Disputes with deck builders do happen, even when both parties start out with good intentions. The good news is that New Zealand has a well-established set of options — from a simple conversation through to formal legal processes — that can help you reach a fair outcome without necessarily going to court.
Start With Direct Communication
Before escalating anything, try to resolve the issue directly with your builder. Put your concerns in writing (email is fine) and be specific: describe the problem, reference your contract or quote, and state clearly what outcome you are seeking — whether that is remedial work, a partial refund, or something else. Keep copies of all correspondence. Many disputes are resolved at this stage once both parties understand each other's position.
Review Your Contract and Consumer Rights
Check your written contract or quote carefully. It should outline the scope of work, materials, timeline, payment terms, and any warranty provisions. If you do not have a written contract, you can still rely on the Consumer Guarantees Act 1993 (CGA) and the Fair Trading Act 1986, which apply to most residential building work in NZ. Under the CGA, services must be carried out with reasonable care and skill, completed in a reasonable time, and be fit for purpose.
Consumer NZ has plain-English guidance on your rights under these Acts, which is a useful starting point.
Check Whether Your Builder Is Licensed
For decks that require a building consent — generally those attached to the house or over a certain height (check with your local council, as thresholds vary) — the work may need to be carried out or supervised by a Licensed Building Practitioner (LBP). If your builder claimed to be licensed but was not, or if restricted building work was done by an unlicensed person, this is a serious matter.
You can verify a builder's licence status on the Licensed Building Practitioners register. If an LBP has acted negligently or dishonestly, you can lodge a complaint with the LBP scheme — this is separate from any financial dispute.
Seek Independent Assessment
If the dispute is about the quality of workmanship, consider getting an independent assessment from another qualified builder or a building inspector. A written report from a third party gives you an objective record of any defects and can be invaluable if you need to escalate the dispute. BRANZ publishes technical guidance on good building practice that can help establish what the standard of work should have been.
Try Mediation
If direct negotiation has not worked, mediation is a lower-cost, less adversarial option before heading to a tribunal or court. A neutral mediator helps both parties reach a mutually agreed solution. Some industry bodies and private mediation services offer this. It is worth exploring before committing to a formal process.
The Disputes Tribunal
For financial disputes up to $30,000 (or up to $50,000 if both parties agree — check the Ministry of Justice website for current jurisdictional limits, as these may change), the Disputes Tribunal is a practical and relatively affordable option. You do not need a lawyer, and hearings are informal. A referee will hear both sides and make a binding decision. Filing fees apply and vary depending on the claim amount — check the Ministry of Justice website for current fees.
Note that the Disputes Tribunal cannot order specific performance (i.e., force someone to complete work), so it is best suited to monetary claims such as a refund or compensation for remedial costs.
The Building Disputes Tribunal
For more complex or higher-value building disputes, the Building Disputes Tribunal (BDT) is a specialist adjudication service. It can handle disputes involving defective work, incomplete contracts, and payment disagreements. The process is more formal than the Disputes Tribunal but generally faster and cheaper than the courts. Legal representation is allowed. Visit the MBIE Building Performance website for information on dispute resolution options under the Building Act 2004.
District Court or High Court
For large or complex claims, the District Court or High Court may be necessary. This route involves legal costs and can take considerable time. It is generally a last resort. Seek legal advice before proceeding.
Document Everything
Throughout any dispute process, keep thorough records:
- Photos and videos of the work at each stage and of any defects
- All written communications (emails, texts, letters)
- Invoices, receipts, and payment records
- Your original contract or quote
- Any independent reports or assessments
Good documentation significantly strengthens your position at every stage.
When to Call a Professional
If the dispute involves significant money, structural defects, or potential breaches of the NZ Building Code, it is worth consulting a lawyer with building law experience early. They can advise on your strongest options and help you avoid procedural mistakes. If the work involved electrical or plumbing connections to your deck (such as outdoor lighting or a spa pool), those elements are restricted work that must be carried out by a licensed electrician (registered with the Electrical Workers Registration Board) or a licensed plumber/gasfitter (registered with the Plumbers Gasfitters & Drainlayers Board). Unlicensed restricted work is a separate compliance issue that may need to be reported.
To avoid disputes in the first place, always hire a reputable, qualified deck builder. You can find local professionals on tradedirectory.co.nz.
Licensed Building Practitioner (LBP)
