For two years the national prefab certification scheme has been a line item in budget papers and a promise in communiques. The ABCB has now put draft rules, a draft NCC definition and an economic analysis on the table. This is the round where the detail gets decided.

The Australian Building Codes Board has opened consultation on the National Voluntary Certification Scheme for Manufacturers of Prefabricated Construction. Feedback closes at 11.59pm AEST on 15 September 2026.

That sentence has been written before, in various forms, since 2024. What makes this round different is what is actually in the box.

Previous consultation asked the industry what a scheme should look like. This one puts up a proposed framework, draft Scheme Rules, a proposed NCC definition for prefabricated construction, and a draft economic analysis. A discussion paper sits alongside them for context. The questions have moved from whether to how, and how is where the money is.

What Is Actually Being Consulted On

The ABCB is seeking feedback on three things.

• A proposed definition for prefabricated construction within the National Construction Code. This is the part that eventually binds. Everything else in the scheme hangs off what the NCC says prefabricated construction is.
• The proposed Scheme framework and draft Scheme Rules. The operating detail. Who certifies, what gets audited, what a manufacturer has to demonstrate, and what a certified manufacturer gets in return.
• The draft economic analysis report. The cost and benefit case supporting the scheme. Worth reading if you want to understand what the scheme is being asked to deliver, and against what assumptions.

The ABCB has said it worked with industry representatives and state and territory regulators on nationally consistent definitions for prefabricated construction and that these would be inserted into the NCC at a future time to implement the scheme.

What is prefabricated construction certification?

It is a voluntary pathway for a factory, rather than an individual building, to be certified against a national standard. Instead of a manufacturer proving compliance from scratch on every project, in front of every certifier, in every state, the manufacturer certifies once and carries that certification into the market. The scheme is intended as an alternative route to demonstrating NCC compliance, not a replacement for the routes that already exist.

Instead of proving compliance from scratch on every project, in front of every certifier, in every state, the manufacturer certifies once and carries that certification into the market.

The Word That Changed

There is a detail in this consultation that is easy to skim past.

The 2025 issues paper round was titled the National Voluntary Certification Scheme for Manufacturers of Modern Methods of Construction. This round is titled Manufacturers of Prefabricated Construction.

Modern methods of construction is a wide tent. It covers prefabrication and modular, but the ABCB has also used it to describe 3D printing, robotics and artificial intelligence in building. Prefabricated construction is narrower and more concrete.

Narrowing is not necessarily a retreat. A definition that tries to capture every emerging technology is a definition that captures nothing usable, and a scheme built on it would be arguing about scope for a decade. Tightening the frame to something you can actually write rules against is how these things get delivered.

But it does mean the scope question is live in this round, and if your business model sits at the edge of what most people mean by prefabricated, the proposed definition is the document to read first.

Why a Definition Is the Load Bearing Part

Builders tend to treat definitions as lawyer work. In this case the definition is the whole game.

Right now, whether a factory-built system gets waved through or picked apart depends heavily on which certifier looks at it and which state it lands in. The same wall cassette can be routine in one jurisdiction and a project stopping conversation in another. That inconsistency is not usually a quality problem. It is a language problem. There is no shared, legally anchored answer to what the thing is.

This is the same friction that shows up when Australian builders assess offshore supply. Working out whether an imported module actually meets Australian code is hard partly because there has never been a national reference point to measure it against.

An NCC definition creates that reference point. It also creates a boundary. Systems inside the definition get a pathway. Systems outside it keep doing what they do now.

How This Got Here

The through line is easy to follow if you have been paying attention.

Building Ministers directed the ABCB to look at regulatory improvements for prefabricated and modular housing in early 2024. The Commonwealth allocated $54 million to prefabricated and modular housing in the 2025-26 Budget, with $4 million of that funding the ABCB to develop projects aimed at reducing barriers to modern construction methods. An issues paper went out in July 2025 and closed that August. The ABCB then said publicly that consultation on the draft framework would come in 2026.

It has. Alongside that, the national voluntary certification scheme was written into the federal housing plan as one of the mechanisms for simplifying NCC approval of prefabricated housing.

The economic case being made is not modest. The Productivity Commission has reported that prefabricated and modular construction can reduce the cost of homes by up to 20 per cent and that these homes can be built up to 50 per cent faster than traditional methods. The Productivity Commission has also identified that regulatory reform enabling greater use of these methods could deliver a $2.9 billion to $5.7 billion boost to the national economy. Against that, modular currently accounts for about 5 per cent of the sector in Australia. The gap between those two numbers is the entire policy argument.

The Timeline Is the Thing Nobody Wants to Talk About

The ABCB has said the scheme is expected to be available for manufacturers by mid-2028, and has been clear that this timing is indicative and may change following further consultation.

Mid-2028 is two years away. For a manufacturer weighing a factory investment, or a builder deciding whether to build a modular capability into their delivery model, that is a long runway on a voluntary scheme whose rules are still in draft.

It is worth being honest about what that means. This scheme will not solve anyone’s approval problem this financial year. It will not solve it next financial year either. What it will do, if the definitions land and the states adopt them consistently, is remove a structural cost that has been holding the sector at 5 per cent for a decade.

That is a slow fix to a slow problem. It is also the only kind of fix that lasts.

The States Are Not Waiting

The national scheme is being built while jurisdictions run their own plays, and the two do not always move at the same speed.

New South Wales has legislation before Parliament that would formally recognise prefabricated buildings in law, has directed funding toward a state regulatory framework and certification system, and has opened grants to help manufacturers certify systems for mid and high rise. Other states have their own modular programs and procurement pipelines.

This is the risk the national scheme exists to manage. If jurisdictions each build their own certification pathway while the national one is still in consultation, the industry ends up with the fragmentation the scheme was designed to remove, and manufacturers pay for it twice.

Whether that happens depends partly on how well the national definitions are drafted, and partly on whether the states choose to align. Consultation is the only formal point at which industry gets a say in the first of those.

What Builders Should Actually Do

The honest answer for most residential builders is: nothing operational, and one thing strategic.

Nothing operational, because the scheme is voluntary and two years away. Existing methods of demonstrating NCC compliance remain valid. Nobody needs to change a process this week.

The strategic thing is smaller and more useful. If prefabricated or modular systems are part of your delivery model now, or a plausible part of it by 2028, read the proposed definition and check whether the systems you use or supply sit inside it. That is a half hour of reading that tells you whether this scheme is built for you or around you.

Manufacturers and suppliers have the sharper interest. Draft Scheme Rules are where audit burden, evidence requirements and cost recovery get set. The scheme has been described as self-funded and operating on a cost recovery basis, which means the participants pay for it. If the compliance burden is set wrong, the smaller manufacturers wear it hardest, and the only time to say so is now. The scheme is meant to lift building quality and delivery method across the sector, which only works if the businesses doing the building can afford to be in it.

Submissions close 15 September 2026. The ABCB has said it welcomes input from industry, regulators and the broader community.

The Point

Every consultation round on this scheme has been an opportunity to shape it, and every round has been dominated by the same handful of large voices while the rest of the industry waited to be told what happened.

This is the round where the rules get written. After this, the conversation moves from what should the scheme be to why does the scheme work like this, and the second conversation is much less productive than the first.

Prefab has been ten years away for about fifteen years. The reason has never really been the technology. It has been that nobody could agree on what the thing was called, who signed off on it, or who carried the risk when it arrived on a truck. This consultation is an attempt to answer all three.

It might not work. Plenty of well-intentioned reform has stalled between a draft framework and a state adoption schedule. But an industry that does not turn up to the drafting does not get to be surprised by the draft.

The Good Builder Take

Two years out and voluntary means this is not an urgent read for most builders. It is an important one for anyone with skin in prefab. The definition is the part that matters, because a definition written without you is a definition that eventually gets applied to you. Read the proposed definition, check whether your systems sit inside it, and if they do not, say so before 15 September rather than after mid-2028.

The bigger test is not the consultation. It is whether the states hold the line on national consistency once they each have their own modular program to protect. That is the part worth watching.

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Last updated: 16 July 2026

This article is intended for general information purposes only and does not constitute legal, financial, or professional advice. Laws, regulations, and industry requirements vary by state and territory and change over time. Builders and trades professionals should seek independent advice relevant to their specific circumstances before making business, legal, or financial decisions.

Author: TGB Editorial