Questions to Ask a Plumber Before You Hire Them

Why asking the right questions matters

Hiring a plumber is not just about finding someone who can turn up quickly. In New Zealand, plumbing, gasfitting and drainlaying are restricted activities, so the person you hire needs the right qualifications and authorisations for the work involved. The right questions help you confirm they’re properly licensed, insured, experienced with your type of job, and clear about cost and timing before any work starts.

Asking upfront also helps you avoid common problems such as unfinished work, unexpected extra charges, delays waiting for parts, and compliance issues if the job needs a consent or inspection. Whether you’re fixing a leaking tap, replacing a hot water cylinder, or planning a bathroom renovation, a short conversation now can save a lot of stress later.

1) Are you licensed for this type of work?

This is the first question to ask, and it should be non-negotiable. In New Zealand, plumbing, gasfitting and drainlaying are regulated under the Plumbers, Gasfitters and Drainlayers Act, and practitioners should be authorised through the Plumbers, Gasfitters and Drainlayers Board (PGDB). Ask the plumber:

• What licence class do you hold?
• Are you the person who will do the work, or will a subcontractor attend?
• Can I see your licence or registration details?
• Is this job plumbing, gasfitting, drainlaying, or a combination?

A good plumber should be able to explain which parts of the job they’re licensed to carry out and whether any specialist trades are needed. If the job involves gas appliances or pipework, make sure the person is specifically licensed for gasfitting. If it involves drains, they’ll need drainlaying authorisation.

If the work overlaps with other trades, ask how coordination will happen. For example, a bathroom renovation may involve a plumber, a tiler, and possibly a builder. Electrical work is separate and must be done by a person authorised under the Electrical Workers Registration Board (EWRB) rules.

2) Have you done this kind of job before?

Experience matters, especially if your job is outside a simple repair. A plumber who regularly handles blocked sinks may not be the best fit for a full bathroom refit, a low-pressure hot water issue, or a replacement cylinder in a tight ceiling cavity.

Ask:

• How many similar jobs have you completed?
• Have you worked on homes of this age or style?
• Have you dealt with the same brand or type of fixture/appliance?
• Are there common issues I should know about for this kind of work?

For older NZ homes, this is particularly useful because you may have older pipework, awkward access, or previous DIY changes that affect the job. In colder regions and during winter, plumbers are often busiest with hot water problems, burst pipes and heating-related work, so it helps to confirm they’re comfortable working under pressure and can advise on likely delays.

3) Are you insured, and what does it cover?

Insurance is one of the most overlooked questions, but it can make a big difference if something goes wrong. Ask for proof of current insurance and find out what it covers.

Useful questions include:

• Do you have public liability insurance?
• Are you covered for accidental damage to my property?
• Do you have insurance for the tools and materials you bring on site?
• If a subcontractor is used, are they insured too?

Public liability insurance is important because it helps cover accidental damage or injury linked to the work. It doesn’t replace workmanship guarantees or consumer rights, but it gives you extra protection. If the plumber hesitates to provide evidence of insurance, treat that as a warning sign.

4) Can you give me a written quote, not just an estimate?

Always ask for a written quote. A quote should spell out what is included and, just as importantly, what is not. Estimates can change more easily, especially if the job reveals hidden problems once work begins.

Ask the plumber to confirm:

• The total price or hourly rate
• What labour and materials are included
• Call-out or site visit fees
• Whether the price includes GST
• Any after-hours, weekend or public holiday surcharges
• How variations will be approved if extra work is needed

For many household jobs in New Zealand, prices can vary widely depending on access, location, urgency and the age of the property. A simple tap repair may be relatively straightforward, while a cylinder replacement or drain issue may require additional testing, parts or subcontractors. Getting 2–3 written quotes is sensible, especially for larger jobs, because it helps you compare scope as well as price.

A quick quote comparison checklist

5) What exactly is included in the job?

This is the best way to avoid “I thought that was included” arguments later. A plumber should clearly explain the full scope before starting.

Ask:

• What work will you do, step by step?
• Will you supply the parts and fittings, or do I need to buy them?
• Are disposal or clean-up costs included?
• Will you test the system and leave it ready to use?
• If you find another issue, how will you tell me before continuing?

This matters a lot for bathroom or kitchen work where multiple fixtures may be involved. It also matters for hidden issues such as damaged valves, ageing pipework, or low water pressure that only become obvious once the job starts.

6) How soon can you start, and how long will it take?

Timing is one of the biggest sources of frustration for homeowners. Be specific about your deadline and ask the plumber to be specific about theirs.

Questions to ask:

• When can you inspect the job?
• When could you start?
• How long will the work take?
• Will you need to return for a second visit?
• What could delay the job?

In New Zealand, timing can be affected by local demand, weather, and parts supply. Winter often brings more urgent plumbing call-outs, while pre-summer is a busy time for renovations and hot water upgrades. If you’re planning a renovation, allow extra time for permits, council processing and other trades.

If the plumber is vague about dates, ask for at least a likely start window and completion timeframe in writing.

7) Could this job need council consent or another approval?

Not every plumbing job needs council consent, but some bigger jobs do, especially where building work is involved or where the work affects structural elements, major bathroom changes, drainage, or hot water systems in a way that triggers compliance requirements. You should also be aware that electrical work is separate and may need its own compliance paperwork.

Ask:

• Does this work require building consent, plumbing certification, or any other approval?
• Will you organise any required inspections?
• Will you provide the paperwork I need for council records or future sale of the house?
• If another trade is needed, will you coordinate that?

If you’re not sure, a reputable plumber should be able to explain the likely process and tell you when you need to check with your local council. For more complex work, it’s worth confirming responsibilities before the project starts, not halfway through.

8) Do you guarantee your workmanship?

A workmanship guarantee tells you what happens if there’s a problem related to the plumber’s work after the job is finished. It’s not the same as a manufacturer’s warranty on a tap, mixer or cylinder.

Ask:

• Do you offer a workmanship guarantee?
• How long does it last?
• What does it cover?
• What doesn’t it cover?
• If something leaks or fails, how do I get it fixed?

Also ask about product warranties for any supplied parts. If you choose your own fittings, check whether that affects the plumber’s guarantee. Keep invoices and product details together in case you need them later.

9) Can you provide references or recent examples of similar work?

References are especially useful if the job is larger than a routine repair. A plumber who is confident in their work should be able to provide recent customer references, photos of similar jobs, or both.

Useful questions include:

• Can you share recent references from similar work?
• Do you have photos of completed jobs?
• Have you worked in homes like mine before?
• Can I check online reviews as well?

When reading reviews, look for patterns rather than one-off comments. Consistent feedback about punctuality, clear communication and clean workmanship is more useful than a handful of vague star ratings. If possible, ask references whether the plumber kept to the quote, communicated delays, and resolved any issues after completion.

10) Who will I be dealing with on the day?

If you’re hiring through a plumbing company, the person who gives the quote may not be the person who comes to your house. That’s not necessarily a problem, but it’s good to know.

Ask:

• Will the same person do the job?
• Will you send an apprentice or trainee, and will they be supervised?
• Who is my contact if I have questions?
• How do you handle access if I’m not home?

Knowing who’s attending helps with security, communication and expectations. If you’re arranging work while you’re at work, confirm arrival times, access arrangements and how you’ll receive updates.

A practical checklist before you say yes

Before you hire a plumber, make sure you can tick off these essentials:

• Licence checked and appropriate for the work
• Insurance confirmed
• Written quote received
• Scope of work clearly explained
• Timeframe agreed
• Any consent or compliance questions answered
• Guarantee or warranty explained
• References or reviews checked

If anything is unclear, ask again before work begins. A professional plumber should welcome reasonable questions.

Final tips for Kiwi homeowners

A good plumber will be clear, specific and happy to put important details in writing. That’s especially important in New Zealand, where weather, older housing stock and compliance requirements can all affect a job.

For most homeowners, the best approach is simple:

• Get at least 2–3 written quotes for larger jobs
• Check the plumber’s PGDB licensing details
• Confirm insurance and guarantees
• Ask about consents, testing and paperwork where relevant
• Choose the person who gives the clearest advice, not just the lowest price

Spending a little time asking the right questions now can save you money, reduce risk and help you hire a plumber who will do the job properly the first time.