- Why New Zealand gives you a real licence to check
- How to find a licensed builder in New Zealand: the five checks
- What is Restricted Building Work, and who is allowed to do it
- What must a builder give you before you sign anything
- How do you check references, deposits and progress claims properly
- What are the red flags, and what are your remedies
- Frequently asked questions
Most advice about hiring a builder is a list of feelings. Get three quotes, check they turn up on time, trust your gut. In New Zealand that wastes the best tool a homeowner has, because the question of how to find a licensed builder has a documented answer here that it does not have in every market: there is a real statutory licence, and a public register you can search before you take a single call.
The scheme is the Licensed Building Practitioner, or LBP. It exists because the parts of a house that hold it up and keep the water out are legally defined as Restricted Building Work, and that work must be carried out or supervised by a licensed person. So verification does not start with a reference. It starts with a licence number, a register, and a check that the class matches the work you are asking for.
New Zealand gives you a statutory licence to check and a public register to check it in. Verification is a search, not a hunch.
What follows is the order a project manager works in: the register check, the licence class, the paperwork a builder must hand you before you sign, the references done properly, and the remedies if it still goes wrong. It assumes you already know what the job should cost, which is where estimating the renovation cost comes first. Whether a builder runs your job or you are managing your own renovation without a project manager, these verification checks come before any trade starts.
Why New Zealand gives you a real licence to check
Because a licensing scheme sits under the Building Act 2004, and it has teeth that a trade-association badge does not. An LBP has been assessed as competent in a specific licence class, is bound by a code of ethics, is accountable to the Building Practitioners Board, and can be disciplined. None of that is true of an unlicensed builder, however good their photographs are.
That changes what a homeowner is actually doing. In markets without a builder's licence, choosing one is an exercise in reading character. Here, character is the last check, not the first. The first is a search on the public LBP register, which tells you whether a person is licensed, which classes they hold, whether the licence is current, and whether they have been disciplined in the last three years. It is free, it takes two minutes, and it is the highest-value thing a homeowner can do.
How to find a licensed builder in New Zealand: the five checks
Run these in order. Each narrows the field on evidence rather than impression, and the later checks are only worth doing on a builder who passed the earlier ones.
- Ask for the LBP number, then search the register yourself. A licensed builder gives it without hesitation. Confirm the name matches, the licence is current, and there is no recent disciplinary history — a screenshot or a logo on a website is not proof.
- Check the licence class matches your work. The scheme licenses by class: Carpentry, Design 1 to 3, Site 1 to 3, Foundations, Brick and Blocklaying, External Plastering and Roofing. A Carpentry licence does not authorise design work, and a licence in one class is not a licence in another.
- Check the other registers, because not every trade is an LBP. Electricians sit on the Electrical Workers Registration Board's register. Plumbers, gasfitters and drainlayers are registered with the Plumbers, Gasfitters and Drainlayers Board. A builder who says one licence covers everything is telling you something useful about themselves.
- Ask what they will issue, not just what they will do. An LBP who carries out or supervises Restricted Building Work must provide a Record of Work. The council needs those records before it will issue the Code Compliance Certificate, so a builder who is vague about them will hold up your sign-off.
- Then, and only then, weigh the association, the guarantee and the references. Membership of Registered Master Builders or New Zealand Certified Builders is a genuine signal and gives access to guarantee products — the Master Build Guarantee and the Halo Residential Guarantee — but membership is not a licence and a guarantee is not the law. It is the layer above verification, never the substitute.
A licence number takes two minutes to verify on a government register that also shows disciplinary history. It is the cheapest due diligence in the entire project.
Almost nobody does it. That is why an unlicensed builder can operate for years on a website, a truck sign, and a stack of testimonials.
What is Restricted Building Work, and who is allowed to do it
Restricted Building Work is the legal category that decides who may touch the important parts of your house. It covers the structural and weathertightness work on a home that needs a building consent — the primary structure, the roof and cladding, and the design of them. That work must be carried out or supervised by an LBP holding the matching licence class.
Whether your job includes Restricted Building Work depends on whether it needs a consent and what it touches, which is set out in the guide to whether you need a building consent. Where an engineer is involved — a new opening in a load-bearing wall, a foundation, a retaining structure — the council will usually also want a producer statement: PS1 for the design and PS4 for the construction review, issued by a chartered professional engineer. Those documents, with the LBP's Record of Work, are what the council relies on to close the file.
The practical consequence is simple. If the work is Restricted Building Work and the builder is not licensed for it, the job is not merely riskier. It is unlawful, and your Code Compliance Certificate is the thing that pays for it.
Know the number before you take the first call
The free Renovation Cost Calculator gives you a trade-by-trade estimate in under 5 minutes — before your first trade conversation. A builder cannot anchor a price on a homeowner who already has one.
What must a builder give you before you sign anything
More than most homeowners ever ask for, and all of it before the contract. Under the Building Act and the Building (Residential Consumer Rights and Remedies) Regulations 2014, a building contractor must give you a disclosure statement and a prescribed checklist before you enter into a contract, whenever the work will cost $30,000 or more including GST — and at any value if you ask for them.
The disclosure statement is not a formality. It sets out the contractor's legal status, their dispute history, the skills, qualifications and licensing of the people who will actually do the work, the business history of the directors, and the insurance and guarantee cover they carry. Read it and you are holding the builder's record before you sign anything.
Above that same threshold, the contract must be in writing, and the Regulations prescribe its contents: the parties, the site, a detailed scope of works, who obtains the consents, the expected start and completion dates, the price or how it is calculated, the payment arrangements, how a variation will be agreed, how defects will be remedied, and the dispute resolution process. A builder who says a handshake is how they have always done a job this size is describing a breach, and Consumer Protection and MBIE take complaints about it. Reading what comes back on price is set out in how to read a renovation quote.
How do you check references, deposits and progress claims properly
A reference call that asks "were you happy?" produces a useless answer. The prepared homeowner asks about the two things that actually reveal a builder: what happened when the job went wrong, and what happened when the money moved.
So ask to visit a completed job, not to look at photographs of one. Ask the previous client how variations were priced and approved — before the work was done, or after it appeared on an invoice. Ask how long the defects list took to clear after practical completion, and whether the builder came back willingly. Ask whether the project finished near its original price. A builder comfortable with those questions being put to past clients is telling you how the next twelve months will go.
Money is the other tell. The law prescribes what a residential contract must contain, including the payment arrangements, but it does not cap a deposit — so an oversized deposit is a commercial red flag, not an illegal one, and the protection is a payment schedule tied to progress rather than to the calendar. Progress claims should map to work actually completed, and under the Building Act's implied contract terms you have 20 working days to pay a written claim. A builder who wants a large sum up front, before materials are ordered, is asking you to fund their cash flow.
Do not ask a past client whether they were happy. Ask them what went wrong, and what the builder did about it.
Every project has a problem. The reference you want is not a project without one — it is a builder who fixed one without being forced to.
What are the red flags, and what are your remedies
Four signals should end a conversation. A builder who will not give an LBP number, or whose number does not check out. A builder who offers a discount for cash without GST — anyone turning over more than $60,000 a year must be registered for GST, so the offer is either tax evasion or a confession about the size of the operation, and it strips the paper trail you would need later. A builder who resists a written contract on a job over $30,000. And a builder who wants a deposit large enough that walking away would hurt you more than them.
If it does go wrong, the remedies are stronger than most homeowners realise, and they exist whether or not they appear in the contract. You have an automatic 12-month defect repair period: notify a defect in writing within twelve months of completion and the builder must fix it, and it is on them to prove it was not their fault. Beyond that, the Building Act's implied warranties apply for up to ten years, whether or not a contract exists — after the first twelve months the burden of proof shifts to you. Those warranties also pass to a subsequent owner.
Where a dispute cannot be settled, the Disputes Tribunal hears claims up to $60,000, a limit lifted from $30,000 on 24 January 2026, and no lawyer can represent you there. Larger claims go to the District Court. Complaints about a contractor who failed to provide the disclosure statement, the checklist or a written contract go to MBIE, and the full set of homeowner rights is published by Building Performance. The 12-Phase System puts this sequence — verify, document, then contract — in the homeowner's hands before the first trade is booked.
Run the project, do not be run by it
Every Renovation Blueprint is built around The 12-Phase System: the verification, the documents to demand, the hold points to hold, and the sign-offs that close a New Zealand job properly.
If the cost baseline is the right first step, use the free Renovation Cost Calculator — a trade-by-trade estimate for your specific project, in under 5 minutes, before any builder has quoted.
Frequently asked questions
How do I check if a builder is licensed in New Zealand?
Ask for their Licensed Building Practitioner number and search it yourself on the public LBP register. The register confirms whether the person is licensed, which licence classes they hold, whether the licence is current, and whether they have been disciplined in the last three years. Do not rely on a logo, a screenshot, or a claim on a website.
Does every builder in New Zealand have to be licensed?
Not for every job, but Restricted Building Work — the structural and weathertightness work on a home that needs a building consent — must be carried out or supervised by a Licensed Building Practitioner holding the matching licence class. Straightforward non-structural work generally does not. If your job includes Restricted Building Work and your builder is not licensed for it, the work is unlawful.
What is a Record of Work, and why does it matter?
It is the memorandum an LBP must provide for any Restricted Building Work they carried out or supervised. It goes to you and to the council, and the council needs it before it will issue the Code Compliance Certificate. A builder who is vague about issuing one is a builder who will hold up your sign-off.
Do I need a written contract with my builder?
Yes, if the work costs $30,000 or more including GST. The Building (Residential Consumer Rights and Remedies) Regulations 2014 require a written contract at or above that threshold, and the builder must give you a disclosure statement and a prescribed checklist before you sign. Below the threshold you can request both, and the builder must provide them.
What can I do if the building work turns out to be defective?
Notify the builder in writing. For twelve months after completion you have an automatic defect repair period: the builder must remedy the defect at their cost, and the burden is on them to prove it was not their fault. The Building Act's implied warranties then apply for up to ten years, though after twelve months you must prove the defect. Disputes up to $60,000 can go to the Disputes Tribunal.
Is a Master Build or Halo guarantee the same as a licence?
No. A licence is a statutory requirement under the Building Act; a guarantee is an optional product offered through a trade association such as Registered Master Builders or New Zealand Certified Builders. A guarantee can be valuable, but it does not replace the LBP register check, and it is not the source of your 12-month defect repair period or ten-year implied warranties, which you have by law.