What do statutory warranties cover on NSW building work?

By BuilderVet team. Last reviewed 2 November 2026.

NSW statutory warranties are promises the Home Building Act 1989 builds into every residential building contract, covering things like due care and skill, suitable new materials, legal compliance and a home that is reasonably fit to live in. They apply even if your contract doesn’t mention them, and you generally have 6 years from completion to act on a major defect and 2 years for other defects.

This guide covers what the warranties say, how long they last, what counts as a major defect, and what to do before time runs out. It is general information, not legal advice.

What do the warranties promise?

The NSW Government lists these warranties on its residential building contracts page:

• the work will be done with due care and skill
• the work will follow the plans and specifications in the contract
• all materials supplied will be suitable for their purpose
• materials will be new, unless the contract says otherwise
• the work will comply with the Home Building Act 1989 and any other law
• the work will be done with due diligence and within the time in the contract, or otherwise in a reasonable time
• if the work includes building, altering, adding to, repairing, renovating, decorating or protectively treating a dwelling, it will result in a dwelling that is reasonably fit to live in
• the work and materials will be reasonably fit for any specified purpose the owner told the contractor about, while relying on the contractor’s skill and judgment

The government says that even if these warranties are not written into the contract you sign, the law says they still apply.

How long do the warranties last?

The government says these periods apply to contracts signed on or after 1 February 2012. For incomplete work, Building Commission NSW says the period starts from the date the contract was terminated or, if it wasn’t terminated, the date work stopped.

The clock usually starts at completion, which has a specific legal meaning. See practical completion and handover in NSW.

What is a major defect?

The government defines a major defect as a defect in a major element of the building caused by defective design, workmanship or materials, or a failure to comply with the National Construction Code’s structural performance requirements. Examples it gives include:

• a load-bearing part essential to the building’s stability, such as foundations, footings, floors, walls, roofs, columns or beams
• a fire safety system
• waterproofing

Whether a particular problem is a major defect can be disputed. A building report from a qualified inspector helps, and the NSW Guide to Standards and Tolerances explains what standard of work is acceptable for common issues.

Who can rely on the warranties?

The government says builders, developers, owner-builders and tradespeople must ensure their work is done with due care and skill, and that a homeowner or a later purchaser can enforce the warranties within the time limits.

That matters if you buy a recently built or renovated home. The warranty period runs from completion of the work, not from the date you bought, so check when the work was finished.

How do warranties relate to your contract and HBC cover?

For jobs over $20,000, the government says the large job contract must include the warranties required by the Home Building Act. If yours doesn’t, the warranties still apply, but the gap is a reason to ask questions before you sign. See questions to ask a builder before signing.

Statutory warranties are claims against the builder. Home Building Compensation Fund cover is different. It is a last resort that icare says only applies if the builder has died, disappeared, become insolvent, or had their licence suspended for not complying with a money order. Defects alone don’t trigger a HBC claim while the builder is still around and trading.

The HBC cover periods mirror the warranty periods: 6 years for major defects and 2 years for other defects. So the same diary dates usually matter for both.

What should you do when you find a defect?

1. Write it down. Note the date you noticed it and take photos.
2. Tell the builder in writing and give a reasonable time to fix it. Keep a copy.
3. Notify your HBCF insurer in writing if you have Home Building Compensation Fund cover. The government says you must notify immediately when you become aware of defective or incomplete work. See how to make a HBC claim in NSW.
4. Lodge a complaint with Building Commission NSW if the builder doesn’t fix it. See how to lodge a building complaint in NSW.
5. Watch the deadline. Building Commission NSW says that if you are nearing the end of the warranty period, you should also lodge an application with NCAT to preserve your rights. See how NCAT home building claims work.

Building Commission NSW says it is the homeowner’s responsibility to apply to the tribunal before the warranty period expires. If the period has passed, it and the tribunal may not be able to deal with your application.

Worked example: counting the deadlines

Say a new house reached completion on 1 March 2025.

• Other defects: the 2-year period ends on 1 March 2027.
• Major defects: the 6-year period ends on 1 March 2031.
• A cracked tile found in November 2026 is in the last 6 months of the 2-year period, so the owner may get an extra 6 months, to about 1 September 2027.

The owner diarises all three dates and plans to lodge at NCAT well before any of them if the dispute isn’t resolved. Exact dates can turn on when completion legally happened, so get advice if you are close to a deadline.

How BuilderVet helps

Our free check shows the licence, ASIC and ABN records for a builder, with the date we checked each one. That helps you find the right party if a warranty dispute starts. For NSW builds, Build Watch (A$79 once) sends change notices for 24 months, such as a licence or company status change. See pricing.

Frequently asked questions

Do statutory warranties apply if my contract doesn’t mention them?

Yes. The government says the warranties apply by law even if they aren’t written into the contract.

How long is the warranty for major defects in NSW?

6 years from completion of the work, and 2 years for other defects, for contracts signed on or after 1 February 2012.

Is waterproofing a major defect?

The government lists waterproofing as an example of a possible major defect, along with fire safety systems and load-bearing parts.

Do the warranties pass to a new owner?

Yes. The government says a homeowner or a later purchaser can enforce them within the time limits.

What if the defect appears just before the period ends?

If the breach becomes apparent in the last 6 months, you get an extra 6 months after the period ends to start proceedings.

Does making a complaint extend the deadline?

No. Building Commission NSW advises also lodging at NCAT if you are near the end of the period.

Do owner-builders give warranties?

The government says owner-builders, like builders and tradespeople, must ensure their work is done with due care and skill, and later owners can enforce the warranties.

Sources

• NSW Government, Contracts for residential building work, https://www.nsw.gov.au/housing-and-construction/building-or-renovating-a-home/preparing/contracts (checked 2026-11-02)
• NSW Government, Resolving building disputes with your builder or tradesperson, https://www.nsw.gov.au/housing-and-construction/building-or-renovating-a-home/resolving-building-disputes (checked 2026-11-02)
• icare, HBCF: what am I covered for, https://www.icare.nsw.gov.au/builders-and-homeowners/homeowners/hbcf-what-am-i-covered-for (checked 2026-11-02)
• icare, HBCF claim readiness, https://www.icare.nsw.gov.au/builders-and-homeowners/homeowners/hbcf-am-i-ready-to-make-a-claim (checked 2026-11-02)
• Building Commission NSW, How Building Commission NSW deals with building defect complaints, https://www.nsw.gov.au/departments-and-agencies/building-commission/about-us/building-defect-complaints (checked 2026-11-02)

Last reviewed 2 Nov 2026