The Victorian Building Authority (VBA) is the state regulator responsible for builder registration in Victoria. Verifying VBA registration is the single most important check you can make before signing a HIA fixed-price contract or paying a deposit. This independent guide walks through how to search the VBA public register, what categories mean, how to spot disciplinary red flags, and how VBA registration works alongside Domestic Building Insurance.
Quick answer
Every legitimate Melbourne home builder must hold current VBA registration in the "Domestic Builder Unlimited" or "Domestic Builder Manager" category. Verify it free at vba.vic.gov.au before signing anything. Cross-check expiry date, category, and any disciplinary history. Signing with an unregistered builder voids your Domestic Building Insurance.
The Building Act 1993 requires any person or company carrying out domestic building work in Victoria above the DBI threshold to hold current VBA registration. This isn't optional or bureaucratic - registration is what protects you: it triggers Domestic Building Insurance eligibility, brings the builder under VBA disciplinary oversight, and gives you VCAT as a dispute forum. Engaging an unregistered builder means none of those protections apply.
If any step fails, DO NOT sign a HIA fixed-price contract or pay a deposit. Ask the builder to explain in writing. A legitimate builder will happily walk you through their registration; an evasive builder is a red flag.
Watch for "borrowed" registration
A shady practice: an unregistered contractor engages a DB-U-registered individual as a nominal "manager" while running the job themselves. If the registered person isn't actively supervising your site, this is unlawful "lending" of registration. Ask to meet the registered practitioner. If they can't come to a pre-contract meeting, walk.
The VBA maintains a Disciplinary Register showing every finding of "unsatisfactory professional conduct" or "professional misconduct" against a registered practitioner. Not every entry is disqualifying - context matters. Minor CPD lapses or paperwork issues from 5+ years ago are usually resolved. Recent (2023-2025) findings of poor workmanship, unlicenced work, or financial misconduct in the same category you're commissioning ARE red flags. When in doubt, call the VBA and ask what the finding related to. This is a free call and takes 10 minutes.
VBA registration is the builder's licence to operate. Domestic Building Insurance (DBI) is per-project insurance arranged fresh for each job. You need BOTH. Signing with an unregistered builder voids DBI cover automatically - the insurer will decline any claim. Signing with a VBA-registered builder who hasn't yet arranged DBI on your specific project is equally problematic - the insurer won't back a project it wasn't notified about. Confirm BOTH before deposit.
The Victorian Building Authority (VBA) is the Victorian government regulator responsible for building and plumbing practitioner registration, disciplinary action, consumer complaints, and enforcement of the Building Act 1993. Every legitimate residential builder taking a Victorian contract over the DBI threshold must hold current VBA registration.
Go to the VBA Practitioner Register at vba.vic.gov.au. Enter the builder's company name OR their practitioner registration number. The register shows registration status, category (Domestic Builder Unlimited / Domestic Builder Manager / Limited), expiry date, and any disciplinary history. This is a free 30-second check.
For a full new home or knockdown rebuild: Domestic Builder (Unlimited) - "DB-U" - is the standard requirement. Domestic Builder (Manager) - "DB-M" - is acceptable if the builder company employs a DB-M who supervises the work. Limited categories (e.g. concreting-only, roofing-only) cannot legally carry a full residential contract.
Do NOT sign a contract. Any residential building work over the DBI threshold requires VBA registration - engaging an unregistered person voids your Domestic Building Insurance, exposes you to enforcement action, and leaves you with no recourse if things go wrong. Report unregistered activity to the VBA immediately.
Yes. The VBA can suspend or cancel registration for financial misconduct, repeated defective work, insolvency, false statements, or serious breaches of the Building Code. The VBA maintains a public disciplinary register - always search your prospective builder's name against it before signing.
VBA registration is the builder's licence to operate (person / company level, ongoing). DBI is per-project insurance (specific to your build, arranged fresh each job). You need BOTH. VBA registration alone doesn't protect you if the builder becomes insolvent - that's what DBI is for.
Annually. VBA registration expires each year on the practitioner's renewal date, and is contingent on ongoing CPD, financial standing, and no active disciplinary matters. When you check the register, confirm the expiry date is at least 30 days beyond your expected contract signing date.
Not automatically - depends on severity and recency. Minor CPD lapses or paperwork issues from 5+ years ago are usually resolved. Recent (2023-2025) findings of "unsatisfactory professional conduct" or "poor workmanship" ARE a red flag - especially in the same category of work you're commissioning. When in doubt, call the VBA and ask what the disciplinary finding related to.
General information only. VBA registration categories, thresholds and disciplinary processes can change. Always confirm current requirements with the VBA and engage a qualified VIC-licensed conveyancer or building lawyer for specific advice on your build.
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