Why insurance matters when hiring a plumber
A good plumber does more than fix leaks and install fittings. They are working inside your home, often around walls, flooring, cabinetry, hot water systems and, in some cases, gas or drainage. If something goes wrong, the cost can quickly move beyond the original job price.
Insurance is one of the simplest ways to reduce that risk. It does not replace proper licensing, workmanship or contracts, but it can help cover accidental damage, injuries, and claims arising from mistakes. For NZ homeowners, that matters because many plumbing jobs are taking place in occupied homes, rental properties, older villas, weather-damaged houses or renovations where one problem can affect several trades.
It is worth remembering that not every plumber carries the same level of cover. Some sole traders and small businesses are fully insured; others may have only limited cover, or none at all. Before you accept a quote, ask what insurance they hold and whether it is current.
The main types of insurance a plumber should carry
Here are the main policies to ask about when comparing plumbers in New Zealand.
| Insurance type | What it covers | Why it matters to you |
|---|---|---|
| Public liability insurance | Damage to your property or injury to other people caused by the plumber’s work | Helps pay if a pipe is damaged, water floods a room, or a visitor is injured on site |
| Professional indemnity insurance | Claims for errors, faulty advice or design-related mistakes | Useful if the plumber gives advice or specifications that lead to costly rework |
| Contract works insurance | Work in progress, materials, and sometimes damage to the job before completion | Helpful on renovations or larger installs where several days of work may be exposed to theft or damage |
| Vehicle/tools cover | Theft or damage to tools, van, and sometimes specialist equipment | Helps the plumber stay on the job if their equipment is stolen or damaged, especially in busy urban areas |
| Employers’ liability / workers’ cover | Protection for employees injured at work, often alongside ACC arrangements and business policies | Important if the business has staff or subcontractors working on your property |
Public liability is the big one most homeowners ask about first, because it addresses the most obvious risk: accidental damage to your home or injury to someone else. But it is not the only policy worth asking about.
What public liability insurance actually does
Public liability insurance is designed to cover accidental damage or injury caused to third parties. In practice, for plumbing work, that could include:
- a burst fitting flooding a hallway or downstairs flat
- an incorrectly connected appliance causing water damage to kitchen cabinetry
- a ladder or tool injuring a visitor or neighbour
- damage to a carpet, benchtop or appliance during the job
It can also help with legal costs if someone makes a claim against the business.
What it usually does not cover is poor workmanship that simply needs to be fixed at the plumber’s expense, although some claims can become more complex if workmanship leads to damage. A liability policy is not a warranty for every mistake. That is why you still need a written quote, clear scope of work and proper licensing.
Why professional indemnity can matter too
Professional indemnity insurance is less commonly discussed by homeowners, but it can be relevant for plumbing work that involves advice, specifications or system design.
For example:
- specifying the wrong product for a hot water upgrade
- miscalculating pressure, capacity or fall in a drainage-related job
- giving advice that leads to non-compliant or unsuitable installation decisions
Not every plumber will hold this cover, and not every job requires it. However, if your project is a renovation, bathroom fit-out, new build or upgrade involving multiple systems, it is reasonable to ask whether they carry it.
How insurance helps protect you as the homeowner
Insurance is not just a box-ticking exercise. It can protect you in practical ways:
- It reduces the chance you pay for accidental damage. If a plumber causes water damage, liability cover may help meet the claim.
- It can keep a job moving. If a business has tools or vehicle cover, it is less likely to be delayed by theft or equipment loss.
- It can give you a route for recovery. If there is a dispute, a properly insured business is often easier to deal with than an uninsured one.
- It shows the business is more professional. While not proof of quality, insurance often goes hand in hand with better systems and record-keeping.
That said, insurance is not a substitute for hiring the right person. You still need to check their licence, experience and references.
Licensing, consents and insurance are different things
In New Zealand, plumbing, gasfitting and drainlaying are restricted work and must be carried out or supervised by appropriately licensed people under the Plumbers, Gasfitters and Drainlayers Board (PGDB). If you are hiring for this work, ask to see their current licence details.
Also, some plumbing-related projects may need additional approvals:
- Building consent: Certain bathroom renovations, hot water system changes, drainage alterations or structural work may require a consent from your local council.
- Gasfitting: Gas work is separately regulated and must be done by licensed gasfitters.
- Electrical work: If the job involves pumps, hot water cylinders, controls or power supply changes, electrical work is regulated by the Electrical Workers Registration Board (EWRB) and may need a registered electrician.
Insurance does not replace any of these requirements. A plumber can be fully insured and still not be allowed to do certain work.
What to ask before you hire
Before you accept a quote, ask the plumber these specific questions:
- Are you currently licensed with the PGDB for the work required?
- Do you carry public liability insurance? What is the cover limit?
- Do you have professional indemnity insurance, especially for renovation or design-related work?
- Is your insurance current, and who is the insurer?
- Does your cover apply to subcontractors if they are used?
- Are there any exclusions I should know about?
- Can you provide a certificate of currency or evidence of cover?
A reputable plumber should be able to answer these questions without hesitation. If they are vague, defensive or refuse to provide evidence, that is a warning sign.
How much cover is enough?
There is no single legal minimum for every plumbing business in New Zealand. The right amount of cover depends on the size and type of work.
For a minor repair, a lower cover limit may be common. For a bathroom renovation, hot water upgrade, commercial job or work in a multi-storey property, you may reasonably expect higher limits. The key point is not to choose based on the biggest number alone, but on whether the cover is proportionate to the risk.
When comparing quotes, look at the whole package:
- scope of work
- labour and materials
- licence details
- insurance cover
- timeline
- exclusions
- whether the quote is fixed or estimated
A cheaper quote from an uninsured tradesperson can become expensive very quickly if a pipe bursts, a wall is damaged or there is a claim from a neighbour or tenant.
How to confirm the plumber is properly insured
There are several practical ways to check.
1. Ask for a certificate of currency
This is the simplest proof of current insurance. It usually shows:
- the insurer’s name
- the policy holder
- the type of cover
- the policy dates
- any relevant limits
Check that the policy is in date on the day the work is being done, not just when the quote was issued.
2. Match the policy to the business name
Make sure the insurance is held by the same legal entity you are hiring. For example, a sole trader, partnership or company may all have different names on invoices, websites and policy documents.
3. Verify the licence
For plumbing, gasfitting and drainlaying, confirm the person is licensed through the PGDB. If the work includes gas or drainage, check the correct class of licence.
4. Check who is actually doing the work
If the business uses subcontractors, ask whether they are individually licensed and insured, or whether the main contractor’s policy extends to them. Do not assume it does.
5. Get the scope in writing
A written quote or contract should state what is included and who is responsible for what. This matters if damage occurs and there is disagreement about whether the task was inside or outside the quoted work.
Red flags to watch for
Be cautious if a plumber:
- says insurance is unnecessary
- will not show proof of cover
- offers only vague verbal assurances
- is unable to explain their licence status
- pressures you to start immediately without a written quote
- suggests cash-in-hand arrangements to avoid paperwork
These may be signs of poor business practices, not just a lack of insurance. For homeowners, that can mean a greater chance of disputes if something goes wrong.
Practical tips for NZ homeowners before work starts
A few simple steps can save a lot of trouble later:
- Get at least two or three written quotes for larger jobs.
- Ask for licence and insurance details before accepting a price.
- Check whether your own home insurance has any relevant excesses or requirements.
- If the job is part of a renovation, confirm whether council consent is needed before work starts.
- Keep copies of the quote, invoices, insurance evidence and any emails or text messages.
- Take photos before the job begins, especially in older homes or where there is existing damage.
This is especially useful in New Zealand’s older housing stock, where hidden leaks, corroded pipes and previous DIY work can complicate repairs. It is also sensible during winter, when burst pipes and water ingress risks can be higher in colder regions.
The bottom line
Yes — your plumber should ideally be insured, and public liability cover is the most important policy to ask about. For larger or more complex work, professional indemnity and contract works insurance may also matter. Insurance does not replace licensing, building consent or quality workmanship, but it gives you an important layer of protection if something goes wrong.
Before you hire, compare written quotes, verify the plumber’s PGDB licence, and ask for evidence of current insurance. A professional tradesperson should expect those questions — and answer them clearly.
Master Plumbers
