Why Perth Builds Take Longer Than the National Average

What does the data actually tell us?

The data does not tell you how long your individual build will take. It tells you that older assumptions about construction time can be unreliable. A project timeline depends on the home, the site, the builder's program, trade availability, materials and the decisions made before construction starts.

Build Insight WA's view: do not use a best-case industry average as your personal construction program. Ask how your builder arrived at the timeframe they are proposing for your specific project.

Is planning approval the main bottleneck?

Not necessarily. Approval is only one part of the journey. Once construction begins, the project depends on trades, materials and sequencing. A delay to one stage can affect everything scheduled behind it.

Build Insight WA's view: when you are budgeting time, look beyond the approval date. The construction program deserves the same scrutiny as the contract price.

Why does trade availability matter?

Residential construction relies on multiple trades arriving at the right point in the sequence. If one trade is unavailable, later stages can also move. That makes a builder's trade base and scheduling process relevant before you sign, not just after construction starts.

Build Insight WA's view: ask how the builder manages trade scheduling, what parts of the program are most exposed and how delays are communicated.

Can material lead times affect the whole program?

Yes. A delayed item can affect more than its own installation date if the next trade cannot proceed without it. This is why selections and procurement decisions made well before installation can matter to the construction program.

Build Insight WA’s view:ask which items carry longer lead times and when they need to be finalised or ordered.

Why does the WA increase matter?

The 71 per cent increase reported for WA is significant because it is more than double the national increase of 34 per cent over the same FY2020 to FY2025 period. It does not mean every WA home takes 71 per cent longer to build. It shows that the broader conditions in WA moved more sharply than the national average.

Build Insight WA’s view:someone planning a Perth build should not rely on pre-pandemic expectations for how long the construction stage will take.

What should you ask before signing?

You do not need to become a construction programmer to ask useful questions.

• What construction timeframe is being proposed?
• What assumptions sit behind that timeframe?
• When does the builder consider construction to have officially started?
• Which trades or materials are most likely to affect the program?
• How are delays and changes communicated?
• What does the contract say about the construction period and extensions of time?

The answers will not remove every risk. They can give you a clearer understanding of the program you are agreeing to.

What does Build Insight WA look for?

The program is not something we look at in isolation. A realistic construction timeframe has to make sense alongside the design, the site, the builder's capacity, the specification and the contract. The value of an independent review is not predicting an exact handover date. It is testing whether the assumptions behind the proposed program are reasonable and identifying the questions that should be answered before you commit.

Build Insight WA’s view:a timeline you understand and can defend is more useful than an optimistic date that has not been properly tested.

Planning ahead is what you can control

No one can prevent every potential delay. Good planning is about reducing the avoidable ones. Understanding the builder's program, making decisions early and asking direct questions before construction starts gives you a better basis for planning finance, accommodation and other commitments.