Can a Quantity Surveyor Represent Me in a Building Dispute in NZ?

A quantity surveyor (QS) can play a valuable role in a building dispute in New Zealand, but it's important to understand what that role actually involves. While a QS is not a legal representative and cannot act as your lawyer, they can provide expert cost advice, prepare detailed reports, and even appear as an expert witness — all of which can be critical to the outcome of your dispute.

What a Quantity Surveyor Can Do in a Building Dispute

In NZ building disputes, a QS is most commonly engaged to provide independent, expert cost evidence. This might include:

• Assessing the cost to remedy defective or incomplete building work
• Preparing a schedule of quantities to establish what work was actually done versus what was contracted
• Reviewing contractor invoices, variations, and payment claims for reasonableness
• Providing an expert witness report for use in mediation, adjudication, or court proceedings
• Advising on the value of work in progress or work not completed

This kind of evidence is often central to disputes involving overcharging, defective workmanship, incomplete contracts, or disagreements over variations.

How Building Disputes Are Resolved in NZ

NZ has several pathways for resolving building disputes, and a QS can assist in most of them:

Weathertight Homes Resolution Service (WHRS)

If your dispute involves a leaky building, the MBIE Building Performance website outlines the Weathertight Homes Resolution Service, which offers assessments and adjudication. A QS can prepare remediation cost estimates to support your claim.

Construction Contracts Act 2002 Adjudication

For payment disputes on construction contracts, adjudication under the Construction Contracts Act 2002 is a common and relatively fast process. A QS can help you prepare your adjudication response or application by quantifying the amounts in dispute and providing supporting cost analysis.

Disputes Tribunal

For smaller claims (check the current monetary limit on the Ministry of Justice website, as the threshold has changed over time), the Disputes Tribunal is an accessible option. A QS report can strengthen your evidence, though the Tribunal is designed to be straightforward enough that many homeowners represent themselves.

District or High Court

For larger or more complex disputes, legal proceedings may be necessary. Here, a QS acting as an expert witness can be particularly powerful — presenting independent, professional cost evidence to the court.

The Difference Between a QS and a Lawyer

It's essential to understand that a QS cannot provide legal advice or act as your legal representative. They are a cost and construction expert, not a legal professional. In formal proceedings, you will generally still need a lawyer to:

• Advise you on your legal rights and obligations
• Draft or review legal documents and pleadings
• Represent you in court or formal hearings

Think of a QS and a lawyer as complementary — the lawyer handles the legal strategy, while the QS provides the technical cost evidence that underpins your financial claim.

What Makes a Good QS for Dispute Work?

Not all quantity surveyors have experience in dispute resolution. When looking for a QS to assist with a building dispute, consider:

• Membership of the New Zealand Institute of Quantity Surveyors (NZIQS) — a sign of professional standards and ongoing education
• Experience preparing expert witness reports and appearing in adjudication or court proceedings
• Familiarity with NZ construction contracts (such as NZS 3910 or the NZS 3604 framework for residential work)
• Independence — your QS should be able to provide an unbiased, objective assessment

You can find qualified quantity surveyors in your area through tradedirectory.co.nz.

Costs and Timeframes

Engaging a QS for dispute work is an investment, but it can be well worth it if the amounts in dispute are significant. As a rough guide, fees will depend on the complexity of the dispute, the volume of documentation to review, and whether the QS is required to appear as a witness. Always ask for a fee estimate upfront and clarify what is included.

Keep in mind that if you are successful in your dispute, you may be able to recover some or all of your QS costs as part of your claim — this is worth discussing with your lawyer.

When to Call a Professional

You should engage a quantity surveyor as early as possible if:

• You believe you have been overcharged for building work
• A contractor has left work incomplete or defective
• You are facing an adjudication claim from a contractor and need to respond
• You need an independent assessment of remediation costs for a leaky or defective building
• You are preparing for mediation, adjudication, or court proceedings

Always engage a lawyer alongside your QS for any formal legal process. For guidance on building consents, your rights as a homeowner, and the NZ Building Code, the MBIE Building Performance website is an excellent starting point. For broader consumer advice, Consumer NZ also has useful resources on resolving disputes with tradespeople.

Sources & Further Reading

• MBIE Building Performance – Building disputes and the Building Act
• BRANZ – Building research and technical guidance
• Consumer NZ – Disputes with tradespeople
• Licensed Building Practitioners – Checking your builder's licence
• Standards NZ – NZ construction standards
• WorkSafe NZ – Health and safety on construction sites