Perth Home Construction Costs in 2026: What’s Driving the Prices?

If you've recently asked a builder for a quote on a new home in Perth and felt a quiet shock at the amount quoted, rest assured you are not alone and you are not imagining it. House prices in Perth have risen nearly twice in the last five years. 

KPMG projects a further increase of 12.8 percent in 2026, a higher increase than any other capital city in Australia. A property boom is always great news for residents in a particular area, but it is not the only news being felt in the region. 

Building construction costs have risen significantly and do not seem to be going back down anytime soon. Rider Levett Bucknall (RLB) projects a 5.3 percent increase in construction cost in 2026 in Perth, higher than in Sydney and Melbourne. This is due to a market that is operating near capacity and regional projects being exposed to cost volatility. 

Knowing exactly why this is and exactly what you can do about it is the first step in building a new home that is within budget and provides exactly what you need.

What Does It Actually Cost to Build in Perth in 2026?

Before examining the drivers, it helps to know where prices sit right now.

Perth house building costs range $2,300–$4,750 per square metre for construction in 2025–26, with total project costs driven significantly by land prices that jumped 34% in a single year — pushing average block prices to around $329,000.

For a custom home on your block, $2,500 per square metre is a realistic starting point for medium-finish construction in 2026. A standard 7-star NatHERS-rated custom home of 200 square metres on a flat block starts from approximately $500,000–$640,000; a passive solar home from $640,000–$840,000.

For project homes — the more standardised volume-builder product — Master Builders WA places average costs at around $1,000–$1,250 per square metre for single-storey brick and tile of medium finish.

The gap between those figures is significant, and intentional. What sits at the upper end of the range is where boutique home builders Perth homeowners turn to for custom designs, superior materials, and a building process tailored to their specific block, family, and long-term lifestyle goals — a fundamentally different product from a volume-built project home.

Understanding which tier of the market aligns with your brief is one of the most important decisions you'll make before requesting a single quote.

Driver #1 — Labour Shortages and the Mining Sector Squeeze

In Perth's construction industry, labor is currently the main cost driver; this is a structural rather than a transient issue.

According to Master Builders WA, an extra 55,000 workers are required to finish projects in Washington on schedule. Over the past 18 months, construction costs have increased by about 30%, with labor—rather than materials—being the main cause. Construction companies are engaged in a direct bidding war for the same skilled trades as the mining industry, which has increased its workforce by 4.2%.

Perth's housing supply is still constrained due to labor shortages, increased migration, and robust economic growth, which keeps demand high on both sides of the issue.

Practically speaking, this means that skilled trades like plumbers, electricians, roofers, tilers, framers, and concreters are in short supply and are priced appropriately. In the center

What this means practically: skilled trades — concreters, framers, roofers, tilers, electricians, and plumbers — are in short supply and pricing accordingly. In the middle of a construction boom, some building companies are still struggling to survive — not from lack of work, but from lack of the workers needed to deliver it profitably.

For homeowners, this translates directly into higher labour line items in every quote, longer lead times for trade availability, and the very real risk of delays if a builder is stretched across too many simultaneous projects.

Driver #2 — Materials, Timber Supply, and the Post-COVID Hangover

Construction costs in Perth and WA have jumped by over 40% since the COVID-19 pandemic, driven by a sharp increase in both material and labour costs against a backdrop of steady housing demand.

The structural timber market in Australia remains under particular pressure — production of native hardwood has fallen sharply as several states have ended or severely restricted native forest logging, shrinking traditional supply. Demand for timber for housing and residential construction continues to rise, prompting increased reliance on domestic softwood plantations and imported sawnwood to fill the gap.

Volatility in key materials like steel, timber, and concrete is reshaping how projects are priced and delivered nationwide — and high emissions compliance and fuel costs have added pressure across regional logistics.

While material costs have partially stabilised compared to the sharp spikes of 2022–2023, they have not retreated. The new baseline is simply higher — and builders are pricing contracts to reflect that reality.

Practical tip for homeowners: Always ask your builder whether their quote is fixed-price or subject to escalation clauses. Builders are still facing cost volatility, so ensure your quote is recent and clarify whether the builder can increase prices during construction — a fixed-price HIA contract provides the strongest protection.

Driver #3 — The 7-Star Energy Rating Requirement

One significant, Perth-specific cost driver that many homeowners don't anticipate is the updated National Construction Code.

All new homes in WA must now meet a minimum 7-star NatHERS energy rating under the updated NCC 2022, which came into full effect in May 2025. Prior to this, a standard 6-star custom home in Perth cost approximately $2,100 per square metre — that baseline no longer applies.

The 7-star requirement translates to tangible specification upgrades: better insulation, higher-performance windows, more careful orientation-driven design, and improved thermal mass considerations. These are legitimate improvements that reduce running costs and improve comfort in Perth's demanding climate — but they come with an upfront cost premium that flows into every new build quote issued after May 2025.

What it adds: The step from 6-star to 7-star typically adds $15,000–$30,000 to a standard home build, depending on design complexity and materials specified.

Driver #4 — Land Costs and Site Conditions

The building price is only one part of what a new home actually costs. Land has become a formidable budget item in its own right.

The average price for a new block of land in Perth's metropolitan area now sits at $305,177 — a 25% increase over the previous year and a 9.5% gain in a single quarter, driven by scarcity of new land in Perth and neighbouring areas.

Beyond the land purchase price, the site itself can significantly influence construction cost:

• Sloping sites may require retaining walls and earthworks; sandy soil, rock, or high water tables increase foundation costs; sites with poor access make material and equipment delivery more expensive and time-consuming.

• Site conditions, design complexity, specification level, energy efficiency upgrades, and external works — landscaping, driveways, fencing, and outdoor entertaining — can each easily add 20–40% to base building costs, which explains why the per-square-metre range is so wide.

Practical tip: Before purchasing a block, commission a soil test and site assessment. A $500–$800 geotechnical report can reveal whether a site that looks affordable on paper carries $30,000–$60,000 in hidden site preparation costs.

What Can You Do to Manage Costs in 2026?

The cost environment is real — but it isn't unmanageable with the right approach:

1. Lock in early with a fixed-price contract Cost escalation clauses are common in 2026. Push for a fixed-price HIA building contract and understand exactly what variations can trigger price changes before you sign.

2. Simplify your design where it doesn't matter Custom designs require individual engineering, drafting, and approvals — standard designs cost less and still allow significant personalisation through material and finish selections. Save your customisation budget for the elements you'll interact with daily.

3. Building your contingency from day one Building in 2026 may still require a 10–20% contingency budget — factor this into your finance approval before committing, not after your first variation notice arrives.

4. Choose your builder carefully In a tight labour market, your builder's relationships with subcontractors matter enormously. A builder with long-standing trade partnerships can hold timelines and costs in ways that a less-established operator cannot.

Conclusion — The Cost Reality, and How to Navigate It

Perth's construction cost environment in 2026 is the product of genuinely structural forces: a labour market stretched between housing and mining demand, materials supply chains still recalibrating from pandemic disruption, updated energy standards, and land prices reflecting one of Australia's strongest property markets.

None of these forces are temporary, which means homeowners who plan with realistic, current figures — and build in the right contingencies — are the ones who complete their projects on budget and on time. Those who rely on outdated cost guides or optimistic estimates are the ones facing mid-build surprises.

The decisions you make at the planning stage — your builder, your contract structure, your design complexity, and your contingency — have a far greater impact on your final cost than almost anything you'll decide during construction itself.

If you're planning a new home build in Perth and want to work with experienced home building contractors who understand the 2026 market, deliver transparent pricing, and maintain the trade relationships needed to keep projects moving — Perth Handyman WA is ready to help.