Installing a new gas line in New Zealand can take anywhere from half a day to several days, depending on the scope of work, the type of gas supply, and whether a building consent is required. A straightforward connection to an existing gas supply might be completed in a few hours, while a full new reticulation system running through walls and floors could take two to three days or more.
What Affects Installation Time?
Several factors influence how long your gasfitter will need on site:
- Length and routing of the pipe run – A short run from an existing meter to a new cooktop is much quicker than running pipe from a new LPG cylinder through a subfloor, up through walls, and to multiple appliances.
- Type of gas supply – Natural gas (reticulated) and LPG (bottled) installations have different requirements. Connecting to a reticulated supply may involve coordination with your gas network operator, which can add time.
- Number of appliances – Each additional appliance (hob, oven, water heater, central heating, fireplace) adds to the complexity and time required.
- Access and building construction – Older homes with concrete floors or brick walls take longer to work through than modern timber-framed homes with accessible subfloors.
- Building consent – Some gas installations require a building consent from your local council before work can begin. Processing times vary by council and can add days or weeks to the overall project timeline. Always check with your council whether consent is needed.
- Inspection and testing – Once installed, the gasfitter must pressure-test and inspect the system before it can be commissioned. This is a legal requirement and is built into the job, but adds time.
Typical Timeframes as a Guide
| Job Type | Approximate Time |
|---|---|
| Single appliance connection (existing supply) | 1–3 hours |
| New LPG cylinder setup + 1–2 appliances | Half a day |
| New gas line through a home (2–4 appliances) | 1–2 days |
| Full reticulation for new build or major renovation | 2–4+ days |
These are rough guides only. Your gasfitter will give you a more accurate estimate after assessing your specific situation.
The Installation Process Step by Step
Understanding what's involved helps explain why the job takes as long as it does:
- Site assessment – The gasfitter inspects the property, plans the pipe route, and confirms the gas supply capacity.
- Consent (if required) – A building consent application is lodged with the council if the work triggers this requirement under the Building Act.
- Pipe installation – Copper or steel pipe (or approved flexible connections) is run through the building. This is often the most time-consuming stage.
- Appliance connection – Each appliance is connected and checked for correct gas type and pressure settings.
- Pressure testing – The entire system is pressure-tested to confirm there are no leaks.
- Commissioning and certification – The gasfitter certifies the work and issues a Certificate of Compliance (CoC), which is a legal requirement in New Zealand.
What Is Restricted Work — and Why It Matters
In New Zealand, all gas fitting work is restricted work under the Gas Act 1992. This means it must be carried out by a licensed gasfitter registered with the Plumbers, Gasfitters and Drainlayers Board (PGDB). It is illegal for homeowners or unlicensed tradespeople to install, alter, or repair gas pipework or appliances.
This isn't just a legal technicality — gas leaks can cause fires, explosions, and carbon monoxide poisoning. Always ask your gasfitter to show their current licence and provide a Certificate of Compliance on completion.
Safety note: If you ever smell gas, leave the building immediately, avoid using any switches or flames, and call your gas supplier or 111. Do not attempt to locate or fix a leak yourself.
Building Consent — Do You Need One?
Not all gas line installations require a building consent, but many do — particularly when work involves new pipework within the building structure or connections to fixed appliances like gas fires or central heating systems. Schedule 1 of the Building Act lists some exemptions, but the rules can be complex. Always confirm with your local council before work starts. Your gasfitter will often be familiar with local requirements and can advise you.
For more guidance on the Building Code requirements relevant to gas installations (particularly clauses G10 and G11 relating to piped gas), visit MBIE Building Performance.
When to Call a Professional
Because all gas work is restricted, the answer here is simple: always call a licensed gasfitter for any installation, alteration, or repair of gas lines or appliances. There are no DIY exceptions for gas work in New Zealand.
When choosing a gasfitter, look for someone who:
- Holds a current PGDB licence (you can verify this on the PGDB website)
- Provides a written quote and timeline upfront
- Issues a Certificate of Compliance on completion
- Has experience with your type of gas supply (LPG or natural gas)
You can find qualified, local gasfitters on tradedirectory.co.nz.
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