How could new building methods change construction in Australia?

Australia builds homes more slowly, per hour of work, than it did thirty years ago, and new building methods are often offered as the way out. Prefabrication and 3D concrete printing are the two most discussed. The evidence that they speed up building at scale, cut cost or lower whole-of-life emissions in Australian conditions is still limited, and much of what is public comes from the companies selling the methods.

This article separates what has been measured, what is a company claim, and what is a forecast. It covers houses and low-rise buildings. It does not assess construction robotics or AI-assisted design and site management, which we have not yet researched (see the end of the article).

The problem the new methods are meant to solve

The Productivity Commission's research paper Housing construction productivity: Can we fix it?, released on 16 February 2025, reports that Australia completes about half as many homes per hour worked as in 1995. After adjusting for the larger size and higher quality of new homes, labour productivity in housing construction fell by 12%, while labour productivity across the wider economy rose by 49% over the same period. The paper also reports that the average residential building firm employs fewer than two people (Productivity Commission, 2025).

These are measured findings from a government research body, although productivity measures for construction are hard to build and the quality adjustment involves judgement. The paper does not say new building methods will fix the problem. It recommends removing barriers to new techniques such as modular housing, speeding up approvals, and an independent review of the National Construction Code, which it says has never been comprehensively reviewed and parts of which likely raise costs more than necessary (same source). We read the Commission's media release for this article, not the full paper, so section-level detail should be checked against the paper itself.

Prefabrication and modular building

Prefabricated and modular construction means making parts of a building, or whole modules, in a factory and assembling them on site. Factory work can be repeated, planned and protected from weather. Whether it is faster or cheaper overall in Australia depends on the project and on how well design, approvals and transport are matched to it.

What we can say from sources we read:

• The Productivity Commission names modular housing as an example of a technique facing barriers, but the release we read gives no figures for its speed or cost.
• The Australian Building Codes Board (ABCB) is developing a National Voluntary Certification Scheme for manufacturers of modern methods of construction. Its stated purpose is a consistent national approach, because existing certification and inspection arrangements were designed for work done on site. The ABCB's page says the scheme is due to start in mid-July 2028 and was at issues-paper stage, with feedback closing on 29 August 2025 (ABCB, 2025). This is a plan, not a result, and dates may have moved.
• A University of Melbourne article, published on 5 May 2026, says modular construction is less than 5% of Australian building output, and names inconsistent state regulation, different treatment by lenders and an industry of many small firms as barriers (Vipulananda, 2026). This is a commentary article, not a primary dataset. We have not found the underlying statistic and treat the figure as indicative only.

We found no independent Australian study in the sources read that compares total cost, time and emissions for prefabricated and conventional homes built to the same design. That comparison is the missing piece.

3D concrete printing

3D concrete printing builds walls layer by layer from a computer-controlled nozzle. It is used for walls and some structural elements. Other parts of a house, including roofs, services and fit-out, are still built conventionally.

A company claim, not a finding. In February 2025 the company LUYTEN announced a multi-storey 3D-printed home in outer Melbourne, which it expected to finish in five weeks against a usual eight to eleven months. The same release says 3D concrete printing reduces waste by 60%, production time by 70% and labour cost by 80% (LUYTEN press release via AAP, 2025). These are the company's own statements. We found no independent verification of them, and the "five weeks" figure appears to describe printing and assembly, not design, approvals, site works or fit-out. Treat all of these as unverified.

What peer-reviewed work says about emissions. A systematic review of life cycle assessments of 3D concrete printing found that it is associated with a significant reduction in global warming potential compared with conventional construction using ordinary Portland cement concrete. The authors also say the durability of printed structures could be improved with non-traditional materials, and that printer energy efficiency and structural design affect the result (Motalebi, Khondoker and Kabir, 2024). We read the abstract only. Reviews like this combine studies with different boundaries and assumptions, so the headline direction is more reliable than any single percentage. Printed mixes can contain more cement than conventional ones, so results depend on the mix, and the comparison may be with a different building design.

For the background on what embodied carbon counts and how to test a lower-carbon claim, see What is embodied carbon, and which building choices can reduce it?.

Why whole-of-life matters more than build speed

A faster build is a gain for owners and for housing supply. It is not, by itself, a gain for the climate or for running costs.

• Upfront carbon. The materials, not the speed, drive most of the construction-stage emissions. UNEP's 2024–25 global status report says buildings account for 32% of global energy use and 34% of global CO2 emissions, with materials such as cement and steel responsible for 18% of these emissions (UNEP, 2024–25 key messages). We read the key messages only, which do not state the data year or whether the 18% is a share of the 34% or of total emissions. An earlier edition reported different figures (34% of energy demand and 37% of energy and process-related CO2 in 2022, UNEP), because editions use different years and boundaries. Do not mix them.
• Operating energy. A building's heating, cooling and appliance use runs for decades. A fast, cheap shell that performs poorly in use can cost more over its life. Energy performance is set by design, insulation, glazing and equipment, which any construction method can get right or wrong. See Better Buildings and Energy & Storage.
• Durability, repair and end of life. Factory-made modules and printed walls can be hard to alter or repair if designed as one-offs. Whether they can be disassembled and reused is a design question we found no Australian evidence on.

Where the forecasts are

Some commentators forecast a large shift to factory production and automation within a decade or two. We have not found a rigorous Australian forecast of how quickly any of these methods will scale. The ABCB scheme start date of mid-2028 suggests that national certification, at least, will not be in place for a few years. Forecasts like this are scenarios resting on assumptions about regulation, finance, skills and demand, not findings. For how we label forecasts, see Future & Foresight.

Questions worth asking

• Is a speed or cost claim for the whole project, or only for one stage such as printing walls?
• Who measured it, and is the comparison with a building of the same size, design and performance?
• What is the cement content or materials mix, and is there an independent life cycle assessment?
• Does the design meet current energy requirements, and can it be repaired, altered or dismantled?
• Would the same money and time have gone further on design, orientation and insulation?

What we have not yet assessed

• Construction robotics and automation on site. We searched for evidence on robotic bricklaying and similar systems but have not read primary sources, so we make no claims about them.
• AI in design, scheduling and site management. Not yet researched.
• Advanced and low-carbon materials such as engineered timber and alternative cements, beyond the general embodied carbon background linked above.
• Cost. We found no independent Australian cost comparison.

Studies at a glance

About this article

Circular Abundance wrote this from the sources linked above. We have not tested anything ourselves, and we read several sources only in part, as the table notes. This is an early draft that has not yet had the separate checking pass our other articles had. Methods, rules and company projects change, so check current information before acting.