Construction Costs Soaring 'Like COVID Again': How Middle East Supply Shocks Are Hitting Australian Home Building in 2026

The COVID Déjà Vu Nobody Wanted

If you’re planning to build a home, renovate, or invest in new construction in 2026, brace yourself. Australian builders, suppliers, and developers are sounding alarms that haven’t been this loud since the pandemic-era supply chain chaos of 2021-22.

The trigger this time isn’t a global health crisis. It’s the escalating conflict in the Middle East, specifically Iran’s actions around the Strait of Hormuz, a narrow waterway that carries roughly 20 per cent of the world’s crude oil. The flow-on effects are hitting Australian construction sites hard, fast, and from multiple directions.

“The last time we had an impact like this was the beginning of COVID,” Andrew Skinner, who owns a quarry near Sydney supplying fatty sand for bricklaying, told the ABC in March 2026. “We’ve got this sudden price increase. A great deal of uncertainty on supply and pricing.”

This article breaks down exactly what’s happening, which materials are affected, how much costs are rising, and what it means for anyone building, buying, or investing in Australian property this year.

What’s Driving the Cost Surge

The Strait of Hormuz Chokepoint

The Strait of Hormuz sits between Iran and Oman at the mouth of the Persian Gulf. Around 20 per cent of the world’s crude oil passes through this narrow strait daily. Iran’s military activity in the area has disrupted shipping routes, driving global oil and fuel prices sharply higher.

For Australia, a country that imports around 90 per cent of its refined fuel, the impact is immediate. Diesel prices at the bowser have surged, and the flow-on effects reach every corner of the construction industry.

Diesel: The Hidden Cost in Every Material

Most Australians don’t think about diesel when they think about building a house. But diesel powers virtually every step of the construction supply chain:

• Quarries and mines that extract sand, gravel, and aggregate
• Trucks that deliver materials to building sites
• Heavy machinery on construction sites (excavators, cranes, loaders)
• Manufacturing plants that produce bricks, concrete, and steel
• Ships and freight that import materials from overseas

When diesel prices spike, every single material gets more expensive. Andrew Skinner’s quarry near Sydney, for example, relies on diesel for about 20 per cent of its operating costs. His sand has already gone up more than 5 per cent due to an emergency fuel surcharge, and that’s just one input in a long chain.

Emergency Fuel Levies Are Spreading

Across Australia, building material suppliers are introducing “emergency fuel levies” to cover surging transport and production costs. These levies are being applied to:

Central Victorian builder Bradley Vagg told the ABC that “anything that pretty much comes on a truck and needs to be freighted to site has gone up in price due to the fuel.” For builders locked into fixed-price contracts, these unexpected cost increases are eating directly into margins.

The PVC and Plumbing Crisis

Force Majeure Declarations

Perhaps the most alarming development is in the plumbing supply chain. Asian manufacturers that produce petrochemicals (the raw materials for PVC pipes, fittings, and resin) are declaring force majeure. This legal term means extraordinary circumstances allow parties to break existing contracts and raise prices significantly.

The reason? Crude oil is a key input in petrochemical manufacturing. With Middle East oil supply disrupted, these manufacturers simply cannot produce at previous prices, and in some cases, cannot produce at all.

Australian Pipe Manufacturers Sound the Alarm

The impact is flowing directly to Australian companies. Polypipe, a major supplier, has warned customers that “spot PE resin pricing for April 2026 delivery is up approximately 40 per cent compared with March.” That’s not a gradual increase. That’s a shock.

Vinidex, another major manufacturer and supplier of advanced pipe systems in Australia, confirmed the disruption in a statement: “We have advised our customers that we expect considerable disruption to our supply capability over the coming weeks and months.”

For builders and developers, this means:

• Quoted prices for plumbing materials may no longer be valid as suppliers update pricing
• Lead times for pipe delivery could blow out from weeks to months
• Ground works and plumbing rough-ins may face delays on residential and commercial projects
• Cost overruns on fixed-price contracts will hit builders’ bottom lines

What This Means for New Builds

Plumbing is one of the earliest trades on a residential building site. If pipes aren’t available or prices have jumped 40 per cent, it can delay the entire build timeline. For a typical new house, plumbing materials might represent $15,000 to $25,000 of the total build cost. A 40 per cent increase on resin-based products could add $3,000 to $6,000 or more to a single home build, and that’s before factoring in labour cost increases.

Steel Prices: Another Pressure Point

Steel is a critical input for nearly every residential construction project in Australia, from structural beams and reinforcing bars to roofing and wall framing in steel-framed homes. The Australian Financial Review reported in March 2026 that major steel suppliers are passing on significant price increases driven by higher energy and freight costs.

Australia produces some domestic steel (primarily through BlueScope’s Port Kembla steelworks in NSW), but also imports substantial volumes. Both domestic production and imports are affected:

• Domestic steel is more expensive to produce because energy costs have risen
• Imported steel carries higher freight costs due to disrupted shipping routes and elevated fuel prices
• Scrap steel prices have also increased, affecting recycled steel products

For a typical new house build, steel costs (reinforcing, roofing, structural elements) can represent $20,000 to $40,000 or more. Even a 10 per cent increase adds $2,000 to $4,000 to the build cost.

The Bigger Picture: Australia’s Construction Cost Trajectory

RLB’s National Forecast

The supply chain shocks are landing on an industry that was already facing cost pressures. Rider Levett Bucknall (RLB), one of Australia’s leading construction cost consultancies, released its latest forecast in March 2026 showing construction costs rising between 4 and 6 per cent nationally this year.

These forecasts were published before the full extent of the Middle East supply chain disruptions became clear. The actual cost increases could be higher, particularly for projects that rely heavily on imported materials, petrochemical-based products, or steel.

Construction Costs Since 2020

To put current pressures in context, residential construction costs in Australia have risen approximately 40 per cent since the start of 2020, according to CoreLogic’s Cordell Construction Cost Index. The average cost per square metre for a standard new house build is now estimated at $1,800 to $2,200, compared with around $1,300 to $1,500 in early 2020.

For a 200-square-metre home, that means the build cost alone (excluding land) has gone from roughly $260,000-$300,000 in early 2020 to $360,000-$440,000 today. Premium builds in capital cities can easily exceed $500,000 to $700,000 for the construction alone.

Impact on the Housing Supply Target

The 1.2 Million Homes Goal

The federal government’s National Housing Accord set a target of 1.2 million new homes over five years from mid-2024, equating to 240,000 new homes per year. The industry was already falling well short of this target before the latest supply chain disruptions.

Current completion rates are running at approximately 160,000 to 170,000 dwellings per year, creating an annual shortfall of 70,000 to 80,000 homes. The Housing Industry Association (HIA) projects that Australia will complete approximately 800,000 to 850,000 new homes over the Accord period, well short of the 1.2 million target.

Rising construction costs make the problem worse in several ways:

• Projects become financially unviable as costs exceed what buyers or investors are willing to pay
• Builder insolvencies increase as margins get squeezed on fixed-price contracts
• Development finance becomes harder to secure as banks tighten lending criteria for construction loans
• First home buyers are priced out of new builds, reducing demand for housing starts

Housing Minister Clare O’Neil met with industry CEOs in March 2026 to discuss “housing supply chain pressures arising from the conflict in the Middle East,” indicating the government is aware of the threat but has limited tools to address a global supply shock.

Builder Insolvencies: Still a Risk

Australia’s construction sector has already seen record levels of builder insolvencies through 2024-25, according to ASIC data. The latest cost pressures could push more builders to the wall, particularly those carrying fixed-price contracts signed before the Middle East disruptions began.

If you’re considering signing a building contract in 2026, it’s worth checking:

• The builder’s financial health (ASIC company searches, credit reports)
• Whether the contract includes rise-and-fall clauses that allow the builder to pass on material cost increases
• The builder’s insurance coverage (domestic building insurance protects against builder insolvency in most states)
• Progress payment structures that limit your exposure at any point during the build

What Higher Interest Rates Mean for Construction

RBA Cash Rate at 4.10%

The Reserve Bank of Australia hiked the cash rate to 4.10 per cent on 17 March 2026, its second consecutive increase. Higher interest rates affect construction in multiple ways:

For home builders: Construction loans typically carry higher interest rates than standard home loans (often 1-2 percentage points above the variable rate). With the cash rate at 4.10 per cent, construction loan rates are sitting around 7-8 per cent for many borrowers. On a $500,000 construction loan drawn down over 12 months, that’s roughly $30,000 to $40,000 in interest costs during the build phase alone.

For developers: Higher borrowing costs reduce the feasibility of new apartment and townhouse developments. RLB analysis suggests that if the cash rate reaches 4.35 per cent, total construction work done could be about $42 billion lower (down 3.5 per cent) across the 2026-27 to 2029-30 period compared with forecasts made in late 2025.

For the housing pipeline: Higher rates reduce both the demand for new housing (fewer buyers can afford to borrow) and the supply (fewer projects are financially viable). This creates a double squeeze on Australia’s housing market.

Practical Advice: What to Do If You’re Building in 2026

If You’re About to Sign a Contract

1. Understand rise-and-fall clauses. Some building contracts include provisions that allow the builder to adjust the price if material costs change significantly. These clauses protect the builder but expose you to cost blowouts. Negotiate caps on how much the price can increase.

2. Get multiple quotes. In a rising cost environment, quotes can vary significantly between builders. Getting three to four quotes gives you a better sense of what’s reasonable.

3. Lock in material selections early. If your builder allows it, locking in specific materials and suppliers early can protect you from future price rises. This is particularly relevant for steel, plumbing materials, and imported items.

4. Budget a contingency of 15-20 per cent. In stable markets, a 10 per cent contingency is standard. Given current uncertainty, consider increasing this to 15-20 per cent.

5. Check your construction loan terms. Make sure your approved loan amount includes a buffer for cost overruns. Talk to your mortgage broker about whether you can access additional funds if needed.

If You’re Renovating

Renovations face the same cost pressures as new builds, but with some additional considerations:

• Stage your renovation if possible, tackling the most critical or value-adding work first
• Consider alternative materials where prices have spiked (for example, copper piping instead of PVC in some applications, or timber framing instead of steel)
• Get fixed quotes for materials from suppliers and lock them in before prices rise further
• Be flexible on timing. If your renovation isn’t urgent, waiting 6-12 months could see some supply chain pressures ease, though there’s no guarantee

If You’re a Property Investor

Rising construction costs have implications for property investors too:

• Existing properties become relatively more valuable as the cost of building new stock increases
• Renovation costs for investment properties will be higher, affecting your return calculations
• New build investment properties may see longer completion times and higher final costs
• Depreciation benefits on new investment properties will be higher (since the building cost is higher), providing some tax offset

The Labour Shortage Underneath It All

While material costs grab the headlines, Australia’s construction sector continues to face chronic labour shortages that compound every other problem. Construction productivity fell 3 per cent in 2024-25, according to RLB data, and shortages persist across:

• Skilled trades (electricians, plumbers, carpenters, bricklayers)
• Engineers and project managers
• Site supervisors and construction managers

Limited competition among Tier 1 contractors means large projects can command premium pricing, while insolvency risks among smaller builders reduce the available workforce for residential projects.

The federal government’s migration program has been adjusted to prioritise construction trades, but training pipelines take years to produce qualified tradespeople. In the meantime, labour costs continue to rise, adding another layer to the construction cost challenge.

What Happens Next

The trajectory of construction costs in 2026 depends heavily on three factors:

1. The Middle East conflict. If the situation around the Strait of Hormuz escalates further or persists for months, fuel and material costs will continue rising. A resolution (however unlikely in the near term) would see some costs ease.

2. RBA interest rate decisions. The cash rate is at 4.10 per cent with another hike possible in May. Higher rates reduce construction activity but don’t directly lower material costs.

3. Government intervention. The federal government has already announced emergency measures to address fuel supply (temporarily lowering fuel quality standards under the Fuel Quality Act), but options for directly reducing construction material costs are limited.

For Australians planning to build, renovate, or invest in property, the message is clear: budget conservatively, get professional advice, and build in contingency for further cost increases. The construction cost environment in 2026 is uncertain, and the risks are skewed to the upside.

Find the Right Professional for Your Property Plans

Whether you’re building your first home, renovating an investment property, or navigating a construction loan in this challenging environment, getting the right advice matters more than ever. Find a verified mortgage broker, accountant, or financial adviser on WealthWorks to help you make informed decisions.