Gas is the one trade where "my mate can do it" is illegal.
Gasfitting is restricted work in New Zealand: only gasfitters registered and licensed with the PGDB can do it or supervise it, and the certification paperwork is part of the job, not a favour. Nobody in Christchurch publishes gas rates, so you are comparing scope and credentials, not price lists. The register at pgdb.co.nz is your first check, before any quote.
Is this your stream?
Gas hobs and ovens, gas hot water (continuous flow or storage), gas fires, new gas connections, pipework alterations, and gas leak repairs. All of it needs a registered gasfitter, all of it is quoted.
That is not a quote request, it is an evacuation. Out of the building, no switches, call 111 or your gas supplier's emergency line from outside. The gasfitter visit is step two, and Walton runs a 24/7 gas line for it.
What it costs in Christchurch
Why nothing is published
Gas work varies too much by appliance, flue route and pipe run for honest flat rates, so Christchurch gasfitters quote per job. Context from Flow Pro's 2025 data: Christchurch trade rates sit at $100–$140 per hour plus callout, and gasfitting sits at the qualified end.
Gas continuous flow hot water
NZ cost guides put an installed gas continuous flow hot water system around $2,500–$3,500 including materials and labour, with homes needing upgraded gas supply lines paying more. Clyne & Bennie supplies and installs Rinnai and Bosch units directly.
The certification
Completed gasfitting should come with a Gas Certificate. It is the proof the work was done by someone registered, and it is the document your insurer and the next buyer will ask for. Confirm it is included before the work starts.
Christchurch providers, compared
Six providers with registered gasfitters across Christchurch, grouped by what they are best at. Hover a row for the detail that matters.
Common mistakes
Letting anyone but a registered gasfitter touch gas: gasfitting is restricted work in NZ and must be done or supervised by someone registered and licensed with the Plumbers, Gasfitters and Drainlayers Board. Check the public register at pgdb.co.nz, even for a simple hob swap.
Not asking for the certification: completed gasfitting should come with a Gas Certificate and, where applicable, be entered on the Gas Supplier Declaration of Conformity. If the installer goes quiet when you ask about paperwork, that is your answer.
Smelling gas and calling a plumber first: leave the building, do not touch switches or flames, and call 111 or your gas supplier's emergency line from outside. The gasfitter's visit comes after the immediate risk is cleared.
Assuming LPG and natural gas are interchangeable: Christchurch homes run on reticulated natural gas in some suburbs and bottled LPG elsewhere, and appliances must match the supply. Converting between them is gasfitter work, not a DIY jet swap.
Skipping ventilation on indoor gas appliances: unflued gas heaters add moisture and combustion products to the room, which matters in Canterbury winters when houses are shut tight. A registered gasfitter will specify flued options; a handyman will not.
Treating the cheapest quote as the same job: none of Christchurch's gasfitters publish rates, so compare scope instead. Ask each quote to specify the appliance model, flue work, certification and commissioning, because that is where the differences hide.
FAQ
How much does gasfitting cost in Christchurch?
No Christchurch gasfitter we found publishes rates, so everything is quoted per job. As context, Flow Pro's 2025 data puts Christchurch plumbing rates at $100–$140 per hour plus a $60–$90 callout, and gasfitting typically sits at the qualified end of that scale. Ask for a fixed quote on defined work like a hob swap or a gas fire install rather than open-ended hourly billing.
Who is legally allowed to do gas work in NZ?
Only gasfitters registered and licensed with the Plumbers, Gasfitters and Drainlayers Board can carry out or supervise gasfitting. It is restricted work, the same legal category as sanitary plumbing and drainlaying. Search the public register at pgdb.co.nz before you book, and ask what certification you will receive on completion.
What should I do if I smell gas?
Get everyone out, do not touch light switches, appliances or anything electrical, and do not use your phone inside. From outside, call 111 if the smell is strong or you cannot isolate the supply, or your gas retailer's emergency line. A gasfitter visit is the step after the immediate risk is cleared, and firms like Walton run a 24/7 gas line for the repair itself.
Is gas hot water worth it in Christchurch?
It depends on your supply. Continuous flow gas hot water suits households with reticulated natural gas and high hot water demand; NZ guides put installed gas continuous flow systems around $2,500–$3,500. On bottled LPG the running costs look different, so ask the gasfitter to price both the install and the expected running cost for your household size.
Do I need a consent for gas work?
Routine gasfitting like appliance replacement does not normally need a building consent, but it does need a registered gasfitter and the right certification. New installations, flues through roofs, and work tied to a wider renovation can change that, so ask your gasfitter to confirm the consent position in writing before work starts.
Everything is quoted and everyone must be on the PGDB register, so compare scope and credentials rather than price lists. Foleys, Clyne & Bennie and Walton bring the biggest multi-trade benches with 24/7 lines; Clyne & Bennie also supplies the appliances; Laser Christchurch East covers the east with franchise paperwork; PlumbFitz and ACF suit smaller planned jobs. Smell gas: out first, phone second, gasfitter third.