What Counts as a Major or Structural Defect Under Victorian Law

What it is

Victoria does not carry a statutory major defect definition of the kind New South Wales has in section 18E of the Home Building Act 1989 (NSW). The Domestic Building Contracts Act 1995 (Vic) implies section 8 warranties without splitting them by defect severity. Section 9 of that Act runs the warranties with the building. Section 134 of the Building Act 1993 (Vic) sits behind them as a 10 year long-stop measured from the occupancy permit or final inspection certificate.

That leaves the major or structural characterisation to be done at three other layers: the Building and Plumbing Commission's rectification-priority framework, the Home Warranty (or legacy DBI) insurance triggers, and common law industry practice.

The section 8 warranties are flat

Section 8 of the DBCA implies six warranties into every domestic building contract: proper and workmanlike work per plans and specifications, good and suitable and new materials unless otherwise stated, statutory compliance, reasonable care and skill and timely completion, suitability for occupation, and fitness for any particular purpose the owner has made known. The Act sets the same warranties for every defect within scope. Whether the defect is a cracked cornice or a sagging first-floor beam, the statutory warranty analysis is the same.

Section 10 of the DBCA voids any waiver, so the warranties cannot be excluded or narrowed by contract.

The 10 year long-stop under section 134

Section 134 of the Building Act 1993 (Vic) sits behind the DBCA warranties as a limitation cap. An action for damages relating to defective building work must not be brought more than 10 years after the date of issue of the occupancy permit for the building work (or, if no occupancy permit was issued, 10 years after the certificate of final inspection).

Inside the 10 years the ordinary limitation periods apply. A contract claim: 6 years from breach under section 5 of the Limitation of Actions Act 1958 (Vic). A tort claim: 6 years from the cause of action. A statutory warranty claim: 10 years from occupancy permit for the outer boundary, but the underlying claim still needs to be brought inside the ordinary limitation period.

The BPC rectification-priority framework

The Building and Plumbing Commission (BPC) took over from VBA on 1 July 2025 and runs the rectification-order pathway. BPC guidance splits defects into structural and non-structural for the purpose of order priority and inspection triggers. Structural elements: foundations, footings, load-bearing walls, roof structure, floor structure, external walls where load-bearing. Non-structural: internal fitout, finishes, fixtures.

A structural defect finding triggers a faster inspection cycle and a shorter rectification timeframe under the order. A non-structural finding runs on the normal timeline. That is a regulatory priority framework rather than a warranty period trigger, but it drives the practical experience of a defect claim in Victoria.

The Home Warranty insurance trigger (from 1 July 2026)

The 1 July 2026 Victorian Home Warranty insurance regime replaced legacy Domestic Building Insurance and is a first-resort scheme. Cover responds where the work is incomplete, defective or non-compliant and the builder is unable or unwilling to fix it. Cover cap: $400,000 total per home. Cover periods: 6 years for a major defect and 2 years for other defects post completion. That mirrors the NSW structure and carries the major or non-major analysis into the insurance layer for the first time in Victoria.

Legacy DBI policies issued before 1 July 2026 remain on their existing terms: $300,000 cap, last resort, 180 day notification.

Common law "structural defect" language

Where the DBCA is silent, VCAT and the Supreme Court have used the ordinary industry meaning of structural defect: a defect affecting the load-bearing capacity of a building, its structural stability, or its ability to withstand loads and forces. That reading is used to allocate the 10 year long-stop against particular defects and to draw priority within the section 8 warranty framework.

How Victoria compares

Victoria is the outlier for having no statutory major defect definition despite the 10 year long-stop. The other jurisdictions that use a two-tier duration structure (NSW, QLD, ACT, NT) all supply the definition (or the working guidance) in the statute or its regulations. South Australia solves the problem by using a flat 5 year period under section 32(5) of the BWCA with no split.

The Domestic Building Contracts Amendment Act 2025 (Vic), commencing by 1 December 2026, restructures parts of the DBCA but does not appear to introduce a statutory major defect definition. That gap will remain for the foreseeable future.