Victoria runs the strictest sale-time regime for owner-builders in the country: sell within 6.5 years of completion and you must buy an insurance policy and commission an independent defects report before the contract is signed. Miss either and you’ve committed an offence — and handed the buyer a lever. This guide covers both obligations, the during-build position, and the 10-year liability horizon behind it all.
Verify against the Building and Plumbing Commission and Consumer Affairs Victoria before acting — the scheme moved house in 2025 and thresholds are under review.
The 6.5-year rule, in one table
Selling within 6.5 years of the occupancy permit (or certificate of final inspection) for owner-builder work:
| Obligation | Trigger | Detail |
|---|---|---|
| Domestic Building Insurance (DBI) | Work valued over $16,000 | Bought before signing the contract of sale; certificate goes in the Section 32 vendor statement |
| s137B defects inspection report | Any value of owner-builder work | By an independent registered building practitioner; no more than 6 months old at contract; also into the Section 32 |
Both come from s137B of the Building Act 1993. Selling without them is an offence — and a contract-collapsing discovery when the buyer’s conveyancer finds it.
What owner-builder DBI actually covers
It protects the buyer, not you: if you die, disappear or become insolvent, the policy covers them (up to $300,000) for structural defects up to 6 years and non-structural defects up to 2 years after completion. It does not cover failure to complete — you already finished — and it doesn’t reduce your personal liability one dollar.
Since 1 July 2025 the scheme is run by the Building and Plumbing Commission (which absorbed the VBA and VMIA’s DBI role), sold through a short list of distributors — HIA Insurance Services, Master Builders Insurance Brokers and a few others. Premiums scale with project value, from several hundred dollars on small projects into the low thousands on full builds — and they’ve risen sharply in recent years, so get a current quote rather than budgeting from a forum post.
During the build: both sides of the ledger
- Your policies — construction works + public liability, personal accident, volunteers, and WorkCover if you directly employ labour (registration from roughly $7,500/yr in remuneration). The owner-builder insurance guide walks each one.
- Your contractors — any builder or trade you engage for domestic building work over $16,000 must provide DBI for their contract before taking a deposit. Certificate first, deposit second — make it a written precondition in the contract negotiation.
The 10-year horizon behind it all
Two clocks run after completion, and owner-builders conflate them:
- 6.5 years — the sale-time insurance and report obligation above.
- 10 years — the outer limit for any building action against you (s134 Building Act). The implied warranties on your work run with the property to subsequent owners for that whole period.
So the 6.5-year mark isn’t when liability ends — it’s only when the sale paperwork gets lighter. Your build records, certificates and photos are the defence file for the full ten years: the handover pack is that file, assembled while it’s easy.
The sequence
- Before contracts: collect contractor DBI certificates (over $16,000) before deposits move.
- During: file every compliance certificate and inspection record; photograph what gets covered up.
- At completion: keep the occupancy permit — both clocks start here.
- Selling within 6.5 years: DBI policy + s137B report (under 6 months old) into the Section 32 before anyone signs.
- Until year ten: keep the file.