Owner Builder Guide for Australia: Permits, Risks, and Resale Implications

What is an Owner-Builder?

An owner-builder is a person who undertakes the construction or renovation of their own home, taking on the responsibilities normally held by a licensed builder. You are responsible for: obtaining all permits and approvals, managing and coordinating all trades, ensuring all work complies with the NCC, and arranging all required inspections.

Owner Builder Permits by State

• 1 NSW: Owner Builder Permit from NSW Fair Trading — available to owner-occupiers for residential work over $10,000
• 2 VIC: Owner Builder Permit from VBA — work over $16,000, must pass an assessment course
• 3 QLD: No owner builder permit — owner builders operate under the Queensland Development Code
• 4 WA: Owner Builder Licence from Building and Energy — mandatory course required
• 5 SA, TAS, NT, ACT: Varying requirements — check your state's building regulator

The Resale Restriction

In NSW and VIC, if you sell a home within 7 years of owner-builder work, the buyer can request a home inspection report and your Home Warranty Insurance (also called Owner Builder Warranty) must be provided if the work exceeded $20,000. This insurance is expensive ($1,000–$3,000+) and some owners find it difficult to obtain.

What Owner-Builders Cannot Do

• 1 Licensed electrical work: must hire a licensed electrician and obtain a Certificate of Electrical Safety
• 2 Licensed plumbing: must hire a licensed plumber
• 3 Licensed gas fitting: must hire a licensed gasfitter
• 4 Waterproofing in wet areas: must be done by a licensed waterproofer
• 5 Structural work: any work affecting structural members requires engineering sign-off

Is it Worth It?

Owner-building is most appropriate for: people with significant building experience, those with time to dedicate to project management, and projects where the savings genuinely justify the effort and risk. For first-time owner-builders tackling complex projects: the savings can be consumed by mistakes, delays, and the learning curve. Start with a smaller project if possible.