Why it pays to ask the right questions first
Gas fitting is not a job where you want to guess or cut corners. In New Zealand, gasfitting is restricted work, so the person you hire must be properly authorised and competent to do the job safely and legally. Whether you need a new gas hob connected, a continuous-flow hot water system installed, or a fault diagnosed before winter, the questions you ask up front can save you money, delays, and compliance problems later.
A good gasfitter should be happy to answer clear, practical questions. If they are vague, pushy, or reluctant to provide documentation, treat that as a warning sign. The goal is to compare tradespeople fairly and choose someone who is qualified, insured, and experienced with the type of work you need.
Start with the basics: are they properly licensed and registered?
In New Zealand, plumbing, gasfitting, and drainlaying are regulated under the Plumbers, Gasfitters and Drainlayers Act. Before you talk price, ask:
- Are you licensed to carry out this gasfitting work? - Can you show me your practising licence and registration details? - Will the person doing the work be the licensed gasfitter, or will apprentices or subcontractors be involved?
A legitimate gasfitter should be able to confirm their licence status and explain who will actually be on site. For restricted work, you want someone who is properly authorised, not just “experienced” in a general sense.
It is also sensible to ask whether they are a member of a recognised industry body. Membership is not a substitute for licensing, but it can be a helpful sign of professionalism.
Ask about experience with your specific job
“Have you done gas work before?” is too broad. Gas fitting covers a wide range of work, and experience with one type of job does not automatically translate to another.
Ask questions like:
- Have you installed or repaired this exact type of appliance before? - Do you regularly work on homes of this age and layout? - Have you done jobs involving LPG, natural gas, or both? - Are you familiar with the brand or model I’m using? - Have you handled conversions, relocations, or upgrades like this before?
This matters because older Kiwi homes often have mixed plumbing and gas setups, tight ceiling spaces, awkward access, or ageing pipework that can affect the job. A gasfitter who has worked on similar houses will be better able to spot potential issues before they become expensive extras.
What will the gasfitter actually do, and what is excluded?
One of the most useful questions to ask is: “What exactly is included in your quote?”
Gas fitting jobs can look simple at first, but often involve extra labour, compliance checks, parts, and making good afterwards. Ask the gasfitter to spell out:
- the exact appliances or pipework being installed, repaired, or tested - whether removal of the old appliance is included - whether they will supply parts, valves, fittings, flue components, or regulators - whether they will commission the appliance and carry out safety testing - whether any patching, painting, cabinetry work, or electrical work is excluded - whether rubbish removal or site clean-up is included
If the job involves more than gas work, ask who will coordinate other trades. For example, a gas water heater or cooktop install may also require plumbing adjustments, cabinetry modification, or an electrician for nearby power points and ignition components. Electrical work is separately regulated by the EWRB, so a gasfitter should not be doing electrical work unless they are also appropriately licensed for that scope.
Ask whether your job needs a council consent or other approvals
Not every gas job needs building consent, but some projects may trigger wider compliance issues. Ask the gasfitter:
- Will this job need a building consent from my local council? - Are there any manufacturer requirements or installation standards that affect the plan? - Do I need to notify my insurer, body corporate, or landlord? - Will you provide the paperwork needed for compliance records?
If the work changes the structure of the home, affects ventilation, requires a flue through the roof or wall, or is part of a larger renovation, there may be extra approvals or coordination required. A good gasfitter will flag this early rather than leaving you to discover it mid-job.
Get a clear written quote — and compare like for like
Always ask for a written quote, not just a verbal estimate. In the New Zealand market, prices can vary a lot depending on access, the age of the home, appliance brand, travel time, and whether the job is in a main centre or a regional area.
A useful quote should show:
- labour charges, either as a fixed price or hourly rate - call-out fees, if any - parts and materials - GST - travel charges, if applicable - any assumptions or exclusions - whether the quote is fixed or subject to variation
When comparing quotes, make sure you are comparing the same scope. The cheapest quote may exclude commissioning, testing, or essential fittings. Ask each gasfitter the same questions so you can compare accurately.
Quote comparison checklist
| Question | Why it matters | |---|---| | Is the price fixed or an estimate? | Helps you understand cost risk if the job changes | | What is included in labour? | Prevents surprises for testing, travel, or follow-up visits | | Are parts supplied or billed separately? | Some quotes look cheap until fittings are added | | Are GST and disposal fees included? | Ensures you know the real total | | What could cause the price to increase? | Clarifies variables like access, hidden faults, or compliance upgrades | | How long is the quote valid for? | Material and labour costs can change quickly |
If the gasfitter discovers extra work once the job starts, ask them to stop and get your approval before proceeding with anything outside the quoted scope.
Ask about insurance and safety coverage
Insurance is easy to overlook until something goes wrong. Ask:
- Do you carry public liability insurance? - Are you covered if your work causes damage to my home or belongings? - Do you have cover for your tools and equipment? - If you use subcontractors, are they insured too?
Public liability insurance is particularly important for gas work because mistakes can cause damage, not just inconvenience. You should also ask how they manage safety on site:
- How do you isolate gas before work begins? - Do you carry out leak testing after installation or repair? - How do you check ventilation and flueing where relevant? - What do you do if you find a safety issue unrelated to the original job?
A careful answer here is reassuring. A careless one is not.
Ask how long the job will take and when they can start
Timing matters, especially in winter when gas appliances and hot water systems are under pressure. Ask:
- When could you start? - How long will the job take? - Will you need access for more than one visit? - What could delay the programme? - Do you work in the evenings or weekends if needed?
For emergency repairs, ask what counts as urgent and how they handle call-outs. For planned work, clarify whether the timing depends on parts arriving, council sign-off, or another trade finishing first.
If you are trying to get work done before winter, book early. In colder months, good gasfitters can be busy, particularly for heating and hot water jobs. In summer, scheduling may be easier, but some homeowners use the quieter season for upgrades, so it is still smart to organise ahead.
Ask what guarantees or workmanship warranties they offer
A reliable gasfitter should stand behind their work. Ask:
- Do you offer a workmanship guarantee? - How long does it last? - Is the appliance itself covered by the manufacturer, separate from your labour? - What happens if there is a leak, fault, or installation issue after the job? - How should I report a problem?
Be careful not to confuse a workmanship guarantee with a manufacturer warranty. The appliance maker may cover defects in the unit, while the gasfitter covers installation quality. Ask for both in writing where possible, along with any conditions that could void the guarantee.
Ask for recent references or proof of similar jobs
References are especially useful when the work is specialised, expensive, or part of a larger renovation. You do not need a long list — a couple of recent examples can tell you a lot.
Ask:
- Can you provide recent customer references? - Have you completed similar jobs in the last six months? - Can I see photos of comparable installations? - Do you have online reviews I can check?
When you contact references, ask practical questions:
- Was the quote accurate? - Did they arrive when promised? - Was the site left tidy? - Were there any unexpected costs? - Would you hire them again?
Photos can be useful too, but make sure they are relevant to the type of work you need, not just general promotional images.
Red flags to watch for
Not every warning sign means the person is untrustworthy, but a pattern of them should make you cautious.
Watch out for gasfitters who:
- cannot clearly explain their licence or registration - refuse to provide a written quote - give a very low price with lots of vague exclusions - pressure you to decide immediately - suggest skipping paperwork or compliance steps - are unwilling to discuss insurance - avoid answering questions about previous similar jobs
If something feels off, get another quote. In New Zealand, it is normal and sensible to speak to at least two or three tradespeople before you commit.
A simple checklist to use before you hire
Use this short list when speaking to each gasfitter:
- Are you licensed for this work? - Can you show your practising licence details? - Have you done this type of job before? - What exactly is included in the quote? - What extra costs could come up? - Do I need council consent or any other approval? - Are you insured, including public liability insurance? - How long will the job take, and when can you start? - What guarantee do you offer on workmanship? - Can you provide references or examples of similar work?
If you get clear, consistent answers in writing, you are much more likely to have a smooth job and fewer surprises.
Final thoughts
The right gasfitter should make you feel informed, not confused. The best tradespeople welcome questions because they know good preparation leads to safer work and better results. Take the time to check licensing, compare written quotes, and confirm exactly what is included before you sign off.
A little effort at the hiring stage can prevent expensive problems later — and for gas work, that is about more than value for money. It is about safety, compliance, and peace of mind.