Hiring a gasfitter is one of those jobs where a few careful questions can save you money, time, and safety headaches later. In New Zealand, gas work is tightly regulated for good reason, so you want someone who is competent, licensed where required, and clear about exactly what they’ll do before any tools come out.
Start with the basics: are they qualified for this job?
The first question should always be whether the gasfitter is licensed for the specific work you need done.
Ask these questions
• Are you a licensed gasfitter in New Zealand?
• What kind of gas work are you licensed to do?
• Have you done this exact type of job before, such as LPG appliance installation, gas hob fitting, hot water systems, or gas fireplace servicing?
A good answer sounds specific and confident. They should be able to explain their licence status, the type of work they regularly carry out, and any limits on what they can legally do. In New Zealand, gasfitting work should be done by a suitably licensed professional, and they should be comfortable explaining that without hedging.
If the answer is vague, or they say they can “sort it out” without checking the details, that is a red flag.
Ask what the job will involve from start to finish
Before you accept a quote, you should know exactly what the gasfitter plans to do and what is not included.
Ask these questions
• What is included in the quote?
• Do you need to inspect the site first?
• Will you supply the appliance, fittings, regulators, pipework, or only install customer-supplied parts?
• Will you test the installation and provide compliance paperwork if required?
A good gasfitter will explain the scope in plain language. For example, they might say they’ll inspect existing pipe sizing, check ventilation, connect the appliance, pressure test the system, and commission it safely.
That detail matters because gas jobs often uncover extra work once the old installation is opened up. If they discover undersized pipework, poor ventilation, corrosion, or an out-of-date appliance connection, you want to know whether that would affect the price and timeline.
Check how they price the work
Gasfitting costs can vary widely depending on the appliance, access, gas type, and whether the existing setup is suitable. Ask for a clear estimate rather than a casual verbal figure.
Ask these questions
• Is this a fixed price or an estimate?
• What could cause the price to change?
• Do you charge a call-out fee or inspection fee?
• Are materials, travel, and testing included?
Typical indicative price ranges in NZ might look like this:
• Basic gas appliance servicing: $150–$300
• Standard gas hob installation or replacement: $250–$700
• Gas hot water system installation: $1,500–$4,500+
• Gas fireplace installation: $1,500–$6,000+
• Fault finding or leak investigation: $120–$250+ for initial attendance, then more if repairs are needed
These are broad guides only. Costs can be higher in regional areas, for hard-to-access sites, or where gas supply upgrades are needed. A good gasfitter will tell you what is driving the cost rather than just giving a number.
Confirm safety, compliance, and paperwork
Gas work is not just about getting an appliance running. It also needs to be safe and compliant with New Zealand requirements.
Ask these questions
• Will you carry out pressure testing and leak testing?
• Will you provide a compliance certificate or record for the work, if applicable?
• Do you follow current New Zealand gas installation standards and manufacturer instructions?
• If the job is not compliant as-is, what do you recommend?
The right answer should show they prioritise safety over speed. They should be able to explain that testing is part of the job, and that they won’t simply connect an appliance and leave without checking for leaks, correct operation, and safe clearances.
If your job involves a change of appliance, a new installation, or alterations to pipework, ask what documentation you should receive and keep for your records. A careful gasfitter will not be annoyed by this question; they’ll expect it.
Ask about experience with your specific gas type and property
Not every gas job is the same. LPG, natural gas, older villas, new builds, apartments, rental properties, and rural homes can all present different challenges.
Ask these questions
• Do you work with LPG, natural gas, or both?
• Have you worked on homes like mine before?
• Are there any access, ventilation, or location issues you expect on this property?
• Do you have experience working with the appliance brand or model I have?
A strong answer will be practical, not overconfident. For example, if you live in a rural property with LPG bottles, they should talk about bottle placement, regulator access, line lengths, and weather exposure. If it is a townhouse or apartment, they should consider access, body corporate requirements, and shared services.
This is also a good moment to ask whether they foresee any upgrade work, such as improved ventilation, new isolation valves, or pipe changes. That can affect both price and timing.
Ask how long it will take and how they handle problems
Even a straightforward gas job can take longer if parts are missing or existing pipework is not suitable. You want someone who gives realistic timeframes and communicates well if plans change.
Ask these questions
• When can you start?
• How long do you expect the job to take?
• What happens if you find a safety issue or hidden fault?
• Will you contact me before doing any extra work?
Good answers are clear and cautious. A gasfitter should not promise a same-day fix if they haven’t seen the site. They should explain likely timelines, how they’ll handle unexpected issues, and whether they need to order parts.
For larger jobs, such as installing a new gas fireplace or converting a home to gas hot water, it is reasonable to ask for a staged timeline. That way you know when preparation, installation, and commissioning will happen.
Ask for references, reviews, and aftercare
A reputable gasfitter should be comfortable discussing their workmanship and what happens after the job is finished.
Ask these questions
• Can you provide references or point me to recent reviews?
• What warranty do you offer on workmanship?
• If there is a problem after installation, how do I get back in touch?
• Do you offer servicing or maintenance reminders for appliances?
A good answer does not have to be flashy. You are looking for consistency, professionalism, and a willingness to stand behind the work. They should also explain what is covered by the appliance manufacturer versus what is covered by their own workmanship.
For gas appliances, ongoing servicing matters. In New Zealand homes, regular maintenance can help keep burners efficient, detect wear early, and reduce the risk of unsafe operation.
What to watch out for before you say yes
Some warning signs are obvious, but they’re easy to ignore when you need the job done quickly.
• They won’t say whether they are licensed or qualified for the work
• They give a very low price without explaining what’s included
• They avoid mentioning testing or paperwork
• They seem reluctant to inspect the site before quoting on a complex job
• They pressure you to decide immediately
• They brush off your safety questions
A trustworthy gasfitter will welcome careful questions. They know that good communication now prevents disputes later.
If you are comparing multiple tradespeople, do not choose on price alone. In gasfitting, the cheapest quote is not always the best value if it leaves out testing, compliance work, or the right materials.
A simple checklist to use before booking
Before you confirm, make sure you can answer these questions with confidence:
• Are they licensed for the work?
• Have they done this type of job before?
• Is the quote clear about labour, materials, testing, and paperwork?
• Do they understand the gas type and property setup?
• Have they explained likely risks, extra costs, and timelines?
• Do they seem safety-focused and easy to communicate with?
If the answer to most of those is yes, you are probably dealing with a professional who takes the job seriously. That is exactly what you want when it comes to gas work.