Western Australia doesn’t call it a permit — it’s owner-builder approval, granted by the Building Services Board through Building and Energy, and it comes with the tightest resale restrictions in the country. This guide covers when you need approval, what the application takes, and the two sale clocks (3 years and 7 years) that keep running long after handover.
Verify everything against Building and Energy (DEMIRS) before acting — fees and forms update, and this guide is general information, not advice for your project.
When you need approval
You need Building Services Board approval to owner-build in WA when the building work requires a building permit and is valued at more than $20,000 — the value of the whole project, and no, it can’t be split into sub-$20,000 packages to duck the line. One 2026 easing: for non-habitable Class 10a structures (sheds, garages, carports) the threshold rose to $50,000 from 1 July 2026. Everything else stays at $20,000.
The approval has conditions built in:
- You must be an individual owner of the land — companies and trusts can’t owner-build.
- You must intend to live on or use the property when the work is complete — not rent it out or sell it.
- Once every six years: if you were granted a building permit as an owner-builder in the past six years, you can’t get another approval unless the Board waives the rule.
The application: course, white card, Form 75
WA effectively mandates education before approval. The application (Form 75, lodged with Building and Energy) requires you to demonstrate you understand an owner-builder’s duties — in practice, by completing an approved WA owner-builder course (registered building practitioners are exempt). You’ll also need a current white card (construction induction), which WHS law requires for anyone doing construction work on site anyway.
| Item | Detail |
|---|---|
| Approval application | Form 75 to Building and Energy |
| Knowledge requirement | WA-specific owner-builder course completed within the last 24 months, or practitioner/architect/surveyor registration |
| White card | Current construction induction card (at least one applicant) |
| Ownership evidence | Certificate of title less than 3 months old (or lease/contract), photo ID for every owner |
| Fee | Non-refundable, updated each 1 July — recent residential figures ran roughly $175–$215; check the current schedule |
| Processing | Allow 6–7 weeks — build it into the program |
The two sale clocks: 3 years and 7 years
This is what makes WA different, and it catches people who owner-build with half an eye on the market:
- Three years — you can’t sell at all without consent. Under the Home Building Contracts Act, an owner-builder must not sell the property within 3 years of the building permit without approval, granted only where circumstances have genuinely changed and refusal would cause hardship.
- Seven years — selling requires home indemnity insurance. Sell between years 3 and 7 and you must first take out home indemnity insurance covering the buyer (and subsequent owners) for the remainder of the 7-year period. Selling without it is an offence with a $10,000 penalty. The policy is arranged through QBE as agent for the State — budget for it, because it’s priced per project and not trivially.
During the build: what sits on you
- Home indemnity insurance from your contractors: HII is compulsory for residential work over $20,000 done by registered builders — where you engage a builder for a package that size, the certificate is your evidence. Your own owner-built work carries no HII until the resale rule triggers it.
- Construction works and public liability insurance — not mandated, but building uninsured is gambling the project. The owner-builder insurance guide covers the full set.
- Licensed trades only for plumbing, gas and electrical — and deposit discipline for everyone: WA caps deposits under the Home Building Contracts Act, so run any big ask through the deposit checker.
Common mistakes with the approval itself
- Applying before finance is checked — owner-builder lending is its own category everywhere, WA included. Sequence the 7 steps in order.
- Doing the course too early — approved courses have currency expectations; do it when the project is real.
- Treating the value threshold creatively — under-declaring work value to duck the $20,000 line surfaces at permit and at sale.
- Forgetting the clocks — diarise the permit date. Both resale rules run from it, and both outlive your enthusiasm for paperwork.