Hiring a builder is a big investment, and making sure they carry the right insurance before work begins is one of the most important steps a homeowner can take. While there is no single law in New Zealand that mandates every type of builder's insurance, several policies are considered essential by industry standards — and some may be required under your own home insurance policy or a building contract. Asking to see proof of insurance before signing anything is not rude; it's smart.
Why Builder Insurance Matters
Building work carries real risks: accidental damage to your property, injuries on site, defects discovered after the job is done, or a contractor going out of business mid-project. Without the right cover in place, you as the homeowner could end up footing the bill. Understanding what each policy covers helps you ask the right questions before work starts.
The Key Types of Insurance a Builder Should Hold
Public Liability Insurance
Public liability insurance is the most fundamental cover a builder should carry. It protects against claims for accidental damage to your property or injury to a third party caused by the builder's work or negligence. For example, if a tradesperson accidentally breaks a water pipe and floods your home, public liability should cover the repair costs.
Most reputable NZ builders carry at least $1 million in public liability cover, though $2 million or more is common on larger residential projects. Always ask to see the certificate of currency (proof the policy is current) before work begins.
Contract Works Insurance
Contract works insurance (sometimes called construction all-risk insurance) covers the building project itself while it is under construction. This includes damage to materials and work in progress caused by events like fire, storm, flood, vandalism, or accidental damage.
This is particularly important in New Zealand given our exposure to earthquakes, high winds, and heavy rainfall. Either the builder or the homeowner can hold this policy — your building contract should clearly state who is responsible. If you are the owner-builder or the contract places this obligation on you, check with your home insurer whether your existing policy extends to cover works under construction, as many standard policies do not.
Tools and Equipment Insurance
Tools insurance covers the builder's own tools and equipment against theft or damage on site. While this protects the builder rather than you directly, a builder without it may face costly delays if tools are stolen — delays that affect your project timeline and potentially your costs.
Professional Indemnity Insurance
Professional indemnity (PI) insurance covers claims arising from professional advice, design, or errors in specification. This is especially relevant if your builder is also acting as a designer or project manager, or if they are a Licensed Building Practitioner (LBP) carrying out or supervising restricted building work. PI cover means that if a design decision or professional recommendation leads to a defect, there is a policy to claim against.
Not all builders carry PI insurance, but it is worth asking about — particularly on complex or high-value projects.
Statutory Liability Insurance
Statutory liability insurance covers fines and legal costs arising from unintentional breaches of New Zealand legislation, such as the Building Act 2004 or the Health and Safety at Work Act 2015. It is not universally held but is a sign of a professional, well-organised building business.
What About Your Own Home Insurance?
Before building work starts, notify your home insurer. Many policies have conditions around construction activity, and some may be voided or reduced if you fail to disclose significant works. Your insurer may recommend a specific contract works policy or adjust your cover for the duration of the project. This is a step many homeowners overlook.
LBPs and Restricted Building Work
Under the NZ Building Code and the Building Act, certain work — including structural, weathertightness, and fire-safety elements — must be carried out or supervised by a Licensed Building Practitioner. LBPs are required to issue a Record of Work on completion. While LBP licensing does not automatically mean a builder carries all the insurance types above, it does indicate a level of professional accountability. Always verify both licence status and insurance separately.
For guidance on what requires a building consent versus what falls under Schedule 1 exemptions, check with your local council or visit MBIE Building Performance.
A Quick Insurance Checklist
| Insurance Type | Who It Protects | Recommended? |
|---|---|---|
| Public Liability | You and third parties | Yes — essential |
| Contract Works | The project itself | Yes — essential |
| Tools & Equipment | Builder's tools | Yes — good practice |
| Professional Indemnity | Design/advice errors | Yes — for complex projects |
| Statutory Liability | Legal/regulatory breaches | Recommended |
When to Call a Professional
If you are unsure whether a builder's insurance is adequate for your specific project, speak to an independent insurance broker before signing a building contract. For disputes about building work or defective construction, Consumer NZ and MBIE Building Performance both offer guidance on your rights. You can find qualified, insured local builders through tradedirectory.co.nz.
Sources & Further Reading
- MBIE Building Performance — Building Act and consents
- Licensed Building Practitioners — LBP register and licence verification
- BRANZ — Building research and best practice
- Consumer NZ — Hiring a builder and your rights
- WorkSafe NZ — Health and safety on construction sites
- Standards NZ — NZ Building Standards
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