The Next Construction Shock Isn't Coming. It's Already in the Pipeline.

I see what construction actually costs. Not what it was quoted at. What it actually cost when the project was done.

Fuel stations are already running dry. Diesel is above $3 a litre in parts of this country. And we are just at the start of this.

What is coming through the construction supply chain has not yet been fully priced into a single feasibility model, contract, or budget being prepared today.

The narrative is wrong

The headline figures suggest construction cost escalation is moderating. Four to six percent is the number being quoted. Stabilisation is the word being used.

I understand why that narrative exists. It is what the data from three to six months ago supports.

It is not what the final accounts of completed projects are telling me.

The gap between budgeted cost and final account has been widening. Projects that were assessed as viable at commitment are landing materially above their original numbers. That pattern has no parallel outside of the post-COVID period. And unlike the post-COVID period, this one has a trigger that is still escalating.

The reported numbers are looking backwards. The risk is building forwards.

Fuel is not a line item. It is the foundation.

Fuel is not one cost pressure among many. It is the input that sits beneath every other input in construction delivery.

Raw material extraction runs on diesel. Manufacturing runs on energy. International shipping runs on bunker fuel. Domestic freight runs on diesel. Every piece of plant on every site in this country runs on diesel.

Petrol prices have risen roughly 50 cents per litre since late February, triggered by the effective closure of the Strait of Hormuz following the escalation of conflict in the Middle East. That single chokepoint handles approximately one fifth of the world's daily oil supply.

We have already seen service stations running out of fuel. Diesel is already above $3 a litre. Supply tankers are being cancelled or deferred. And the government's own advice is that the situation will require continued crisis response for as long as the conflict continues.

This is not a cost spike. This is a structural disruption to the energy inputs that underpin every layer of construction delivery.

When fuel moves at this scale it does not add cost once. It multiplies across every stage of the supply chain. And that compounding effect is only partially visible today. What is working through the pipeline will be significantly worse.

Australia imports roughly 90 percent of its liquid fuel and holds just 36 days of diesel supply. We are one of the most fuel-import-dependent developed economies in the world. That vulnerability is no longer theoretical.

The pipeline effect: the real increases have not arrived yet

This is the part that is being almost entirely missed in current commentary.

Construction operates on significant time lags. The materials being installed on sites today were priced months ago, ordered weeks ago, and in many cases shipped before the current fuel shock took hold.

What is now entering the supply chain was produced and transported under materially higher fuel and freight costs. As existing inventory is depleted and new shipments arrive, the market reprices. Broadly and across categories.

What I see in completed project final accounts reflects the cost of inputs at the time they entered the supply chain. The projects completing in six to twelve months are carrying costs that have not yet fully appeared in any current quote, index, or escalation report.

Major freight operators have already flagged surcharge increases, with analysts projecting these to filter through within four to eight weeks. Construction supply chains run considerably longer than that.

This is not speculation. It is a pipeline effect. It is how supply chains work. And it typically plays out over a two to six month window from the point of the original shock.

Projects being assessed and contracted right now are using cost assumptions that will not survive that repricing.

The fixed-price contract problem

As a quantity surveyor this is where I want to be particularly direct.

The industry has frameworks for dealing with steady, predictable inflation. It does not have effective frameworks for dealing with volatility.

Builders are regularly locked into fixed or semi-fixed contracts. Their input costs are not fixed. When those inputs move unexpectedly and sharply the consequence is not margin compression. It is margin reversal.

There were 3,596 building industry insolvencies in 2025 alone, before this fuel shock hit. Those were businesses that entered contracts in good faith, based on cost conditions that subsequently moved against them. We are now creating conditions for a second wave of exactly the same outcome, for businesses currently signing contracts based on pre-crisis inputs.

The mismatch between fixed contract obligations and unfixed input costs is not a contractor problem. It is a systemic one. And it is being underestimated right now.

Feasibility models are carrying risk they have not accounted for

Many current feasibility models assume stable escalation rates. They assume predictable procurement outcomes. They assume that risk can be adequately transferred through contract structures.

All three of those assumptions are weakening simultaneously.

The HIA has warned that sustained fuel price increases could add between $8,000 and $15,000 to the cost of building a new home. That figure reflects direct impacts only. It does not capture the compounding effect of higher-cost inputs working through the supply chain over the months ahead.

The more relevant questions for any project being assessed today are these:

• What costs are already embedded in the supply chain but not yet visible in any current quote?
• How much pricing volatility can this project absorb before it becomes unviable?
• Where does risk genuinely sit once contracts are signed, not where contracts say it sits?

Projects that look viable today may not be viable at delivery. That gap between approved assumptions and delivered reality is growing. And it will continue to grow as higher-cost inputs move through the pipeline.

This tightens into a capacity problem, not just a cost problem

The cost impact is real. But the downstream consequence that concerns me more is what happens to market capacity.

As volatility increases, rational contractors price more conservatively. Some decline to price at all. Others exit the market entirely, particularly in the residential segment where margins are thinnest and contract terms offer the least protection.

The Urban Development Institute of Australia is already forecasting a shortfall of 380,000 dwellings by 2030, with an 11 percent drop in housing production projected for 2026. That forecast predates the full impact of this fuel shock.

The loop that follows is predictable. Higher risk reduces the number of contractors willing to participate. Fewer participants drives prices higher. Higher prices reduce project feasibility. Reduced feasibility further shrinks the pipeline. This is how a cost shock becomes a supply constraint. And a supply constraint in Australian housing right now is a crisis layered on top of an existing crisis.

What should be happening now

There are specific things that project owners, developers, and their advisers should be doing right now rather than waiting for the market to settle.

Stop treating escalation rates from six months ago as current. They are not. Any feasibility assessment or budget prepared before February 2026 should be reviewed against current supply chain conditions before any further commitments are made.

Understand where cost risk actually sits in your contracts. Where agreements purport to transfer escalation risk to contractors, pressure-test what that means in a market where contractors cannot absorb it. The risk does not disappear. It migrates to project viability and contractor solvency.

Build for a two to six month repricing window in any project planning underway now. The supply chain reset from a shock of this magnitude does not happen quickly. The final accounts of projects completing later this year will reflect costs that do not yet appear in any current index or quote.

The construction industry is not stabilising

The current public narrative around construction cost moderation is not accurate. It reflects lagging data from conditions that no longer exist. It is giving false confidence to decisions being made right now that carry real financial consequences.

Fuel stations are running dry. Diesel is above $3 a litre. Supply tankers are being cancelled. And we are just at the start of this.

The industry is not moving into a period of stability. It is moving into a period of heightened volatility that is not yet fully priced into the feasibility models, procurement strategies, or contract structures being used right now.

The shock is in the pipeline. The repricing is coming. And the decisions being made today will determine who is positioned to absorb it and who is not.