Should Your Builder Be Insured? What NZ Homeowners Need to Know

Why a builder’s insurance matters

When you’re hiring a builder, you’re not just paying for labour and materials — you’re also relying on them to manage risk on your property. Even a careful, experienced builder can have an accident, damage nearby property, injure a visitor, or leave you exposed if something goes wrong during the job.

In New Zealand, insurance doesn’t replace good workmanship, and it won’t stop you needing to check a builder’s reputation, licence status, and quotes. But it can make the difference between a manageable problem and a costly dispute.

A builder’s insurance may protect:

• your home and neighbouring properties from accidental damage
• people on or near the site if someone is injured
• the builder’s business if their tools, vehicles, or works are stolen or damaged
• the homeowner, if the builder has cover for contract works or professional negligence

For homeowners, the key question is not just “are they insured?” but “what exactly are they insured for, and is it current?”

The main types of insurance a builder may carry

Different builders carry different policies depending on their business size and the type of work they do. Not every policy is mandatory, but several are strongly worth having.

Public liability insurance

This is one of the most important policies to ask about. Public liability insurance is designed to cover accidental injury to other people, or accidental damage to property that the builder does not own.

Examples include:

• a dropped timber or tool damaging a car on the street
• an unattended site causing a trip hazard for a neighbour or delivery driver
• damage to a neighbour’s retaining wall or fence during excavation or demolition

For homeowners, this cover can be especially important during renovations where the work is close to occupied spaces, driveways, boundaries, or shared accessways.

Contract works insurance

Also called construction insurance, this covers the building project itself while the work is underway. It can be particularly relevant for renovations, extensions, reclads, or new builds, where the partially completed work may be exposed to weather, theft, fire, or accidental damage.

This is useful because standard home insurance does not always fully cover work in progress, especially if the insurer has not been told about major alterations.

Check who is responsible for arranging this cover:

• sometimes the builder arranges it
• sometimes the homeowner does
• sometimes both policies need to be coordinated to avoid gaps

Don’t assume it’s automatically included in the quote.

Professional indemnity insurance

Not every builder needs this, but it becomes more relevant if they are also providing design input, technical advice, or project management that affects the finished result.

Professional indemnity insurance can help with losses caused by mistakes in advice, drawings, specifications, or coordination. For example, if a builder takes on a broader design-and-build role, this type of cover may be worth asking about.

Tools, plant, and vehicle cover

These policies don’t directly protect the homeowner’s property, but they can still matter. If a builder’s tools are stolen or their vehicle is off the road, the job can stall — especially if the work is in a busy winter period, when weather delays already put pressure on programmes.

A builder with properly insured gear is usually better placed to keep the job moving.

What insurance does — and doesn’t — protect the homeowner from

Insurance is useful, but it is not a substitute for due diligence. A homeowner should understand what protection they are actually getting.

Insurance can help with:

• accidental damage during the build
• injury or property damage claims from third parties
• project delays caused by insured events
• the builder’s ability to recover after theft or a major incident

Insurance usually does not cover:

• poor workmanship that doesn’t meet the contract or Building Code requirements
• disputes about scope, delays, or variation pricing
• defects caused by bad design if the builder is not the designer
• damage caused by work done by unlicensed or unqualified trades where separate rules apply

That last point matters. If your project includes plumbing, gasfitting, drainage, or electrical work, those trades are separately regulated in New Zealand. Plumbing, gasfitting, and drainlaying are restricted work under the Plumbers, Gasfitters and Drainlayers Board (PGDB), and electrical work is regulated by the Electrical Workers Registration Board (EWRB). A builder may organise these trades, but the actual work must be done by appropriately authorised people.

What NZ homeowners should check before hiring

A good builder should be comfortable proving their cover. Ask for evidence early — ideally before you sign anything or pay a deposit.

Ask for these documents

• a current certificate of currency for public liability insurance
• confirmation of contract works insurance, if the builder says they provide it
• details of any excesses and policy limits
• the legal name of the insured entity, which should match the quote or contract
• the insurer’s name and policy expiry date

If the builder hesitates or says they can “send it later”, treat that as a warning sign. Written evidence is the normal standard.

Check the amounts covered

There is no one-size-fits-all figure, but the policy should be proportionate to the job. A small repair job may need a different level of cover from a multi-room renovation or a new build.

Look at:

• the liability limit per event and in the aggregate
• any exclusions for roofing, excavation, demolition, or water damage
• whether subcontractors are included
• whether the policy covers work at your address and for the type of project you are planning

If the work is high-risk — for example, around pools, steep sections, retaining walls, or weather-exposed cladding — ask the builder how their insurance interacts with those risks.

How to confirm the cover is real

It’s sensible to verify the paperwork, not just take a verbal assurance.

Practical steps for homeowners

1. Ask for a certificate of currency

   • This is the simplest proof that a policy is current.
   • It should show the insurer, policy number, insured name, and expiry date.

2. Match the insured entity to the contract

   • If the quote is from one company but the insurance is in another name, ask why.
   • Make sure the entity doing the work is the one actually insured.

3. Check the work type is covered

   • Some policies exclude certain activities such as roofing, underpinned work, house lifting, or excavation beyond a depth.
   • If your project includes specialist work, ask for confirmation in writing.

4. Confirm subcontractors are covered

   • Many builders use subcontractors.
   • Ask whether they carry their own insurance and licences where relevant.

5. Phone the insurer or broker if needed

   • If you are still unsure, you can ask the insurer or broker to confirm that the policy is current and that the activity is covered.
   • They may not disclose every detail, but they can often confirm the policy exists.

Insurance should sit alongside other checks

Insurance is only one part of hiring a builder safely. In New Zealand, also check:

• whether the builder is a Licensed Building Practitioner if the work requires one
• whether the work needs building consent from your local council
• whether the builder has solid references from recent clients
• whether the quote is detailed and in writing
• whether the schedule, variations process, and payment terms are clear

For many homeowners, the Building Act and consenting rules can feel confusing. As a general guide, structural building work, certain alterations, additions, and some waterproofing-related work may need building consent. A builder should not guess or downplay that requirement. If they tell you consent is unnecessary, ask them to show you the basis for that advice, or check with your council.

Also be cautious if a builder offers a very low price but cannot clearly explain insurance, consenting, or subcontractor arrangements. In the current NZ market, where labour and materials can be expensive and schedules tight, a quote that seems too good to be true may have hidden risk attached.

Questions to ask before you sign

You do not need to be an insurance expert to protect yourself. A few direct questions are enough.

• What insurance do you carry for this job?
• Can you send me a current certificate of currency?
• Does your public liability cover accidental damage to neighbouring properties?
• Who arranges contract works insurance for this project?
• Are subcontractors covered, and do they carry their own insurance?
• Are there any exclusions I should know about?
• What is the excess if there is a claim?

If the builder gives clear, written answers, that is a good sign. If they are vague, defensive, or unwilling to provide documents, consider it a red flag.

Red flags to watch for

Be careful if a builder:

• says insurance is “not really necessary”
• cannot produce a current certificate of currency
• wants cash without paperwork
• refuses to confirm who is legally responsible for the work
• cannot explain whether the project needs consent or which trades will be involved
• uses subcontractors but cannot explain how they are managed

These signs do not automatically mean the builder is unreliable, but they do mean you should slow down and ask more questions.

A sensible process for homeowners

A good hiring process is usually simple and methodical:

• get at least two or three written quotes
• compare the scope, not just the price
• check the builder’s insurance and credentials
• confirm whether building consent is needed
• agree on a written contract before work starts
• keep copies of all emails, certificates, and variations

That extra diligence can save time and stress later, especially on larger renovations where multiple trades, weather, and council inspections may all affect the programme.

The bottom line

Yes — your builder should ideally be insured, and you should know exactly what that insurance covers. Public liability is the key one to ask about, but contract works, professional indemnity, tools, and subcontractor arrangements may also matter depending on the job.

The goal is not to overcomplicate the hiring process. It is to make sure that if something goes wrong, you are not left carrying the full cost. Ask for written evidence, confirm the cover suits the work, and combine that check with the usual due diligence: multiple quotes, references, licence checks, and a clear contract before any work starts.