Steel Frames
Open any construction cost conversation in 2026 and the first thing out of someone’s mouth is “material prices.” It is the easiest driver to point at, the easiest to track, and the one that gets the most airtime. It is also, now, the least complete explanation for what is actually happening on Australian construction P&Ls.
The paradox: the Cordell Construction Cost Index posted its smallest annual rise since March 2002 in the year to December 2025, at +2.5% (Cotality, January 2026). Timber, PVC and some other input prices moderated through parts of 2025. And yet. ABS Producer Price Index data for the June 2026 quarter shows house construction output prices rose 5.9% over the year, the strongest annual rise in several years, with Q2 2026 alone posting a 2.0% quarterly rise, the largest since September 2022 (ABS Producer Price Indexes, June 2026). Builders are watching their quoted costs climb while material cost sheets suggest things should be cooling.
The explanation sits in the drivers you do not see on the materials invoice. Labour, time, compliance, rework, insurance, finance, and the compounding effect they all have on each other. This blog walks through them one at a time, in the order they actually show up on a project, and shows which ones a builder can control and which ones are market level forces to be managed around.
To understand the paradox properly, the key is to separate three different measures that often get collapsed in cost conversations:
Input prices. What it costs to buy the materials and components that go into a house. These are the numbers that moved sharply during COVID and that are now easing in some categories.
Output prices. What a builder actually sells a completed house for. This includes materials, labour, overheads, compliance, financing, risk premium and margin.
Cost indices. Composite measures (Cordell, RLB tender price, ABS PPI) that track movement over time at different levels of aggregation.
The June 2026 quarter ABS release tells the story in one line: input prices to house construction rose 2.1% in the quarter and 3.8% over the year, while house construction output prices rose 2.0% in the quarter and 5.9% over the year (ABS Producer Price Indexes, June 2026). Output is rising faster than input, by a wide margin. The gap is the labour, time, compliance, risk and other costs that are not on the materials invoice.
The multi year context sharpens the picture:
Whichever measure you pick, costs are still rising, even as material cost sheets look calmer than they did in 2022. The question is where the extra pressure is coming from, which is what the rest of this blog unpacks.
Two cost drivers dominate the public conversation on construction cost. Both are real, both matter, and both are also incomplete explanations when examined on their own.
Materials. Cement product prices rose 5.2% in the year to January 2026, and ceramics by 2.6% in the same period (Master Builders Australia, January 2026). Copper broke through USD $13,000 a tonne early in 2026, driven by electrification, grid upgrades, renewables and the data centre boom. Copper and aluminium drove the largest rise in metal products in the ABS data, which fed straight into electrical cable and conduit prices (ABS PPI data via The Good Builder). Some other materials, including timber and PVC, have eased somewhat from their 2022 peaks. The net effect on the input price index is a 3.8% annual rise, not a fall.
Trades. The Housing Industry Association’s Trades Report shows trade prices rose 5.1% in the first half of 2026, the fastest half year rise since the 2022 post pandemic skills crisis peak (HIA, via Building Connection). The sector employed a record 1.37 million workers in February 2026 and still could not fill 21,600 vacancies, with 13 of 15 core residential trades in national shortage (Jobs and Skills Australia, via MPA). Bricklaying, ceramic tiling, roofing and carpentry are the worst affected.
Master Builders Australia’s chief economist Shane Garrett summarised the combined dynamic in January 2026: “House building costs had been decelerating for much of 2025, but those days are history. Recently, we have seen an escalation in the cost of home building materials while continued labour shortages magnify the damage” (MBA, 30 January 2026).
These two drivers alone would explain a few points of annual cost rise, but not the full 5.9% output price rise on housing. For that, you need the invisible drivers.
These are the cost drivers that do not show up on a materials invoice and often do not get their own line in the budget. They sit inside labour hours, inside the lead time, inside the insurance renewal, and inside the variations register. For a builder trying to understand why a project is coming in higher than the material cost sheet would suggest, this is where the gap lives.
Longer build times translate directly into higher costs, even if nothing else changes. Every extra week on site is extra labour, extra site establishment, extra supervision, extra holding costs on the land, and extra interest on construction finance. The Productivity Commission’s 2025 research paper, Housing construction productivity: Can we fix it?, found that physical productivity in housing construction has fallen 53% over the last 30 years, meaning Australia is building roughly half as many homes per hour worked compared to 1995. Labour productivity in housing construction is down 12% over the same period, while the broader economy’s labour productivity rose 49%.
Master Builders Australia’s analysis puts the current output per hour by a construction worker at 20% lower than it used to be (MBA Senate Committee opening statement, April 2026). That is not a materials problem. It is a hidden multiplier on every project cost line that touches labour.
The cost of complying with the National Construction Code, state planning rules, Cladding Safety Victoria, bushfire attack level provisions, 7 star NatHERS energy efficiency standards and other regulatory requirements has grown steadily, and most of it sits outside the materials conversation.
The Productivity Commission has estimated that regulatory burden can cost up to $320,000 per project in some circumstances (via King and Wood Mallesons analysis). On a smaller residential build, the per project cost is much lower, but even an additional 1 to 2% of project value in compliance related design, documentation and testing adds up over a year’s work.
The collapse of thousands of builders through 2022 to 2026 has reshaped the risk profile of the entire industry. Australia recorded 3,472 construction company insolvencies in the year to 30 June 2026, representing 24.5% of all Australian company insolvencies (ASIC data, via QUT analysis). Insurers, lenders and suppliers price that risk back into every active builder’s cost structure through higher insurance premiums, tighter payment terms, and in some cases bank guarantees that lock up working capital.
Finance costs are the other half of this. Australia’s cash rate sat at 4.35% through 2026 (Reuters, August 2026), well above the pre pandemic baseline, and construction finance carries its own margin on top of that. Every month a project runs over costs more in interest than it would have in 2019.
The gap between what gets designed and what gets built is where a surprising share of real project cost accumulates. Rework in Australia and New Zealand was estimated at $14.2 billion in 2018 (Access Group), with research cited by Procore suggesting rework can run up to 5% of contract value on individual projects, and earlier studies putting as much as 30% of all construction work as rework.
Uncontrolled variations commonly cause cost overruns of 15 to 30% beyond the original contract price (Contracts Specialist, NSW). FMI and Autodesk’s Construction Disconnected research found that poor project data and miscommunication drive close to half of all rework on construction projects (via Plexa). A commercial build can carry 200 to 2,000 live drawings across architectural, structural, hydraulic, electrical and fire disciplines (ISO 19650 ANZ Guide 2019, via Plexa), and every revision mismatch is a potential rework event.
This is why the Productivity Commission’s recommendations around removing barriers to modern methods of construction (MMC), including prefabrication and modular, are a cost conversation as much as a productivity one. BIM coordinated prefab means fewer clashes to resolve on site, fewer rework crews, and fewer variations to argue over at claim time.
The tendency when looking at cost drivers one at a time is to assume they are additive. In practice they compound each other on real projects. A worked example makes this clear.
Take a hypothetical multi unit project in Melbourne priced in early 2025, with a planned 10 month build programme. By the time it is tendering again in late 2026, the following has happened:
Individually, none of these numbers look alarming. Stacked, the project is coming in 15 to 20% higher than its 2025 price, with maybe 4 points of that coming from pure material cost and the rest from the hidden drivers.
The reason the compounding matters is that the drivers reinforce each other. Longer build times mean more exposure to trade price rises mid project. More rework means more disputes and higher professional indemnity premiums. More complex compliance means more variations as rules are interpreted on site. A builder who optimises for one driver and ignores the others sees modest savings swallowed by the ones they left alone.
Master Builders Australia’s chief economist Shane Garrett was blunt about this dynamic in April 2026: “It won’t surprise anyone that longer delays magnify building costs. The cost of building a new house is now 47 per cent more expensive than it was right [before the pandemic]” (MBA opening statement to Senate Committee on Productivity, April 2026).
Some drivers are genuinely external market forces. A builder in Melbourne has no influence on copper prices, cash rates, or the pace of federal regulatory change. Other drivers respond directly to builder choices. Separating the two matters, because it changes where management attention actually pays off.
External, market level drivers (manage around them):
Partially controllable drivers (influence through supplier and contract choices):
Builder controllable drivers (direct choices on each project):
The practical implication is that builders who focus only on negotiating harder with suppliers on material prices are fighting a battle where the leverage is small and the counterparty often has limited room to move. Builders who focus on time, rework, variation volume and trade dependency are working on the drivers where their decisions actually move the needle, and where the compounding effect works in their favour instead of against them.
Of all the discretionary choices on a project, the one that touches the most cost drivers at once is the structural frame. It is also the choice that gets made relatively early in design, which means its downstream effects compound through the whole build.
A prefabricated light gauge steel frame, specifically, hits several drivers in parallel:
Not every project will capture every one of these benefits in the same proportion. But across most residential, multi unit, commercial, industrial, NDIS and childcare projects, a prefabricated LGS frame touches more cost drivers at once than almost any other single decision a builder makes. Our pricing guide, how much steel framing costs in Australia, sets out the direct cost comparison in more detail.
CMC Steel Solutions sits inside the structural frame cost lever described above. The specifics that matter for how we affect project cost drivers:
Detailed quotes at the outset. Our estimators produce a value for money quotation that is inclusive of all construction elements and an estimated lead time, with delivery to site at no additional cost and all necessary erection drawings included. Scope gaps that commonly generate variations later are closed at the quote stage. This directly reduces the variation driver.
3D BIM modelling before fabrication. Every clash between frame, services and cladding is resolved in the office. This cuts rework on site and compresses the critical path. More on this in our guide to how 3D BIM modelling works in steel frame construction and why it matters.
In house CNC fabrication at Craigieburn. Dimensionally accurate, factory produced components reduce field variability and rework. The capacity is weather independent, which protects programme and holding cost lines.
Reg 126 certification on completion. The structural frame inspection and reg 126 certificate remove an iteration between builder and certifier, saving documentation and compliance time.
Numbered, bundled, sequenced delivery. A smaller install crew replaces a larger carpentry team, which reduces exposure to the carpentry trade shortage specifically. Fewer trade handovers also means fewer delay risk points on the critical path.
For builders working through a project cost diagnostic that looks like the one above, CMC Steel Solutions is the frame supplier whose cost position is built around the drivers that are hardest to attack any other way. The prefab steel frame and areas we service pages set out the full operating footprint across Melbourne and wider Victoria.
A quick reference view of the cost drivers covered above, ranked by their typical annual impact on a Melbourne residential or commercial build in 2026, with notes on controllability and the single highest leverage lever a builder has for each.
Driver | Typical annual impact | Builder control | Highest leverage lever |
|---|---|---|---|
Trade prices (labour) | 4 to 6% | Partial | Reduce dependency on scarce trades through prefab framing |
Material input prices | 2 to 4% | External | Lock pricing with suppliers at tender; use steel for predictability |
Build time and productivity | 2 to 4% | Direct | Method choice (prefab, modular, panelised) |
Compliance and regulation | 1 to 2% | External | Early design engagement; experienced consultants |
Rework and variations | 2 to 5% | Direct | 3D BIM coordination, complete scopes, fabrication ready documentation |
Risk, insolvency and insurance | 1 to 2% | Partial | Strong track record, robust documentation, Reg 126 certification |
Finance costs | 1 to 2% | External | Shorten build time to reduce exposure |
Design to site friction | 1 to 3% | Direct | Model based shop drawings, prefab componentry |
The pattern that falls out of this view is the one most builders already sense: the biggest controllable gains are in trade dependency, build time, rework and design to site friction. All four respond to the same underlying shift, which is moving work off site, into BIM coordinated prefab, with factory precision replacing field variability.
Sources: ABS Producer Price Indexes June 2026; HIA Trades Report June quarter 2026; Productivity Commission 2025; UNSW research via LSF Association; ASIC insolvency data; MBA Senate Committee opening statement April 2026.
Some are, some are not. Timber and PVC have eased from their 2022 peaks. Cement, ceramics, copper and aluminium are still rising, and the ABS Producer Price Index for input prices to house construction rose 3.8% in the year to June 2026. So material prices as a whole are not falling, they are moderating in parts of the basket while rising in others.
Fixed price contracts signed pre or during COVID, locked against rising input and labour costs, have been the primary driver of builder collapse. 3,472 construction companies went into external administration in the year to 30 June 2026, 24.5% of all Australian company insolvencies. Strong demand does not help a builder absorbing losses on a contract priced to an older cost base.
HIA’s Trades Report (June quarter 2026) ranks bricklaying as the most severe shortage, followed by ceramic tiling, roofing and carpentry. Trade prices rose 5.1% in the first half of 2026, the fastest half year rise since the 2022 peak.
Yes. The Productivity Commission has estimated regulatory burden at up to $320,000 per project in some cases. On a typical residential build the per project cost is lower, but ongoing additions to the National Construction Code, state energy and cladding provisions, and bushfire assessment requirements have added 1 to 2% of total cost over recent years.
On comparable scope, Australian research consistently shows yes. The UNSW Dapto study found around 39% cost savings for prefabricated LGS panels against on site steel framing on non load bearing walls, with install time cut from 13 days to 4 days. On whole project cost the picture depends on repetition and programme pressure, but prefab usually at least competes on direct cost and wins meaningfully on compounded cost (time, rework, variations).
Method choice at the design stage. Framing material and construction method shape labour exposure, time, rework rate, compliance path and insurance risk simultaneously. More leverage sits in that decision than in any individual tender negotiation line.
Not usually. Incomplete scopes, missing engineering, excluded installation and omitted delivery are common ways low quotes become expensive through variations. For a deeper look at this specific trap, our upcoming blog on the hidden cost of “cheapest price wins” tenders covers it in detail.
If you want to understand how a prefabricated steel frame would reshape the cost profile of a specific project you have on the board in Melbourne or wider Victoria, CMC Steel Solutions can walk through the numbers against your current baseline. Call us on 1300 285 566, email info@cmcsteelsolutions.com.au, or get in touch online and we will take you through the direct and compounded cost implications for your project.