Owner-builder in Victoria: when you can build it yourself, and what it costs you later

Property & tenancy · VIC

Victoria lets you take responsibility for building work on your own land — but past $20,000 you need the BPC's consent first, and for six and a half years after the work you carry obligations most owner-builders only discover when they try to sell.

What an owner-builder is

The Building and Plumbing Commission defines an owner-builder as someone who takes responsibility for domestic building work carried out on their own land. Consumer Affairs Victoria puts it in practical terms: you are an owner-builder if you intend to use your own skills to build, extend or renovate your home, or to manage the sub-contractors who do.

Some work is off the table no matter what: owner-builders cannot do demolition, re-stumping or re-blocking, or relocate a home — those require registered practitioners.

The $20,000 gate: certificate of consent

If the value of the work is more than $20,000, you need a certificate of consent from the BPC before a building permit can issue in your name. The BPC lists when you do NOT need one: work at or under $20,000, work that is not domestic building work, or where a registered building practitioner is named on the permit instead.

Eligibility (section 25E, Building Act 1993, as summarised on the BPC's own eligibility page): you must own the land, the work must relate to a single dwelling, you must live in or intend to live in it, you must not be in the business of building, and you must complete the owner-builder eLearning assessment plus construction induction training. A certificate is valid for 12 months, and the BPC says applications take approximately 45 business days to process when complete — build that into your timeline before the permit stage.

Once every five years

The restriction people miss: the BPC states an owner-builder can only build or renovate one home every five years and must intend to live in it. Staged work on the same home is treated differently from a second property, and the BPC can grant exemptions in special circumstances — but the default is five years between projects.

What follows you when you sell

Selling within 6 and a half years of completion changes everything. Per the BPC's "selling an owner-built home" page, if the project was worth more than the insurance threshold you must, BEFORE signing a contract of sale:

1. Buy domestic building insurance covering the work (structural cover runs 6 years, non-structural 2). 2. Obtain a defects inspection report under section 137B of the Building Act 1993 — no older than 6 months, listing all defective and incomplete work. 3. Include both in the section 32 vendor statement given to the buyer.

The statutory warranties (proper workmanship, suitable materials, compliance with the Building Act) attach to the sale and cannot be excluded. And independent of any sale, the BPC states an owner-builder remains liable for fixing defects and non-compliances for 10 years from completion of the work.

One honest wrinkle about the threshold

The BPC's current pages (updated mid-2026) put the certificate-of-consent and insurance threshold at $20,000. Consumer Affairs Victoria's owner-builder page (last updated 30 June 2025) still cites $16,000 for insurance on sale. The two official sources disagree as of August 2026. The BPC figure is the more recently maintained one — but if your project sits between those numbers, confirm directly with the BPC before relying on either.

What to do with this

1. Cost the whole project honestly BEFORE deciding to owner-build — the $20,000 gate is about the value of the work, and consent takes ~45 business days. 2. Do the eLearning assessment early; it is a prerequisite, not a formality. 3. Keep every receipt and record — the defects report and insurance at sale time are built from them. 4. If there is any chance you will sell within 6.5 years, price the insurance and inspection into the project now.

This guide is general information about Victorian law, not advice about your project. Owner-building shifts legal responsibility for the whole site onto you — if the structure or the money is significant, talk to a lawyer or a registered building practitioner before you commit.

This is legal information, not legal advice.