Disputes with retaining wall builders can arise over workmanship, cost overruns, delays, or walls that fail to meet the NZ Building Code. The good news is that New Zealand has a well-established set of processes — from direct negotiation right through to formal legal action — that can help you reach a fair outcome. Here's a step-by-step guide to resolving your dispute.
Start with Direct Communication
Before escalating anything, put your concerns in writing to the builder. A clear, calm email or letter outlining the specific issues — poor workmanship, incomplete work, or a wall that's moved or cracked — gives the builder a fair chance to respond and fix the problem. Keep copies of all correspondence, photos of the defects, and any invoices or contracts.
If you have a written contract (which you should always insist on), refer to it. Check what it says about defect liability periods, dispute resolution, and payment terms.
Check Whether a Building Consent Was Required
Retaining walls in New Zealand often require a building consent, depending on their height and the surcharge they carry. Under Schedule 1 of the Building Act 2004, retaining walls up to 1.5 metres high (with no surcharge from structures or vehicles) may be exempt from consent — but this varies, so always confirm with your local council before assuming.
If consent was required and wasn't obtained, this is a serious issue. The wall may not comply with the NZ Building Code, and your council's building department can investigate. Contact your council's building consent authority (BCA) if you suspect unpermitted work.
Understand Your Consumer Rights
If the builder is a business (not a private individual), the Consumer Guarantees Act 1993 and the Fair Trading Act 1986 may apply. Under the Consumer Guarantees Act, services must be carried out with reasonable care and skill, completed in a reasonable time, and be fit for purpose. If the retaining wall fails these tests, you may be entitled to have the work remedied or to claim compensation.
Consumer NZ has useful guidance on your rights when tradespeople don't deliver.
Check Whether the Builder Is Licensed
For retaining walls over 1.5 metres, or those associated with a building consent, the work may need to be carried out or supervised by a Licensed Building Practitioner (LBP). You can check a builder's licence status on the LBP register. If a licensed practitioner performed the work, you can lodge a complaint with the LBP scheme — this is a powerful avenue because it can result in disciplinary action, fines, or licence suspension.
Try Mediation or a Disputes Tribunal
If direct negotiation fails, consider these formal options:
Mediation
Some industry bodies and councils offer mediation services. Mediation is voluntary, confidential, and often faster and cheaper than going to court. Both parties agree to work with a neutral mediator to reach a settlement.
Disputes Tribunal
For claims up to $30,000 (or up to $62,000 by agreement), the Disputes Tribunal is a low-cost, accessible option. You don't need a lawyer, and hearings are informal. This is often the most practical route for homeowners dealing with defective or incomplete retaining wall work.
District Court
For larger claims, you may need to pursue the matter through the District Court. At this level, legal representation is advisable.
Use the Building Disputes Tribunal
New Zealand also has a specialist Building Disputes Tribunal, which handles construction-related disputes — check the Building Disputes Tribunal website for current jurisdictional limits. It's faster and cheaper than the courts, and referees have technical building knowledge — making it well suited to retaining wall disputes involving workmanship or compliance issues.
Document Everything
Whatever path you take, strong documentation is essential. Gather:
- Photos and videos of the defective work, taken with timestamps
- All written communications with the builder
- Copies of contracts, quotes, and invoices
- Any council inspection records or consent documents
- Independent assessments from another qualified builder or engineer
An independent assessment from a structural engineer or another LBP can be particularly valuable in establishing whether the wall meets the NZ Building Code and relevant standards such as NZS 3604 (for timber-framed construction) — though note that NZS 3604 covers timber-framed buildings generally and may have limited direct relevance to retaining wall disputes; specific engineering design requirements will apply for larger or consented walls.
When to Call a Professional
If your retaining wall has moved, cracked, or is showing signs of failure, treat this as a safety issue first. A failing retaining wall can cause serious harm to people and property. Contact a structural engineer or qualified retaining wall builder immediately — you can find qualified local professionals on tradedirectory.co.nz.
For legal advice on your specific situation, consult a solicitor experienced in construction law. MBIE Building Performance also provides guidance on building disputes and your rights as a homeowner.
If the builder is licensed, lodging a complaint with the LBP scheme runs parallel to any financial claim and can help protect other homeowners from the same issues.
Licensed Building Practitioner (LBP)
