A practical guide to gasfitting timeframes in New Zealand
If you’re planning a gasfitting job, one of the first questions is usually: how long will it take? The honest answer is that it depends on the type of work, the condition of the existing installation, whether parts are on hand, and whether the job involves more than gasfitting alone.
For many straightforward jobs, a registered gasfitter can be in and out within a few hours. Larger installations, fault-finding, or work that needs to be coordinated with plumbers, electricians, builders, or your local council can take a day or more — sometimes several visits.
In New Zealand, gasfitting is restricted work and must be done by a person who is licensed under the Plumbers, Gasfitters and Drainlayers Board (PGDB). That matters for timing because the job often includes safety checks, pressure testing, commissioning, and compliance paperwork, not just the physical installation.
Typical timeframes for common gasfitting jobs
The table below gives broad time estimates for common residential jobs. These are general guides only; older homes, tight access, or hidden issues can add time.
| Job | Typical time on site | What can make it longer | |---|---:|---| | Gas hob replacement | 1–3 hours | Cabinet adjustments, isolation valve issues, hose/regulator changes, hard-to-access pipework | | Gas hot water cylinder replacement | 3–6 hours | Flue changes, drainage, water pressure issues, permits/consent-related coordination, old valves/fittings | | Gas infinity / continuous flow water heater replacement | 4–8 hours | Venting/flue work, electrical connection, pipe upsizing, wall mounting, commissioning | | New gas hob installation | 2–5 hours | New pipe run, cut-out changes, extra valves, bench modification by another trade | | LPG bottle installation or relocation | 2–4 hours | Cylinder platform/fencing requirements, longer pipe runs, regulator changes, weather exposure | | Gas fire installation | 1–2 days | Flue installation, framing or hearth preparation, electrical work, council consent/building issues | | Space heater or wall heater install | 1 day or more | Flueing, penetration through wall/roof, condensate drainage, electrician coordination | | Leak investigation and repair | 1–4 hours | Hard-to-find leaks, buried pipework, appliance fault diagnosis, need for parts | | Full gas fitting for a kitchen or new build | 1–3 days | Site readiness, other trades, inspection timing, multiple appliances, pressure testing | | Gas appliance service / safety check | 30 minutes–2 hours per appliance | Poor access, cleaning, replacement parts, issues found during inspection |
What usually happens during a gasfitting job
A gasfitter’s time on site is not just installation time. A proper job usually includes several steps:
- **Assessing the existing setup**: checking pipework, appliance location, ventilation, flues, isolation valves, and whether the current system is suitable. - **Isolating and making safe**: shutting off gas and confirming the area is safe to work in. - **Removing or adjusting old fittings**: this can take longer than expected if the original installation is old, corroded, poorly supported, or non-standard. - **Installing new components**: pipe runs, valves, regulators, appliance connection, flues, or cylinders. - **Pressure testing and leak checking**: essential for safety and compliance. - **Commissioning the appliance**: setting up operation, checking performance, and making sure the appliance works correctly. - **Paperwork and certification**: gasfitting work generally requires the correct certification or record-keeping under NZ rules.
That final stage is important. A fast job that skips testing is not a good job. Good gasfitting work includes verification that the system is safe and compliant.
The biggest factors that affect how long gasfitting takes
Several common issues can turn a half-day job into a longer one.
1. The age and condition of the existing installation Older NZ homes can have pipework, fittings, or appliance connections that no longer match current expectations. A gasfitter may discover:
- corroded or damaged pipework - incorrectly sized pipe runs - worn isolation valves or regulators - outdated appliance connections - poor clearances or ventilation - previous DIY or unlicensed modifications
If the existing setup needs rework, the job will take longer — and may need extra parts.
2. Whether the job is a simple replacement or a new install Replacing a like-for-like appliance is usually much faster than installing a new one in a different location. New installations can involve:
- running new pipework through walls, ceilings, floors, or underfloor spaces - coordinating with a builder for framing or penetrations - electrical work for ignition, controls, or power supply - flue installation through a wall or roof - appliance-specific clearances and manufacturer requirements
3. Access to the work area Time adds up quickly when the gasfitter has to work in cramped or hard-to-reach places such as:
- underfloor spaces - tight cupboards - behind fixed cabinetry - roof spaces - outside walls exposed to weather - homes with limited off-street parking or difficult site access
Good access and a clear workspace can save a lot of time.
4. Parts, fittings, and appliance availability Some jobs can only be completed once the right parts arrive. Delays often happen when:
- a specific regulator, flue kit, or valve is not stocked locally - the appliance model is out of stock - a replacement part has to be ordered from Auckland, Christchurch, or offshore - the gasfitter discovers an unexpected fitting size or compatibility issue
In the current NZ market, lead times for some appliances and parts can be variable, especially in busy periods.
5. Coordination with other trades Gasfitting is often only one part of a larger job. For example:
- a **builder** may need to complete framing or a hearth before the gasfire goes in - an **electrician** may need to provide power for ignition or controls - a **plumber** may need to complete associated water work - your **council** may need to process a consent if the installation forms part of building work that requires one
If the sequencing is wrong, the gasfitter may need to return more than once.
6. Weather and season Some gasfitting work is outdoors or partly exposed to the elements. In winter, delays can come from:
- wet conditions affecting outdoor work or roof access - higher demand for repairs and heater replacements - longer wait times for urgent bookings
Summer can also be busy, especially for kitchen upgrades, renovations, and pre-winter servicing jobs. If you want a heater installed before winter, book early.
Which jobs need extra planning or approvals?
Not every gasfitting job needs council approval, but some do. In New Zealand, building work may need a **building consent** from your local council, depending on the scope and whether it is exempt work. Gasfitting itself is regulated separately, but it can be part of a larger project that triggers consent or other approvals.
Examples where extra planning may be needed:
- installing a **gasfire** or wall-mounted heater that requires flues, penetrations, or building alterations - changing a kitchen layout where cabinetry, ventilation, or structural work is involved - adding new pipework through walls, floors, or ceilings as part of a renovation - installing LPG cylinders where placement, restraint, or enclosure needs to meet site and safety requirements
If you’re unsure, ask the gasfitter early whether the job is likely to involve council consent, a building consent exemption, or input from another trade. Good tradespeople can flag this before work starts, even if they cannot give legal advice.
How to plan your day around gasfitting work
Most homeowners want to know whether they need to stay home all day. For many jobs, the answer is yes — at least for the start and finish.
Practical planning tips
- **Clear the work area first**: remove access barriers from cupboards, under sinks, around appliances, and outdoor areas. - **Make sure someone is available**: the gasfitter may need you to approve changes, locate shut-off valves, or sign off on work. - **Ask about shutdown time**: if the gas supply needs to be isolated, plan for cooking, heating, or hot water interruptions. - **Keep pets and children away**: the job can involve tools, open access panels, and testing. - **Check parking and access**: easy vehicle access can speed up the job. - **Arrange other trades in the right order**: don’t schedule final kitchen joinery or painting before the gas work is confirmed. - **Build in a buffer**: if the job is expected to take half a day, allow the whole day in case of complications.
If you’re replacing a critical appliance such as a hot water unit in winter, ask the gasfitter whether a temporary workaround is possible while the work is underway.
How to reduce delays before the gasfitter arrives
Homeowners can help the job run smoothly by providing clear information upfront.
When requesting quotes, include:
- photos of the existing appliance and pipework - the make and model of the new appliance, if already chosen - the age of the current installation - whether there is LPG or natural gas - any known issues such as low pressure, leaks, or flame problems - whether the job is part of a renovation or new build - access details such as stairs, underfloor access, or narrow driveways
It also helps to ask whether the quote includes:
- site visit time - removal and disposal of the old appliance - certification and compliance paperwork - any travel charges - allowance for unexpected extras
Getting multiple written quotes is sensible, especially for bigger jobs. A quote that looks cheaper may not include the same scope of labour, materials, or compliance work.
When a gasfitting job takes longer than expected
Sometimes delays are unavoidable. The most common causes are:
- finding unsafe or non-compliant existing work - needing a part that is not immediately available - discovering the appliance itself is faulty or incompatible - needing to return after another trade finishes related work - weather stopping outdoor or roof access - waiting for council or inspection-related timing on a larger project
If this happens, ask the gasfitter what is holding up completion and whether the job can be split into stages. Clear communication is far better than rushing to finish a potentially unsafe installation.
What to ask before you book
Before hiring a gasfitter, ask:
- Are you registered and licensed for gasfitting in New Zealand? - Have you done this type of job before? - What is included in the quote? - How long will you be on site? - Will I need another trade as well? - Could this job need a building consent or council involvement? - What paperwork or certification will I receive afterwards?
You can also check whether the business or person is appropriately licensed through the PGDB register. For related work, remember that plumbing, gasfitting, and drainlaying are all restricted trades, while electrical work must be done by someone authorised under the Electrical Workers Registration Board (EWRB).
Bottom line
For many routine gasfitting jobs in New Zealand, expect a few hours on site. A simple hob replacement might be done before lunch, while a hot water cylinder, gasfire, or new installation can take most of a day or longer. The main variables are access, the condition of existing pipework, appliance compatibility, weather, parts availability, and whether other trades or council approvals are needed.
The best way to avoid surprises is to book early, provide good photos and details, and get a written quote that clearly states what is included. That gives you a better idea of time, cost, and any extra steps before the work starts.