After carpentry work is completed on your NZ home, you have the right to expect the work to be free from defects — and there are several layers of protection that apply, from the contract itself through to your broader legal rights under the Building Act 2004. Understanding these layers helps you know exactly where you stand if something goes wrong.
What Is a Defects Liability Period?
A defects liability period (DLP) is a defined window of time after practical completion of building work during which the contractor is obliged to return and fix any defects that emerge — at no extra cost to you. It is essentially a warranty period written into your contract. During this period, the builder carries the risk of fixing faults caused by poor workmanship or non-compliant materials.
The DLP is separate from your broader statutory rights, which we'll cover below.
Typical DLP Lengths for Carpentry Work in NZ
There is no single fixed DLP required by law for residential carpentry in New Zealand — the length is usually set by the contract you sign. As a general guide:
| Type of Work | Typical DLP Range |
|---|---|
| Minor carpentry (e.g. shelving, doors, trim) | 3–6 months |
| Larger residential projects (e.g. renovations, framing) | 6–12 months |
| New builds under a formal building contract | 12 months (common industry standard) |
Many carpenters and building companies use standard contracts such as the New Zealand Residential Building Contract or similar documents that specify a 12-month DLP for new builds and major renovations. Always read your contract carefully before signing and ask your tradesperson to clarify the DLP if it isn't clearly stated.
Your Broader Legal Rights Under the Building Act
Even after a DLP expires, you are not without protection. The Building Act 2004 provides important statutory warranties for residential building work. Under the Act, a building contractor implicitly warrants that:
- The work will be carried out with reasonable care and skill
- All materials used will be fit for purpose
- The completed work will be fit for its intended use
- The work will comply with the New Zealand Building Code
These implied warranties apply for 10 years from the date of the building consent being issued (or, for work not requiring consent, from the date of completion). This means that even if your 12-month DLP has passed, you may still have a legal claim for significant defects discovered later.
For guidance on building consents and what work requires one, MBIE Building Performance is the authoritative source. Some minor carpentry work may fall under Schedule 1 exemptions and not require a consent — always confirm with your local council, as exemptions can vary.
What Counts as a Defect?
A defect is generally any fault, imperfection, or failure that:
- Results from poor workmanship or non-compliant materials
- Causes the work to fall below the standard a reasonable person would expect
- Means the work does not comply with the Building Code or the agreed contract specifications
Common carpentry defects include poorly fitted doors or windows, structural framing issues, substandard joinery, gaps in cladding or linings, and non-compliant fixings. For technical guidance on acceptable standards, BRANZ publishes widely used best-practice resources for the NZ building industry.
What to Do If You Discover a Defect
- Document everything — take dated photos and written notes describing the defect.
- Notify your contractor in writing — email is ideal as it creates a clear record. Be specific about what the defect is and where it is located.
- Allow a reasonable opportunity to remedy — give the contractor a fair chance to inspect and fix the issue within a reasonable timeframe.
- Escalate if needed — if the contractor refuses or fails to act, you can seek resolution through the Disputes Tribunal (for claims up to $30,000) or the District Court for larger claims.
- Check licensing — if your carpenter is a Licensed Building Practitioner (LBP), you can also make a complaint to the LBP scheme if the work is defective. LBPs are legally required to carry out and supervise restricted building work (RBW), which includes structural and weathertight elements of a home.
Licensed Building Practitioners and Restricted Building Work
For any carpentry that involves restricted building work — such as structural framing, alterations to load-bearing walls, or work affecting the weathertightness of your home — the work must be carried out or supervised by a Licensed Building Practitioner. This is a legal requirement under the Building Act. Using an LBP gives you an additional layer of accountability, as they are professionally registered and can be held to account through the LBP complaints process.
You can verify a tradesperson's LBP licence at lbp.govt.nz.
When to Call a Professional
If you notice any of the following after carpentry work, contact your tradesperson promptly within the DLP:
- Doors or windows that stick, won't close properly, or show gaps
- Visible cracks in framing, linings, or joinery
- Signs of moisture ingress around new or altered cladding
- Structural movement or sagging
- Any work that appears not to meet the Building Code
For complex defect disputes or if you suspect significant structural or weathertightness issues, it's worth engaging an independent building inspector to assess the work. You can find qualified local carpenters and building inspectors on tradedirectory.co.nz.
