What gas compliance work costs when done properly, Queensland, as of 2026:
| Situation | Canonical range |
|---|---|
| Gas cooktop like-for-like swap, certified | $260 to $480 plus compliance |
| New gas point, installed and certified | $350 to $900 plus compliance |
| Retrospective inspection and certification of past gas work | Quoted on inspection |
| Annual gas appliance service | Quoted on inspection |
The short answer is yes, always. Queensland's Petroleum and Gas (Production and Safety) Regulation requires every gas installation, modification, repair or disconnection to be carried out by a licensed gas fitter who must issue a gas compliance certificate at completion. This applies to the smallest like-for-like swap just as much as to a major new install.
What the compliance certificate proves
The certificate proves the work was done by a licensed gas fitter, complies with AS5601, was leak-tested with a manometer, and is registered with the Petroleum and Gas Inspectorate.
- The work was carried out by a licensed gas fitter (the licence number is on the certificate)
- The installation complies with AS5601 (gas installations) and other relevant Australian Standards
- The gas line was leak-tested with a manometer
- The appliance was commissioned properly
- The certificate has been registered with the Petroleum and Gas Inspectorate (which we do automatically)
Why like-for-like still needs the certificate
A like-for-like swap still needs the certificate because every disconnection and reconnection can introduce a leak: a fitting not tightened, a regulator damaged, a line not pressure-tested. Gas leaks kill people. The certificate process is designed to make sure every gas job, no matter how minor, has been done properly by someone trained to do it.
What happens if I do not have a compliance certificate?
- Insurance claim risk. Most household insurance policies require gas appliances to have been installed by a licensed gas fitter with proper compliance certification. If your house has a gas-related incident (fire, explosion, carbon monoxide poisoning) and the original install was unlicensed, the insurer can deny the claim.
- Legal liability. If someone is injured or killed as a result of an unlicensed gas install at your property, you as the homeowner can face civil or criminal liability.
- Sale of the house. Pre-sale plumbing and gas inspections will identify uncertified work. Buyers can negotiate down the sale price or pull out of contracts.
- Regulatory enforcement. Queensland's Petroleum and Gas Inspectorate has prosecution powers for unlicensed gas work.
Who is allowed to do gas work in Queensland?
Only someone holding both a current QBCC plumbing licence and a Queensland gas work authorisation can lawfully do gas work for hire in Queensland. This is a higher bar than just being a licensed plumber, gas work requires additional certification on top of the standard plumbing licence.
Unlicensed parties who sometimes attempt gas work include, handymen, kitchen installers, builders who think they can DIY, and unqualified mates. None of these are legal in Queensland for gas work.
What about a kitchen installer who says they will connect the cooktop?
Unless the kitchen installer personally holds a gas work authorisation, they cannot legally connect your cooktop; a licensed gas fitter must do the connection. The legitimate flow is, the kitchen installer fits the cabinetry and prepares the cut-out, then we (or another licensed gas fitter) attend to do the gas connection and compliance.
Can a licensed plumber do gas work without separate gas certification?
No: the plumbing licence and the gas work authorisation are separate credentials, and holding one does not grant the other. Many plumbers are licensed for both, but not all are. We hold both. Always confirm with anyone you engage that they specifically have gas work authorisation in addition to a plumbing licence.
What is on the compliance certificate?
- Address where the work was performed
- Description of the work (cooktop swap, HWU install, etc)
- Appliance brand, model and serial number
- Date of completion
- Licensed gas fitter's name and licence number
- Statement that the work complies with AS5601 and other relevant standards
- Pressure test result (leak-tested with manometer)
- Gas fitter's signature
How do I keep the certificate safe?
File the paper copy with your household documents and scan a PDF; the Petroleum and Gas Inspectorate also keeps a digital record automatically. You may need it for insurance claims, sale of the house, or future plumbing work. The Petroleum and Gas Inspectorate also keeps a digital record automatically, so the certificate is not technically irreplaceable, but having your own copy is faster than requesting from the regulator.
What we provide on every gas job
Every gas job we complete includes the compliance certificate on the spot, a digital copy by email, and lodgement with the Inspectorate at no extra charge.
The QBCC public register and how to actually verify your gas fitter
Verifying a gas fitter takes about 60 seconds on qbcc.qld.gov.au: check the plumbing licence, the gas work authorisation, expiry dates and any disciplinary history. The Queensland Building and Construction Commission (QBCC) runs a public licence register at qbcc.qld.gov.au. Search the contractor name or licence number and you will see the current licence status, the licence class (you want to see Plumbing - Drainage and Gas Fitting), any expiry date, and any disciplinary history. Separately, gas work in Queensland requires gas work authorisation, which the QBCC register also displays. Look for both, plumbing licence and gas work authorisation, current and not expired. Any operator who refuses to provide their licence number or whose number does not match the register is not someone you should let near your gas appliances. We list our QBCC and gas work authorisation numbers on our website, on every quote and on every compliance certificate. Easy to verify before you sign anything.
What the Petroleum and Gas Inspectorate actually does with your certificate
The Inspectorate holds every lodged certificate in a centralised database, which is what insurers, buyers and investigators check when something goes wrong. The gas fitter lodges it with the Petroleum and Gas Inspectorate (a unit within the Queensland Department of Energy and Public Works), which maintains a centralised database of every gas installation in the state. The Inspectorate runs random audits, gas fitters who consistently produce non-compliant work get investigated and can lose their authorisation. The audit catches things like fittings not tightened to spec, missing isolation valves, inadequate ventilation provision, undersized gas lines for stated appliance load, missing or wrong-spec regulators. As a homeowner you can also request a copy of your property's gas compliance history from the Inspectorate if you have lost certificates, useful when selling a house and the buyer is doing due diligence. The system works because the certificates are auditable, gas fitters know their work could be inspected, and the penalty for falsification is loss of licence. None of this protection exists for unlicensed installs, which is one of the reasons unlicensed work is so risky.
How gas insurance claims actually get denied
The denied claims follow one pattern: something goes wrong with a gas installation, the insurer asks for the compliance certificate, and there is not one to produce; the paperwork, not the workmanship, decides the claim. Uncertified gas work can void an insurance claim entirely, regardless of how tidy the install looks, because most household policies require gas appliances to be connected by a licensed gas fitter with proper certification. The same gap surfaces at sale time, when a pre-purchase inspection identifies appliances without certificates and the buyer negotiates the price down or walks away. The fix in either case is rectification and retrospective certification by a licensed gas fitter, which typically runs $400 to $1,500 per appliance as of 2026. These are not edge cases, they are the routine outcomes of skipping the compliance step. The $260 to $820 you save by getting an unlicensed mate to do the install is not worth the downside risk.
The handyman trap and the kitchen installer trap
General handymen and kitchen companies usually hold neither the plumbing licence nor the gas authorisation, so the correct flow is separate qualified trades for cabinetry, gas and plumbing. The handyman trap, a general handyman quotes for a renovation that includes gas appliance reconnection and offers to do the whole job at one price. The handyman is not gas-licensed, the gas work is illegal, and the homeowner often does not realise they did not get a compliance certificate until they try to sell the house. The kitchen installer trap, the kitchen company that quoted your new kitchen offers to handle everything including connecting the new gas cooktop. The kitchen installer is qualified for cabinetry but almost never holds a gas work authorisation, the connection is illegal. The correct flow is, kitchen installer fits cabinetry and prepares the cut-out, gas fitter (us, or another licensed operator) attends separately to connect gas and issue compliance, plumber connects any sink and water lines. Three different trades, three different licences, three different compliance trails. Beware of any single operator claiming to handle everything unless they hold all three licences.
What is actually leak-tested and how the manometer test works
The manometer test pressurises the line to 5 kPa (1.4 kPa for very low pressure systems) and requires the pressure to hold within 0.1 kPa over 5 minutes. The procedure for a residential gas installation is, isolate the appliance, pressurise the gas line section to standard test pressure (5 kPa for low-pressure domestic, 1.4 kPa for very low pressure systems), close the test valve, and observe the manometer for the prescribed period (typically 5 minutes). The pressure must hold steady within 0.1 kPa tolerance over the test period. Any drop indicates a leak somewhere in the tested section, which we then locate using soap solution or electronic gas detector before re-testing. Only when the pressure holds steady can the certificate be issued. The manometer test is non-negotiable on every gas job, even a like-for-like cooktop swap. The whole test takes 10-15 minutes and is documented on the compliance certificate. If your gas fitter does not have a manometer visible during the job, they are not running the test correctly, and the certificate they issue is not based on actual leak verification.
Selling a house and the gas compliance audit that buyers now do
Buyers' inspections now routinely check gas compliance, and missing certificates typically cost vendors $400 to $1,500 per appliance in retrospective certification, as of 2026, before any negotiated reduction is counted. The inspection looks at every gas appliance on the property, asks for the compliance certificate for each, and notes any missing certificates in the building inspection report. Buyers then either negotiate the sale price down to cover the cost of retrospective inspection and rectification (typically $400 to $1,500 per appliance, sometimes more if rectification work is needed) or pull out of the contract if multiple issues are found. Vendors who can produce a complete gas compliance file for the property have a measurable selling advantage. We are increasingly called by Gold Coast vendors a few weeks before listing to do a gas safety inspection and produce current certificates for any historical work that lacks them. The pre-listing inspection costs $240-380 and removes a buyer negotiation point before it can cost you at the contract table. Worth thinking about if you are within 6-12 months of selling.
Sources: Petroleum and Gas (Production and Safety) Regulation (Qld); AS5601 gas installations; QBCC licensee register, qbcc.qld.gov.au.