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Checking a prefab builder's licence and insurance

From Modular Living Australia — the independent knowledge base Last updated: 8 Oct 2026

Australia has no national builder licence register: each state and territory licenses builders separately, and every state regulator's register is free to search.^[1] In New South Wales, NSW Fair Trading's public registers include contractor licences and Home Building Compensation certificates, and HBC cover is required for residential building work over A$20,000.^[2] For a factory-built home, the key question is which party holds the building permit, because the permit holder carries the compliance obligation for the finished building.^[3]

Verifying a builder is the same exercise for a prefab home as for any other, with one addition that matters more here than anywhere else: a factory-built house often involves two parties, and the licence that protects you attaches to the one doing the building work on your land, not necessarily the one whose name is on the product. This guide covers how to run the standard checks and what the additional prefab question is.

There is no national register §

Australia does not have a single government-run register of builders. Each state and territory licenses separately, through the QBCC in Queensland, the building regulator in Victoria, Fair Trading in New South Wales, DEMIRS Building and Energy in Western Australia, Consumer and Business Services in South Australia, Access Canberra in the ACT, CBOS in Tasmania and NT Building Advisory Services in the Northern Territory^[1].

Every one of those regulators provides a free online licence search^[1]. Nobody needs to pay a commercial aggregator to run this check, and any builder reluctant to supply a licence number is answering the question by not answering it.

Licensing thresholds differ. In New South Wales the threshold is A$5,000 including GST^[1] — low enough that essentially any prefab installation on a residential block falls inside it.

Running the search §

In New South Wales the search can be run by name, licence number or ABN^[4]. Most other jurisdictions work the same way.

Two practical traps are worth knowing before you start.

The first is licence class. A licence is not a general permission to build anything. In New South Wales the class to look for on a full new build is General Building Work or Residential Building Work, rather than a restricted category such as kitchen or bathroom renovation work^[5]. Victoria draws the same distinction differently: Domestic Builder Unlimited covers a full build, while Domestic Builder Limited covers only specified work types such as carpentry, and is not sufficient to manage a whole house^[5].

The second is name matching. The Western Australian register does not publish trading names, so the legal entity name has to be searched rather than the brand^[5]. This matters disproportionately in the prefab sector, where the marketing name on a website and the licensed entity in the contract are frequently different. Ask for the ABN or ACN and the exact registered entity name, and check that the same name appears on the contract, the permit and any insurance certificate.

Insurance and history are separate checks §

A current licence is not the same as current insurance, and the registers keep them apart.

In New South Wales, Home Building Compensation cover is required for residential building work over A$20,000. The HBC Check tool allows a certificate to be verified by certificate number or by property address, and also allows a search of certificates issued by a particular builder — which produces a picture of what work that builder has actually insured^[2].

Fair Trading also holds compliance and disciplinary information about registered practitioners, and operates a Complaints Register listing businesses that have attracted 10 or more complaints in a single calendar month^[2]. Separately, the ASIC register shows company details, documents lodged, and persons banned or disqualified from operating a company^[2] — the check that catches a director who has previously walked away from a failed building entity.

Note that publication is not comprehensive: some regulator actions, such as education or warning letters, are not published on the register^[2]. An empty disciplinary record means nothing adverse has been published, not that nothing has occurred.

The check that is specific to prefab §

This is the one that does not arise on a conventional build.

Responsibility for the compliance of a finished building sits with whoever holds the permit. There is a substantial difference between a contract to install a product the client has supplied and a contract that carries responsibility for the compliance of the completed building — and the permit records which of the two applies^[3].

The practical consequence is sharp. A buyer who purchases a factory-built dwelling directly and then engages someone to install it may have bought a product, not a building, and may find the local installer's contract limited to placement rather than to compliance of the result. Regulators have been warning buyers away from dwellings marketed as needing no permit on that basis^[3].

Two related documentation points follow. Test evidence supporting a product is only usable if the testing laboratory holds NATA accreditation, or accreditation from an overseas authority NATA recognises; and where no CodeMark certificate exists, the compliance route becomes a Performance Solution, which involves engineering input and documentation and is accepted at the certifier's discretion rather than as of right^[3].

Before signing anything, establish in writing which party is named on the building permit, and whether their contract covers compliance of the completed dwelling or only its installation.

A national scheme is being drafted §

The gap above is recognised. A 2026 draft national voluntary certification scheme for prefabricated construction proposes an explicitly systems-based model, assessing a manufacturer's end-to-end systems and processes — quality management, production controls, workforce competency, traceability, storage, transport and installation procedures — with an optional design approval pathway for eligible repeatable designs. The consultation also asks whether alternative licensing pathways should be considered for overseas manufacturers, noting that system-level controls, certification and auditing may sometimes suit better than relying only on individual trade licensing^[6].

Until that scheme is in force, manufacturer certification is not a substitute for checking the licence of whoever signs your permit.

What is not covered here §

Register names, search tools, thresholds and licence class terminology differ between jurisdictions and change over time. This guide does not reproduce the current position for every state; the regulator's own site is the authority in each case. Insurance schemes are compared separately in Building insurance and warranty schemes by state, and the effect of an insolvent builder in What happens if your builder becomes insolvent.

Verification checklist §

• Registered legal entity name and ABN or ACN, not the trading name.
• Licence number, class, status and expiry on the relevant state register.
• Whether the licence class covers a full residential build or only restricted work.
• The same entity name appearing on the contract, the permit and the insurance certificate.
• An insurance certificate for this project, verified against the regulator's own tool where one exists.
• Any published disciplinary findings, and the ASIC record of the directors.
• Which party is named on the building permit, and whether their contract covers compliance of the finished building.
• What certification travels with the manufactured components, and which laboratory produced any test evidence.

References §