Yes, new home builds in New Zealand do come with statutory warranties — and they are automatically implied into every residential building contract by law. You don't need to negotiate for them or even have them written into your contract; they apply regardless. Understanding what these warranties cover, how long they last, and who is responsible can save you significant stress and money if problems arise after you move in.
What Are Statutory Warranties?
Statutory warranties are legal guarantees set out in the Building Act 2004, administered by MBIE Building Performance. Under sections 362I to 362Q of the Act, every residential building contract must include implied warranties that the building work will be:
- Carried out in a proper and competent manner
- Done using materials that are fit for purpose, new (unless agreed otherwise), and of acceptable quality
- Completed in accordance with the plans and specifications in the contract
- Completed in accordance with all relevant laws, including the NZ Building Code
- Completed within the agreed timeframe (or within a reasonable time if no date is set)
- Fit for purpose — meaning the completed home will be suitable to live in
These warranties apply to the building contractor who entered into the contract with you, not to subcontractors directly (though your main contractor remains responsible for their subcontractors' work).
How Long Do the Warranties Last?
The warranty periods vary depending on the type of defect:
| Warranty Type | Duration |
|---|---|
| Defects that are apparent (visible) at completion | 1 year from completion |
| Defects that are not apparent (hidden) at completion | Up to 10 years from completion |
The 10-year period for hidden defects is particularly important. Issues like weathertightness failures, structural problems, or defective foundations may not show up immediately — but you are still protected for a decade. This aligns with the 10-year longstop period under the Limitation Act 2010, which is the maximum time you generally have to bring a legal claim.
Who Is Covered?
Statutory warranties protect the original homeowner who entered into the building contract. Importantly, they also transfer to subsequent owners of the property within the warranty period. So if you sell your home within 10 years of completion, the new owner inherits the benefit of any remaining warranty — a useful selling point.
What About Licensed Building Practitioners?
For work that requires a Licensed Building Practitioner (LBP), there is an additional layer of accountability. LBPs must carry out or supervise restricted building work — which includes structural and weathertightness elements of new homes. If an LBP does defective restricted building work, you can make a complaint to the Licensed Building Practitioners scheme. This sits alongside (not instead of) your statutory warranty rights.
Always confirm your builder holds a current LBP licence before signing a contract.
Do You Also Need a Building Consent?
Almost certainly, yes. A new home build will require a building consent from your local council, and a code compliance certificate (CCC) once the work is finished. These are separate from your statutory warranty but work together — the CCC confirms the build met the NZ Building Code at the time of construction. MBIE Building Performance has detailed guidance on the consent process.
Note that some very minor work may be exempt under Schedule 1 of the Building Act, but a full new home build is never exempt. Always confirm consent requirements with your local council.
What If Something Goes Wrong?
If you discover a defect, act promptly:
- Document everything — photos, written records, dates noticed
- Notify your builder in writing as soon as possible, describing the defect clearly
- Give the builder a reasonable opportunity to remedy the defect
- If they refuse or fail to fix it, you may pursue a claim through the Disputes Tribunal (for claims up to $30,000) or the District Court
- For serious or complex disputes, consider engaging a lawyer or a building consultant to assess the defect
Consumer NZ has useful general guidance on your rights when things go wrong with tradespeople and contractors.
For weathertightness issues specifically, BRANZ is New Zealand's leading building research organisation and publishes technical guidance that can help you understand whether a defect is a genuine building failure.
What Statutory Warranties Don't Cover
It's worth knowing the limits:
- Normal wear and tear is not covered
- Damage caused by your own actions or failure to maintain the property
- Defects caused by events outside the builder's control (e.g. earthquake damage)
- Work done by unlicensed or informal labour you arranged separately outside the main contract
Always read your building contract carefully. Some builders also offer voluntary warranties or are members of schemes like Registered Master Builders or Certified Builders, which may provide additional guarantee cover beyond the statutory minimums — worth asking about before you sign.
When to Call a Professional
If you suspect a defect in your new build, it's wise to engage a qualified building inspector or engineer to assess the issue before approaching your builder. An independent professional report strengthens your position considerably. You can find qualified local builders and inspectors on tradedirectory.co.nz.
For any work involving electrical systems, plumbing, or gas, remember these are restricted trades — only registered electricians (EWRB) and licensed plumbers and gasfitters (PGDB) can legally carry out this work.
Registered Master Builder
Licensed Building Practitioner (LBP)
