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Home Builders and Renovation Builders in Perth 2026, How to Find a Licensed Perth Builder and What Renovations Cost
Perth builder and home renovation guide 2026: how much home renovations, extensions, knockdown rebuilds, and new builds cost in Perth, and how to find a licensed and insured WA builder.
How we reported this
Home Builders and Renovation Costs in Perth 2026
Perth has a large and competitive residential building market. All residential building work in Western Australia requires a builder's registration from the Department of Energy, Mines, Industry Regulation and Safety (DEMIRS) Building and Energy division. Home Indemnity Insurance (HII) is mandatory for residential building contracts over $20,000. Always verify your Perth builder's registration with DEMIRS Building and Energy before signing any contract.
Home Renovation Costs in Perth 2026
- Kitchen renovation (mid-range, supply and install), typically $21,000-$45,000 in Perth
- Bathroom renovation (mid-range, full renovation), typically $15,000-$34,000 in Perth
- House extension (ground floor, single storey, basic), typically $2,000-$3,500/sqm in Perth
- Second storey addition (full storey, basic), typically $2,500-$4,500/sqm in Perth
- Knockdown rebuild (standard 200-300sqm home), typically $300,000-$650,000+ in Perth depending on specification
- New home construction (200sqm, mid-range specification), typically $260,000-$530,000+ in Perth (land not included)
- Granny flat / secondary dwelling (60sqm), typically $85,000-$160,000 in Perth
What to Know Before Hiring a Perth Builder
Perth's building approvals are processed by local government authorities or private building certifiers. Perth's extreme summer heat (regularly exceeding 40°C) makes thermal performance a critical design consideration for all Perth home renovations and new builds, NCC 2022's 7-star NatHERS requirement applies to WA. Perth's coastal sand conditions (particularly in Cottesloe, Scarborough, and the northern coastal suburbs) require specific foundation engineering for new constructions. Perth's high solar resource makes solar and battery integration (the SolarBus scheme, Synergy feed-in tariffs) an important consideration during renovation planning. The Western Australian Building Commission oversees builder conduct and dispute resolution.
This article was compiled by AI and screened before publishing. See our editorial standards.