volume manufacturers (Interpod, Sync Industries) carry the bulk of Australian bathroom pod capacity in 2026 and both hold an existing Mirvac client relationship, removing supplier qualification work in Phase 2. The third (Building Elements) requires a full qualification process before being treated as a comparable third option.

Two profiles. Complementary, not competitors. NeXTimber supplies Cross Laminated Timber (CLT) for floor and wall panels, the only domestic Australian CLT manufacturer. ASH MASSLAM supplies Glue Laminated Timber (GLT) for post and beam columns. For a hybrid mass timber Tower 12 (or other case study), both suppliers are engaged concurrently.

Three profiles. Australia's only documented vertical riser supplier at scale (A.G. Coombs) is the anchor of this category. Kavanagh and Benmax provide adjacent capability in HVAC ductwork, multi-service frames and mechanical plant skids. Engagement model for Tower 12 (or other case study) is most logically A.G. Coombs for vertical risers, with Kavanagh or Benmax for horizontal ductwork cassettes and plant skids where A.G. Coombs does not self-perform. Scope split is a Phase 2 item with the mechanical consultant.

Two profiles. Class 2 residential towers above 25 metres (Type A or Type B construction) require non-combustible external wall cladding under the NCC. Both Askin Volcore (mineral wool, FM-approved) and Kingspan K-Roc (mineral wool, NCC C2D10(6)(g) compliant) satisfy this requirement. PIR core products from either supplier do not, and must not be specified for high rise residential external facades by default. Procurement specification must call out the non-combustible variant explicitly.

Three profiles. Each offers 7 metre unpropped span composite floor capability with shallow floor zones. Slimdek 210 carries the strongest Australian project record. Deltabeam carries the strongest stated fire rating (R120 without additional fireproofing). All three require structural engineering specialist sign-off. Phase 2 selection should run a side by side assessment against the specific structural grid and Fire Resistance Level requirements for Tower 12 (or other case study).

Cross-supplier observations

Pods. The two volume manufacturers (Interpod and Sync Industries) between them deliver the bulk of Australian bathroom pod capacity in 2026. A 200 apartment project at one pod per apartment is approximately 22 days of Interpod production at peak rate. Both suppliers carry an existing Mirvac client relationship, removing supplier qualification work in Phase 2. Building Elements requires a full qualification process before being treated as a comparable third option. Indicative pricing for Australian bathroom pods sits in the range of $8,000 to $25,000 per pod depending on specification and volume. This is general industry context, not a supplier published rate. Phase 2 direct engagement will produce actual rates for Tower 12 (or other case study) specification.

Mass timber. NeXTimber and ASH MASSLAM are complementary. NeXTimber supplies CLT panels for floor and wall plates. ASH MASSLAM supplies GLT for post and beam columns. For a hybrid mass timber Tower 12, both are engaged concurrently. Australian residential high rise above 25 metres in mass timber is an emerging category. Structural engineering specialist (Arup, Aurecon, Thornton Tomasetti or equivalent) must be engaged in Phase 2 to validate the structural system before the supplier shortlist is confirmed. NeXTimber's facility opened March 2024. Production slot availability for 2026-27 is a procurement timing item.

Services and MEP prefabrication. A.G. Coombs is the only Australian supplier with a documented vertical riser portfolio at scale (300 plus risers, named high rise commercial references). Kavanagh and Benmax have prefabrication capability in adjacent product categories. For Tower 12, the most logical engagement is A.G. Coombs for vertical riser design and prefabrication, with Kavanagh or Benmax for horizontal ductwork cassettes and plant skids where A.G. Coombs does not self-perform.

Facade systems. Class 2 residential towers above 25 metres (Type A or Type B construction) require non-combustible external wall cladding. Both Askin Volcore and Kingspan K-Roc satisfy this requirement. PIR core products from either supplier do not and must not be specified by default. Kingspan K-Roc local manufacture at St Marys is the shortest supply chain to Sydney sites.

Composite floor systems. Truedek, Slimdek 210 and Deltabeam each offer 7 metre unpropped span composite floor capability with shallow floor zones. Slimdek 210 has the strongest Australian project record. Deltabeam has the strongest stated fire rating. All three require structural engineering specialist sign-off. Phase 2 selection should run a side by side assessment against the specific structural grid and Fire Resistance Level requirements for Tower 12 (or other case study).

Appendix E. Comparative integration review

Five Modern Methods of Construction families against six building elements. Thirty cell intersections. Per cell, integration pattern. Critical interfaces named so Phase 2 design coordination work can be scoped before procurement.

This appendix sets out the integration pattern between the five Modern Methods of Construction families (rows) and the six primary building elements of an apartment tower (columns). The matrix exists because no single Modern Methods of Construction route delivers an entire building. Every option leaves some elements as conventional site work, integrates with adjacent elements that another supplier delivers, or shifts a scope boundary that the head contractor's commercial team needs to plan around. The matrix gives the design and procurement team a single page reference for those scope boundaries before the rubric in Appendix K is applied to a specific shortlist for Tower 12 (or other case study).

The five families are the five routes evaluated in Section 5. The six elements are cores, structure, services, facade, pods, and finishes. Cells are described as owned (factory delivered, complete on installation), integrated (factory delivered partial, with named site interface), or separate scope (conventional site work or another supplier's delivery). Where a cell carries a 'critical interface' note, that is the line on which the success or failure of the option turns.

The integration matrix

Critical interfaces by route

The matrix highlights five interfaces that determine whether a Modern Methods of Construction option delivers the expected programme and quality outcome on Tower 12 (or other case study). These are the lines at which the design and procurement team should focus Phase 2 design coordination work and Phase 3 first article inspections.

Volumetric Modular, module to core. The connection at the core is the most exposed interface in volumetric construction. Waterproofing, acoustic seal, fire stopping, services connection and dimensional tolerance all converge at this line. Design, supplier specification and site sequencing all need to be agreed at the schematic design stage, not during construction documentation.

Kit of Parts, pod to floor cassette. Where a kit of parts structural option is paired with a pod option (Route 2 plus Route 3 in combination, the dominant Australian apartment Modern Methods of Construction pattern), the dimensional coordination between two factory deliveries is the line on which programme certainty depends. Both factories must work to the same tolerance protocol, agreed in Phase 2 before fabrication starts.

Multi-Service Risers, riser to pod stack. Vertical services risers depend on dimensional alignment with pod waste stacks at every level. A 50 millimetre dimensional drift between the two factory deliveries becomes a cumulative misalignment over 20 levels. Resolution is a coordinated set-out drawing issued before either factory begins fabrication.

Panelised Facade, slab edge to facade panel. The facade-to-structure interface determines weatherproofing, thermal performance, acoustic seal at the perimeter, and structural deflection accommodation. Design coordination with the structural engineer is the single most important Phase 2 output for any panelised facade option.

All factory deliveries, arrival sequence and logistics. The matrix shows owned and integrated cells as factory deliveries. The site must accept those deliveries in a sequence that suits the floor cycle. Factory delivery scheduling, lay-down area, and crane time are the binding constraints on programme. The Phase 2 logistics plan addresses this for each shortlisted option.

Reading the matrix for Tower 12 selection

The matrix is descriptive, not prescriptive. The intent is to make the boundaries between Modern Methods of Construction supply and conventional trade scope explicit so the head contractor's commercial team can assemble an honest cost panel and the design team can scope the integration design work for Phase 2.

Three patterns recur across the five families.

1. Owned cells reduce site labour and rework cost. Factory delivery removes weather risk, removes site coordination disputes, and produces measurable schedule compression where the element is on the critical path. Factory delivery does not by itself compress the programme if the element is not on the critical path. Whether each owned cell is critical path on Tower 12 is a Phase 2 finding from the floor cycle analysis.

2. Integrated cells require Phase 2 dimensional coordination. Factory deliveries connect to other factory deliveries or to site work at named interfaces. Each integrated cell carries a coordination cost in design, and a tolerance management protocol in fabrication and installation. Integration cells are where Phase 2 design coordination work concentrates.

3. Site work cells remain conventional trades. No Modern Methods of Construction route delivers an entire building. Every option leaves some scope as conventional site work. The cost panel must make the conventional scope explicit, alongside the factory delivered scope, so the comparison with the BAU baseline is like-for-like.

Appendix F. Compliance pathway detail

National Construction Code 2025 staggered adoption, the Design and Building Practitioners Act July 2026 registration requirements, the Pafburn liability cascade, Professional Indemnity Insurance implications, and a compliance pathway table by Modern Methods of Construction route. Extends Section 5 and Section 7 with the regulatory detail Mirvac's certifier, structural engineer, and legal team will need to brief.

National Construction Code 2025 staggered adoption

The National Construction Code 2025 adoption is staggered across jurisdictions. New South Wales adopted the new edition on 1 May 2025, with remaining states and territories adopting on a phased basis through 2025 and into 2026. (Australian Building Codes Board, National Construction Code 2025 adoption schedule.) The structural element of the change that matters for Modern Methods of Construction is the strengthening of the evidence standard required for Performance Solutions. Performance Solutions for structural compliance now require analysis and test evidence, not professional judgement alone. The Performance Solution Report must set out the analysis method, the test standard, the test data, and the verification pathway. The change applies regardless of whether the structural element is delivered conventionally or as an offsite-manufactured module.

For Volumetric Modular and Kit of Parts structural elements, this is the binding compliance change. The Performance Solution Report cannot rest on the manufacturer's design certification alone. It must demonstrate compliance against the Australian Standards referenced in the National Construction Code, with test data that the certifier can review against named test methods. The Building Solutions Practitioner engaged for the Performance Solution must hold National Construction Code competency at the level required for the building class and rise.

Design and Building Practitioners Act July 2026 registration requirements

The Design and Building Practitioners Act 2020 (New South Wales) imposes registration requirements on practitioners involved in the design and construction of Class 2 buildings, including mixed-use buildings with Class 2 components. From July 2026, registration applies to designers and design practitioners producing regulated designs, including structural designs, fire safety designs, building services designs, and external waterproofing designs. (NSW Department of Customer Service, Design and Building Practitioners Act 2020 registration pathway.) The Act introduces a chain-of-evidence requirement, the regulated design certificate, that links each design element to a named registered practitioner.

For Modern Methods of Construction supply, the operative question is whether the offshore designer of a volumetric module can be registered as a design practitioner under the Act for a New South Wales project. The current position is that the registration pathway for offshore structural designers is not resolved at the time of writing. The practical implication is that Volumetric Modular and offshore Kit of Parts structural supply on a New South Wales project require either a registered New South Wales design practitioner to verify, accept, and re-issue the regulated design certificate against the offshore design, or a different procurement structure that places the structural design responsibility with a New South Wales-registered party.

Domestic Modern Methods of Construction supply does not face this constraint. Australian manufacturers, including the Australian Kit of Parts and panelised facade suppliers identified in the Phase 1 supply chain assessment, operate with locally registered designers and engineers, and the regulated design certificate sits inside the existing Australian design and certification chain.

The Pafburn liability cascade

The Pafburn ruling confirmed that the statutory duty of care under section 37 of the Design and Building Practitioners Act 2020 (New South Wales) is owed by every practitioner involved in the construction of a Class 2 building to current and subsequent owners. The duty is non-delegable. The duty is concurrent. (Pafburn Pty Ltd v The Owners – Strata Plan No 84674, HCA 2023.) A breach by any practitioner carries the full liability for the resulting loss, regardless of how the breach interacts with the work of other practitioners.

For Modern Methods of Construction, the Pafburn position has direct documentation consequences. Cladding, facade, and external waterproofing systems require a documented chain of compliance evidence from the manufacturer's specification through the design specification, the installation supervision, the testing, and the practical completion handover. The evidence chain must support a defence to the statutory duty of care for the limitation period applicable to the works. For Mirvac as developer, the practical effect is that supplier documentation must reach an evidentiary standard sufficient to discharge the statutory duty, not just the building approval requirement. The two standards are not the same.

Professional Indemnity Insurance implications

Professional Indemnity Insurance for Modern Methods of Construction projects in Australia has tightened materially since the Design and Building Practitioners Act commenced. Insurers now apply specific underwriting requirements where structural elements are sourced offshore or manufactured offsite, including evidence of the manufacturer's quality management system to International Organisation for Standardisation 9001 or equivalent, evidence of factory production control to the relevant National Construction Code-referenced standard, and evidence of the manufacturer's own Professional Indemnity Insurance position. For offshore structural module supply specifically, coverage gaps exist where the offshore designer is not a registered Australian practitioner. The detail of the coverage position varies by insurer and project, and the Phase 2 procurement work confirms the position for each shortlisted supplier with Mirvac's insurance broker. (Source required, Phase 2 confirmation with Mirvac's insurance broker.)

Compliance pathway by Modern Methods of Construction route

Evidence of suitability folder outline

The Phase 1 evaluation rubric in Appendix K requires a Compliance score of 5 supported by named, verifiable evidence specific to the option being assessed. The evidence folder for a score of 5 contains the following items, all dated, all signed by named registered practitioners, and all linked to the regulated design certificate chain under the Design and Building Practitioners Act.

For all routes. A Performance Solution Report where required, prepared by a Building Solutions Practitioner with the relevant National Construction Code competency. Regulated design certificates from each registered design practitioner involved. Manufacturer's quality management system certification to International Organisation for Standardisation 9001 or the relevant equivalent. Factory production control records covering the production period of the elements supplied to the project. Construction-stage compliance verification records linking the as-delivered elements to the design specification.

For Routes 1 and 2 structural elements. Structural design certificate against the named Australian Standards. Connection detail test data for non-standard connections. Inter-element tolerance verification records.

For Route 3 and Route 4 services-based elements. Product certification for the contained services. Factory acceptance test records demonstrating the unit met its specification at the point of dispatch.

For Route 5 facade elements. Full test suite per AS/NZS 4284, AS 5113, and AS/NZS 1170.2. As-built installation records by panel. Practitioner-signed verification that the as-installed configuration matches the tested configuration.

Appendix G. Productivity scaffold detail

Formulas, Phase 2 input requirements, and a worked example for all five productivity scaffold measures. Extends Section 9.

This appendix sets out the calculation method for each of the five productivity scaffold measures introduced in Section 9, the baseline data Mirvac needs to provide for Phase 2, and an illustrative worked example. Phase 2 replaces all placeholder inputs with Mirvac's actual data from the case study project. The worked example uses a hypothetical 200-apartment mid-rise residential tower to show how the scaffold runs and how the outputs are read side by side.

Measure definitions and formulas

Worked example

The following applies the scaffold to a hypothetical 200-apartment residential tower of 16 storeys and approximately 14,500 m2 of gross building area in Sydney. All inputs are illustrative. The BAU programme is set at 36 months from substructure to practical completion. Phase 2 replaces every figure with Mirvac's actual data from the case study project.

Three scenarios. BAU runs a conventional concrete frame with site-built wet areas. Hybrid Stack covers Routes 2, 3, 4, 5 (kit of parts structure, bathroom pods, prefabricated risers, and unitised facade). Volumetric Modular is Route 1 (complete apartment modules delivered factory-finished).

Rework cost supplement

The five measures above do not explicitly capture rework cost, but the rework cost connection is central to the financial case for MMC. A 2018 longitudinal study across 346 Australian construction projects found that rework cost averaged 0.39 per cent of contract value and erased 28 per cent of project margin, sustained across seven years of real data. (Love, P.E.D. et al., Production Planning and Control, 29(13), 2018.)

The implications are substantial for a 200-apartment project at approximately $285 million contract value. At 0.39 per cent, the expected rework cost is approximately $1.1 million. At a net margin of 2 per cent, the total project margin is approximately $5.7 million. The rework cost consumes roughly a fifth of the project margin before any other overrun is counted. Factory production reduces the rework categories that site conditions create. A bathroom pod built and tested in a factory does not produce a leaking wet area discovered after handover. A prefabricated riser does not require holes cut in finished walls to resolve services coordination disputes. The rework cost reduction available from factory production is not a bonus. It is a structural improvement to project margin that belongs in any honest commercial evaluation.

Project Innovator will quantify the expected rework cost reduction for each shortlisted option in Phase 2, using Mirvac's own rework records from comparable projects as the BAU baseline and the supplier's production defect rates from their factory quality management system as the MMC input.

Appendix H. Sustainability directional detail

ESD consultant brief checklist, directional embodied carbon ranges by MMC route, site waste intensity targets, transport reporting, and EPD requirements for Phase 2. Extends Section 10.

This appendix translates the sustainability directional position in Section 10 into the specific deliverables Mirvac and the ESD consultant need to produce in Phase 2. It sets out the scope of the embodied carbon comparison, the EPD requirements by system, the waste intensity targets, and the transport reporting approach. All figures below are directional. Certified EPD-based calculations are a Phase 2 deliverable.

ESD consultant brief checklist

The following is the minimum scope for the ESD consultant engaged in Phase 2 to produce a credible sustainability comparison across the shortlisted MMC options.

Directional embodied carbon ranges by MMC route

The following ranges are directional, based on available case study data and published industry benchmarks. They are not certified and must not be used in reporting, marketing or investor communications without an ESD consultant's verification against the specific project specification.

PMV and waste intensity connection

Higher Pre-Manufactured Value correlates with lower site waste intensity and lower embodied carbon variance, across the Cast Consultancy dataset and the Phase 1 evidence base. The direction of the correlation is established. The magnitude is project-specific and requires ESD consultant assessment to quantify. (Cast Consultancy, Pre-Manufactured Value as a Measure of Construction Innovation, March 2021.)

Factory production removes the categories of site waste that are hardest to control. Off-cut timber, plasterboard, wet area waterproofing off-cuts, and rework material are all eliminated. A bathroom pod produced in a factory generates packaging waste and some off-cut material at the factory, but both are managed in a single controlled environment with supplier return arrangements for packaging and stillage. The same bathroom built on the floor plate generates site waste at the work package level, spread across multiple trades, with no packaging return and no reliable waste stream separation.

Reporting cadence and hand-off date

Appendix I. Commercial detail

The McKinsey trilogy on industrialisation, a directional time-value-of-money model for schedule compression on Build to Rent, the offshore versus domestic cost spread, the rework-to-margin connection, and three commercial risks specific to Modern Methods of Construction in the Australian context.

The McKinsey trilogy

Three McKinsey reports frame the global commercial case for industrialisation in construction. Reinventing Construction (2017) sized the global productivity opportunity at approximately 1.6 trillion United States dollars annually, a 35 to 40 per cent productivity uplift if the construction sector matched the average of all other industries. (McKinsey Global Institute, Reinventing Construction, 2017.)

Modular Construction, From Projects to Products (2019) narrowed the lens to volumetric and modular delivery. Cost reduction of 20 per cent and programme reduction of up to 50 per cent are achievable in sectors with high design repetition. The gains depend on three preconditions, sufficient design repetition to amortise tooling costs, demand aggregation to factory utilisation above 70 per cent, and client acceptance of standardised outputs. Without these conditions, modular delivery does not outperform traditional delivery. (McKinsey and Company, Modular Construction, From Projects to Products, 2019.)

The Next Normal in Construction (2020) projects that contractors who industrialise their delivery model will generate two to three times greater Earnings Before Interest, Taxes, Depreciation and Amortisation margins than those who remain project by project. (McKinsey and Company, The Next Normal in Construction, 2020.) The three reports read together produce a single commercial conclusion. Industrialisation is the structural lever that resets the cost curve for a residential developer with a large enough pipeline to aggregate demand against factory capacity. Mirvac's Build to Rent pipeline at approximately 1.2 billion dollars actively progressed is at the demand-aggregation threshold that the McKinsey case rests on.

The cost of a week of programme delay

Schedule compression on a Build to Rent tower translates directly into rental income earned earlier and construction finance carry held for less time. The framework below is directional. Phase 2 replaces the input variables with Mirvac's actual rental, yield, debt, and finance carry assumptions from the internal Build to Rent investment model for the case study project.

For an indicative 200-apartment Build to Rent tower at a market rent of 700 dollars per apartment per week, gross weekly rental income at full occupancy is approximately 140,000 dollars. Every week that practical completion is delayed, the asset forgoes that week of rent and the construction debt continues to accrue interest for one additional week. The two together are the per-week cost of delay.

• Lost rent for the week. Approximately 140,000 dollars at full occupancy for a 200-apartment tower at 700 dollars per apartment per week. The income is shifted forward by one week, it is not added to a future year. Each week of delay is a week of rent that does not come back.
• Construction finance carry held for one additional week. Driven by the peak construction debt position and the interest rate. Order-of-magnitude only for an indicative 200-million dollar peak debt at 7 per cent per annum, the weekly carry is approximately 270,000 dollars. The actual figure depends on the lender, the staging, and the loan structure on the case study project.
• Lease-up curve effect. Earlier practical completion shifts the lease-up curve forward by the same period. The realised cash flow gain depends on how quickly the tower reaches stabilised occupancy from practical completion, which the Mirvac investment model holds.

The figures above are directional only. They are framed in Mirvac's own commercial units so the Phase 2 commercial work can populate them from the actual investment model inputs. The Mirvac internal Build to Rent investment model is the canonical source. The framework shows how Phase 2 connects the schedule compression measure from the productivity scaffold (Section 9) to a per-week cost-of-delay figure stated in dollars Mirvac's investment committee already works with.

Offshore versus domestic cost spread

The offshore Modern Methods of Construction cost advantage at scale, approximately 1,000 to 2,000 dollars per square metre on volumetric and panelised elements, is conditional. The conditions under which the advantage is real:

• Production volume at a scale that justifies the supplier's pricing position.
• Australian dollar to United States dollar or Chinese yuan exchange rate movement within a manageable band over the production period.
• Freight rates within the historical range, with no port congestion or international shipping disruption.
• Compliance cost adjustment for offshore origin fully applied, including the practitioner registration cost under the Design and Building Practitioners Act, the additional documentation work required for offshore design certification, and the import duty and Goods and Services Tax recoverable position.

The conditions under which the advantage closes or reverses:

• Domestic supply available at the volume required, where the domestic factory production cost approaches the all-in offshore landed cost.
• Single-project trial scope, where the production volume is below the offshore supplier's pricing threshold.
• Compliance cost adjustment becomes binding rather than nominal, including a Performance Solution scoped specifically for offshore-designed structural elements.

The directional position for the Mirvac first project is that the offshore advantage is unlikely to be the decisive commercial factor. The compliance position, the Professional Indemnity Insurance position, and the supply chain certainty on the first delivery are the dominant variables.

The rework-to-margin connection

Rework cost at 0.39 per cent of contract value erases 28 per cent of project margin in mid-tier and residential construction. The figure is from a seven-year longitudinal study of one Australian contractor across 19,605 rework events on 346 real projects. (Love et al., 2018, Production Planning and Control, 29 (13).) Mid-tier and residential builder net margins sit at 1 to 3 per cent. (Master Builders Australia, National Forecasts 2023.) A small movement in rework cost is therefore a large movement in commercial result.

Factory production reduces the rework categories that site conditions create. Wet area waterproofing rework, plasterboard finishing rework, joinery installation rework, and services coordination rework are the categories most consistently reduced when the element is delivered as a factory-finished module or pod. The Phase 2 productivity scaffold (Section 9 and Appendix G) measures rework cost as one of the five scaffold measures, with Mirvac's recent project records providing the baseline figure against which each option is compared.

Commercial risk register, Modern Methods of Construction specific

Risk 1. Currency exposure on offshore supply. Offshore Modern Methods of Construction supply is denominated in United States dollars or Chinese yuan at the point of contract. Production windows of 6 to 12 months from contract execution to factory dispatch expose the project to exchange rate movement that can erode or reverse the offshore cost advantage. Phase 2 commercial work confirms the hedging position with Mirvac's treasury team for any offshore-shortlisted option, with the hedging cost included in the all-in landed cost comparison.

Risk 2. Payment milestone mismatch between factory delivery and site readiness. Factory production milestones typically trigger progress payments at percentage completion against the manufactured element. Site readiness to receive the element depends on the construction programme. A factory-complete element that arrives before the site is ready creates storage cost, double-handling risk, and supplier dispute risk where storage cost is contested. Phase 2 commercial work confirms the payment milestone structure and the site-readiness verification process for each shortlisted supplier, with the payment trigger linked to a defined site condition rather than factory completion alone.

Risk 3. Programme extension risk where offsite elements sit off the critical path. Factory production reduces site duration on the elements it covers, but it only compresses the programme if those elements sit on the critical path. Where the offsite elements sit off the critical path, the programme does not compress and the commercial case rests on rework reduction and quality improvement alone. Phase 2 floor cycle analysis identifies which elements are critical path for the case study project, with the productivity scaffold figures presented separately for critical path and non-critical path scope.

Appendix K. Evaluation rubric template

A weighted, evidence-based scoring framework for comparing Modern Methods of Construction options against the business-as-usual baseline in Phase 2.

This rubric gives Mirvac a consistent, evidence-based way to compare Modern Methods of Construction options against the business-as-usual baseline for a specific project. It was developed in Phase 1 as a draft framework and is carried forward to Phase 2 as the scoring instrument Mirvac's project team and Project Innovator will apply with real data, once the criteria, weightings, and scoring scale have been confirmed with Mirvac.

The rubric is weighted. Eight criteria reflect the factors that matter most for a mid-rise residential tower in the current market. Weights are adjusted by Mirvac to reflect the case study project priorities before Phase 2 scoring begins. The weights below are the default Phase 1 settings.

How scoring works

Each criterion is scored from 1 to 5.

• Score 5. Named, verifiable evidence specific to the option, including test certificates, programme schedules, and cost build-ups itemised by line.
• Score 3. Evidence is present but incomplete.
• Score 1. The option is at concept stage with material open items.

One rule overrides all others. If Compliance scores red (1 or 2), the option does not advance, regardless of how strongly it scores on other criteria. Compliance is not a tiebreaker. It is a gate.

Scores are multiplied by the criterion weight and summed to a weighted total out of 100. The option with the highest weighted total is the recommended shortlist lead, subject to Compliance being green.

Scoring scale

Eight criteria and weights

The top four criteria carry 75 per cent of the weighted total. This reflects where the Phase 2 evaluation decision is actually made. An option that cannot clear compliance, deliver a credible productivity case, stack up commercially, and demonstrate quality assurance cannot be shortlisted regardless of its sustainability or scalability credentials.

Evidence checklist by criterion

The following sets out what good evidence looks like for each criterion. Assessors rate on the 1 to 5 scale above, and the checklist defines the upper anchor.

Decision rule

Worked example, Route 1 vs Kit of Parts hybrid stack (Routes 2, 3, 4, 5)

The following example applies the rubric to two hypothetical options for a mid-rise residential tower. Numbers are illustrative and intended to show how scores combine, not to represent any specific project. Phase 2 replaces these placeholders with real data from Mirvac's shortlisted options.

The five routes assessed in Section 5 provide the framework. Route 1 (Volumetric Modular), Route 2 (Kit of Parts structural system), Route 3 (Bathroom and kitchen pods), Route 4 (Multi-service risers), and Route 5 (Panelised facade). The Kit of Parts hybrid stack in this example combines Routes 2, 3, 4 and 5.

Option A, Volumetric Modular (Route 1). A local manufacturer delivering complete apartment modules with structure, facade, fit-out and services integrated in the factory. Comparable project completed in Queensland (16-storey, 190 apartments). NCC compliance pathway via Performance Solutions for structure and fire.

Option B, Kit of Parts hybrid stack (Routes 2, 3, 4, 5). A panelised structural system (kit of parts columns, beams and floor cassettes) with bathroom pods from a separate local supplier, multi-service risers prefabricated in New South Wales, and a unitised facade system. Four suppliers coordinated under a single project delivery agreement.

Appendix M. Evidence register

Sources used across this report, verified against primary sources as part of the Rev 3.0 audit (Track E, May 2026).

Appendix N. Glossary

Terms used in this report. Phase 1 terms refreshed and new Rev 3.0 terms added.