How to Hire a Builder in New Zealand

How to Hire a Builder in New Zealand

Most people think hiring a builder is about finding someone good and getting a fair price. It is, but the part that decides whether your renovation goes well sits somewhere else entirely: whether the person you hire actually holds the licence class that covers your job, and whether they can produce the paperwork the law requires before you sign anything.

Here is the thing that surprises people. If your building work costs $30,000 or more including GST, a written, dated contract is not good practice — it is the law. A builder who enters an unwritten contract commits an infringement offence, and the fine can reach $2,000. That single fact tells you more about who you are dealing with than any quote will.

This guide is about choosing the builder as a business and running the relationship. The quotes side lives in our separate building quotes guide, and the document itself lives in our renovation contracts guide.

How We Researched This Guide

We worked from the Building Act 2004 and the Licensed Building Practitioner scheme rather than from builder websites, because the rules that protect you are statutory and the rest is marketing. The thresholds we quote — the $30,000 minimum price, the $2,000 infringement fines, the $50,000 and $150,000 penalties for a knowingly false statement — are set out in full on legislation.govt.nz and in the Building (Residential Consumer Rights and Remedies) Regulations 2014.

One detail we had to get right is the Site licence. It is a genuine trap: a Site LBP is licensed for coordination and oversight, not for carrying out building work, so they cannot carry out or supervise restricted building work and cannot issue a Record of Building Work. A builder whose only class is Site cannot sign off the structural work on your house. We have spelled that out below because almost nobody knows it.

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The Quick Summary (60-Second Version)

If you read nothing else, read this:

• Ask for the LBP licence number and the class, then check it on the public register. A licence in the wrong class is effectively no licence for your job.
• Confirm whether your work is restricted building work. If it touches the primary structure or weathertightness, it must be done or supervised by an LBP in the right class.
• At $30,000 or more including GST, the builder must give you the prescribed disclosure information and checklist before you sign, and the contract must be written and dated.
• Ask how many jobs they are running right now. Capacity is the difference between a builder who is on site and one who is not.
• Ask for a current job, and talk to that client without the builder standing next to you.
• Agree in writing how variations get priced and approved. Nothing proceeds without your sign-off.

What the Licensing Rules Actually Require

Restricted building work is residential design, construction or alteration work that requires a building consent — or is a small standalone dwelling built under the granny flats exemption — and involves or affects a home's primary structure, weathertightness, or certain fire safety design. It can only be carried out or supervised by a licensed professional holding the relevant licence class.

The classes are design, carpentry, roofing, external plastering, bricklaying or blocklaying, foundations, and site. Supervision means providing control, direction and oversight to an extent that ensures the work is done competently and complies with the consent. So when you ask about licensing, the useful question is not "are you licensed" but "which class, and does it cover this job".

The Site Licence Trap

The Site class is different from the rest. It covers the coordination and oversight of building work rather than the carrying out of it. Site LBPs are not licensed to carry out building work, so they cannot carry out or supervise restricted building work, and they cannot issue Records of Building Work.

It is a voluntary licence showing the holder has been assessed as competent in site coordination, which is genuinely useful on a big job. But if a builder's only LBP class is Site, they cannot sign off the restricted work on your house. Ask directly, and check the register rather than accepting the answer.

The Record That Follows the House

Every LBP who carries out restricted building work must provide a Certificate of Design Work or a Record of Building Work. The design certificate has to detail all restricted building work in the project, and designers cannot contract out of that obligation. Both documents get submitted to the council.

These create a record of who did what on the house and how it meets the Building Code. That record follows the house, which is why it matters even if you never plan to sell. A builder who shrugs at the question is telling you something before the first nail goes in.

Choosing the Builder, Not Just the Price

Once the licence question is settled, you are choosing a business and a working relationship. The signals that matter most are boring and consistent: whether they turn up, whether they communicate in writing, and whether they tell you about a problem the day they find it rather than the week after.

Ask how many jobs they are running at the moment. A builder juggling too many sites will not be on yours, and the programme will drift. Ask whether the person you are dealing with is the person who will run the job day to day, and whether they will be on site. Ask whether their subcontractors are regulars who know their standard, or whoever is free that week.

What Good Looks Like on Site

Visit a current job. A site that is safe, tidy and organised is a leading indicator of a programme that is under control. A chaotic site usually means a chaotic schedule, and you will be the one absorbing the delay.

Talk to that client without the builder standing beside you. Ask two specific questions: did the final price match the quote, and did anything have to be redone. Those two answers tell you more than a portfolio of finished photos.

Running the Job Once It Starts

Agree a weekly check-in and keep a written log of conversations and changes. Pay only for completed stages as set out in the contract. If a variation comes up, get the price in writing before the work proceeds — not after.

Photograph the condition of the area before work starts. It is free, takes two minutes, and it removes a whole class of arguments about pre-existing damage. And if something goes wrong, raise it early and in writing. Most disputes that end up at the Disputes Tribunal started as a conversation nobody wrote down.

Questions You Might Have

Does my builder need to be licensed?

Only for restricted building work, but that covers more than most people expect. If the work requires a building consent and affects the primary structure or weathertightness of your home, it must be carried out or supervised by an LBP in the relevant class. For other work there is no licensing requirement, so the substitute checks are references, insurance and a written contract.

What happens if my builder is not licensed for the job?

If restricted building work is done by someone without the right licence class, the council can refuse to sign off the work, and you may be required to have it redone or independently verified. That is your problem as the homeowner, not the builder's. Check the register yourself before work starts rather than relying on a verbal assurance.

Do I need a written contract?

At $30,000 or more including GST, yes — the Building Act requires a residential building contract to be in writing and dated, and the builder must give you the prescribed disclosure information and checklist first. Below that threshold it is not mandatory, but a written contract is still the single best protection you have, particularly around variations and payments.

What if the work is not done properly?

The Building Act implies warranties into residential building contracts covering competent workmanship, compliance with the law, and completion within a reasonable time. The guidance is that these cannot be contracted out of, so a one-year workmanship warranty does not limit your statutory rights. Give the builder a proper written chance to fix it first.

Can I withhold money if I am unhappy with the work?

On larger jobs a retention — a portion held back until completion — is a recognised mechanism, but it must be set out in the contract. Outside that, withholding payment is risky because the Construction Contracts Act sets strict timing for payment claims and schedules. Talk to the builder in writing before you stop paying anything.

What Matters Most

The licence check is the one thing you cannot skip, and it takes about two minutes on the public register. Confirm the class covers your job, not just that the person is licensed. Then confirm whether your work is restricted building work, because that determines whether the licence question even applies.

After that, the relationship does the heavy lifting. A builder who communicates in writing, tells you about problems early, and can show you a current job is worth more than a cheaper quote from someone you cannot reach. The price is a function of the specification — so the way to control cost is to freeze the scope, agree the allowances, and write down every change before it happens.

Get the paperwork right at the start. It is dull, it is brief, and it is the difference between a renovation and a dispute.