Building defects: New South Wales
In New South Wales it is 6 years for a major defect, 2 years for anything else. Why the insurance does not help while the builder is still trading is on the main page.
New South Wales runs two clocks, and which one you are on turns on a definition worth reading before you argue about anything else.
Major, or not
A major defect gets six years from completion. Everything else gets two. The Act defines a major defect by reference to a major element — load-bearing components essential to stability, fire safety systems, waterproofing — where the defect makes the building unusable or unliveable for its intended purpose. Waterproofing sitting in that list matters more than anything else on this page, because a shower or balcony leak is the most common serious defect in Australian housing and it is squarely inside the six-year category rather than the two-year one.
The late-discovery extension
If a breach becomes apparent in the last six months of the warranty period, you get a further six months beyond the end of the period to commence proceedings. That is a genuine safety valve and it is widely missed. It runs from when you became aware, or ought reasonably to have become aware — so the day you first noticed is a date worth writing down.
Do not confuse it with the maintenance period
Most new-home contracts include a defects liability or maintenance period, commonly 13 weeks. That is a contractual promise from the builder and it is not the statutory warranty. When the 13 weeks ends, nothing about your six years or two years has changed.
New South Wales: the periods
- Major defect
- 6 years from completion of the work
- Any other defect
- 2 years from completion
- If the defect appears late
- A breach becoming apparent in the last 6 months of the period gives a further 6 months to commence proceedings
- Applies to contracts signed
- On or after 1 February 2012
- Can it be contracted out of?
- No — the warranties cannot be excluded or overridden by a contract
- If the home is sold
- The warranties stay with the home and pass to later owners
Read from Building Commission NSW, Building defect complaints on 13 October 2026. We publish the date we read it so you can judge how current it is. Building Commission NSW is the authority on what applies to your contract, and a period close to expiry is a reason to get advice rather than to keep reading.
Questions about New South Wales defects
How long do I have to act in NSW?
Six years from completion for a major defect, two years for anything else, for contracts signed on or after 1 February 2012.
Is a leaking shower a major defect?
Waterproofing is named as a major element, so a failure of it falls in the six-year category rather than the two-year one — provided it makes the building unusable or unliveable for its intended purpose, which is the statutory test.
I only just noticed, and the period is nearly up.
If the breach became apparent in the last six months of the period, you get a further six months beyond the end of it to commence proceedings. The clock runs from when you became aware or ought reasonably to have become aware, so record the date you first noticed.
My 13-week maintenance period expired. Have I lost my rights?
No. That is a contractual defects liability period, not the statutory warranty. Its expiry changes nothing about the six-year and two-year periods, which cannot be contracted out of.