Short answer: yes, in most cases
If you’re working on gas appliances or gas pipework in New Zealand, the safe assumption is that you need a **licensed gasfitter**. Gasfitting is restricted work under the **Plumbers, Gasfitters, and Drainlayers Act 2006**, and the people doing it must hold the right licence and usually issue a **Certificate of Compliance (CoC)** when the job is completed.
That doesn’t mean every task around a gas appliance is off-limits to homeowners. You can usually do some basic, non-gas work yourself — for example cleaning around an appliance or arranging access. But as soon as the work involves **installing, modifying, reconnecting, testing, commissioning, or repairing gas systems**, it generally needs a licensed professional.
For homeowners, the practical rule is simple: if the job affects the gas supply, fittings, flueing, burner, appliance connection, pressure, or safety settings, call a licensed gasfitter.
What work usually requires a licensed gasfitter
In New Zealand, gas work is tightly controlled because mistakes can lead to fire, explosion, carbon monoxide exposure, or gas leaks that are not obvious until something goes wrong.
Examples of work that generally must be done by a licensed gasfitter include:
- Installing a gas hot water system, cooktop, oven, fireplace, or space heater - Connecting an appliance to the gas supply - Extending, altering, or repairing gas pipework - Converting an appliance from bottled gas (LPG) to natural gas, or vice versa, where conversion is permitted by the manufacturer - Replacing gas valves, regulators, burners, injectors, or safety controls - Testing gas tightness and commissioning a new or altered gas installation - Installing or modifying flues and ventilation that are part of the gas appliance installation - Decommissioning or capping off gas lines in a compliant way
If the work is part of a wider renovation — for example a kitchen upgrade, bathroom renovation, or replacing a fireplace before winter — the gas component still needs a licensed gasfitter even if other parts of the project are handled by a builder or DIY homeowner.
What you can usually do yourself
There is a lot of confusion around gas work because some tasks look simple. But in New Zealand, the legal line is usually drawn at **gasfitting** rather than at general handyman work.
DIY tasks that are usually fine because they don’t involve gasfitting itself include:
- Painting or decorating around an appliance - Cleaning filters, grilles, or accessible surfaces as per the manufacturer’s instructions - Replacing batteries in electronic ignition systems, if specified by the manufacturer - Clearing the area around gas appliances for ventilation and access - Turning off a manual gas shut-off valve in an emergency, if you know how to do so safely - Arranging and paying for a licensed gasfitter to carry out the regulated work
But if you are unsure whether a task counts as gasfitting, don’t guess. A lot of “minor” jobs still require a licence because they can change the operation or safety of the system.
A useful rule of thumb
If a job requires you to:
- disconnect a gas appliance, - open a gas pipe, - alter a gas line, - adjust gas pressure, - test for leaks, or - recommission an appliance,
it is almost certainly licensed work.
Licence, CoC, and compliance: what homeowners should expect
A licensed gasfitter is not just someone who knows the trade. They are registered and authorised to do regulated work under the New Zealand system, and they should be able to show their licence details if asked.
For homeowners, the key paperwork is usually:
- **Certificate of Compliance (CoC):** confirms the gasfitting work complies with legal and safety requirements. - **Gas Safety Certificate** or similar manufacturer/service documentation: may be used for servicing or appliance-specific checks. - **Records for council or property files:** important when you sell, renovate, or insure the property.
Depending on the job, there may also be implications under the **Building Act 2004** or local council requirements. For example, a new gas fireplace installation or a change that affects a flue, ventilation, or enclosure may trigger building consent or require proof that the work was done by a suitably qualified tradesperson. It’s not always the gasfitting itself that needs the consent — but the wider building work may.
If you’re doing a renovation, ask the gasfitter early whether the job is likely to involve:
- a building consent, - a manufacturer’s installation requirement, - access through walls, floors, or roofs, - or coordination with an electrician, builder, or plumber.
The risks of unlicensed gas work
Trying to save money on gas work can be a false economy. The upfront labour cost might look lower, but unlicensed work can create costs that are far bigger than the original quote.
Safety risks
Gas is unforgiving. Poor workmanship can cause:
- gas leaks, - fire or explosion, - carbon monoxide poisoning, - incomplete combustion, - appliance failure in winter when demand is highest.
Some issues are not obvious. A gas appliance can appear to work but still be operating unsafely, especially if flueing or ventilation is wrong.
Insurance risks
If a loss occurs and the insurer finds the work was not carried out by a properly licensed person, or the installation was not compliant, you may face a declined or reduced claim. Policies vary, but insurers commonly expect work on regulated systems to be done legally and to standard.
That matters not only for a major incident, but also for gradual problems such as damage caused by a slow leak, fire damage from faulty installation, or contamination from carbon monoxide.
Resale and disclosure risks
When you sell a home, buyers and their lawyers often ask for evidence of compliant work, especially for anything involving heating, hot water, or kitchen appliances. Missing paperwork can slow a sale or lead to price negotiations.
A property with undocumented gas work can raise questions such as:
- Was the appliance installed by a licensed gasfitter? - Is there a CoC? - Has the installation been altered since the last service? - Does the gas system match the current appliance and ventilation requirements?
Even if the work is technically fine, the lack of proper records can reduce buyer confidence.
Compliance and legal risk
Gasfitting without the correct licence can breach New Zealand law. If something goes wrong, there can be regulatory consequences as well as repair costs. In some cases, a gasfitter may refuse to sign off or connect work that they didn’t do themselves and cannot verify.
How much does a licensed gasfitter cost in New Zealand?
Costs vary by region, urgency, access, and the type of appliance. In many parts of New Zealand, especially during the colder months, demand for heating and hot water work rises, which can affect wait times and pricing.
Typical pricing can include:
| Job type | Usual cost range | |---|---:| | Call-out / minimum labour charge | $100–$180 | | Servicing a gas appliance | $120–$300+ | | Connecting or replacing a cooktop | $150–$400+ | | Gas fireplace installation | $500–$2,000+ | | More complex pipework or conversions | $300–$1,500+ |
These are broad guide ranges only. Materials, access, certificate fees, travel, and after-hours work can add to the total. Always ask whether the quote includes testing, certification, and any required follow-up visit.
How to hire the right gasfitter
When you need gas work done, don’t choose on price alone. Ask for written quotes and compare what is actually included.
Before you book, check:
- **Licence status:** confirm the gasfitter is licensed for the work being done - **Experience with your appliance or fuel type:** LPG, natural gas, or a specific brand/model - **What paperwork will be provided:** CoC, service record, or compliance documents - **Whether the quote includes testing and commissioning:** this should normally be part of a proper job - **Whether any other trades are needed:** builder, electrician, roofer, or plumber - **Start and finish times:** especially important if you’ll be without hot water or heating
It’s smart to get **at least two or three written quotes** for non-emergency work. A good quote should identify labour, materials, testing, and certification separately or clearly enough that you know what you’re paying for.
Special cases to watch for
Gas hot water systems
These are common in NZ homes, particularly where continuous-flow systems were installed for energy efficiency or space-saving. Replacements and relocations usually need licensed gasfitting, and if plumbing changes are involved, that work also needs the right licensed tradesperson.
Gas fireplaces and space heaters
These often involve flues, clearances, ventilation, and sometimes structural work. A fireplace may look like a simple appliance swap, but the installation can be much more involved than people expect.
LPG bottle changes and caravan-style setups
Portable bottle systems are not an open door to DIY. Connections, regulators, hose assembly, and fixed pipework still need proper compliance. If in doubt, get a gasfitter to inspect it before use.
Renovations and older homes
Older NZ homes may have legacy gas installations, previous conversions, or non-standard pipework. Don’t assume an older system is safe just because it has been there for years. Older properties are more likely to need upgrades, testing, or a full replacement rather than a simple repair.
Bottom line
If the job involves gas pipework, appliance connection, adjustment, testing, or commissioning, you generally need a **licensed gasfitter** in New Zealand. DIY is usually limited to non-gas tasks around the appliance, not the gas installation itself.
The safest approach is to verify the tradesperson’s licence, get a written quote, and make sure you receive the right compliance paperwork when the work is done. That protects your household, your insurance position, and your home’s resale value.
If you’re planning gas work, treat it like any other regulated trade: hire properly, document everything, and don’t take shortcuts with safety.