Gas Pipe Types and Material Costs
The pipe material your gas fitter uses depends on whether the run is internal, external, or underground. Each type has different cost, durability, and code requirements.
A good gas fitter will recommend the right material for each section of the run. CSST is increasingly popular for retrofit work because its flexibility allows routing through walls and cavities with fewer joints, reducing both installation time and potential leak points.
What Affects the Cost
Scope of work: Connecting an existing gas point to an appliance is the simplest job ($150–$400 for a cooktop or BBQ connection). Running new pipe from the meter to a new location costs significantly more.
Pipe run length: Every additional metre of pipe adds material and labour cost. A 5-metre internal run is straightforward. A 15–20 metre run through walls and across a property changes the scope entirely.
Gas type: Natural gas operates at 1.13 kPa (residential) while LPG operates at 2.75 kPa, requiring different regulators, orifices, and test pressures. Converting appliances between gas types involves regulator changeover and jet replacement ($80–$150 per appliance for the conversion kit alone).
Access: Concrete cutting, sub-floor crawling, or roof-space routing all add time and cost. External wall-mounted runs are simplest. Concealed internal runs through brick or stone walls are the most labour-intensive.
Flexible connector replacement: These have a manufacturer-rated 5-year lifespan (date-stamped on the connector). A responsible gas fitter will check all connectors on the property during any gas work and replace any that are overdue (~$30–$60 per connector, plus labour).
Leak investigation: Gas leak detection using electronic sniffers and pressure-drop testing is specialist work, typically at premium rates for emergency callouts.
New gas connection: If your property has no existing gas supply, connecting to the street main through your gas distributor (Jemena, AGN, ATCO, or APA Group depending on your state) is a separate cost. A basic residential connection is around $2,000–$3,500, but varies by distance from the main.
A straightforward appliance connection to an existing gas bayonet point, for example hooking up a freestanding cooktop in a home with gas already at the kitchen, sits toward $200. Running a new gas line from the meter to an outdoor BBQ area 15 metres away, through a brick wall, with trenching and multiple fittings, pushes toward $4,200. Most jobs fall around $800 for a short new pipe run or appliance connection with connector replacement.
Gas leaks require immediate action. If you smell gas, do not operate electrical switches or flames. Call your gas distributor's emergency line (1800 427 427 for most networks, or 131 909 for Jemena in NSW) to isolate the supply, then arrange a licensed gas fitter for repairs. After-hours, weekend, and emergency gas work carries premium rates compared to scheduled business-hours appointments. If the situation is not an active emergency, for example connecting a new cooktop or extending to an outdoor BBQ, scheduling during business hours saves money.
When You Need a Gas Fitter
Not every gas-related job is obvious. Here are the common scenarios where a licensed gas fitter is required by law:
New appliance connection: Cooktop, oven, gas heater, BBQ point, pool heater, or
gas hot water system. Even if a gas bayonet point already exists, connecting the appliance requires a licensed gas fitter.
Gas line extension: Running pipe to a new location (outdoor kitchen, alfresco area, granny flat) from the existing meter.
Flexible connector replacement: Every flexible gas hose connecting an appliance to the supply must be replaced when the date stamp shows it is 5 years old. A gas fitter should audit all connectors during any visit.
Gas leak investigation: Any suspected leak, whether you smell gas, hear hissing, or notice a dead patch in garden grass near a buried line.
Gas-to-electric changeover: Disconnecting and capping gas lines when switching to all-electric appliances (induction cooktop, heat pump hot water). For the replacement unit and plumbing installation,
hot water system replacement has a guide range of $1,500–$4,600 per job across system types, separate from gas disconnection. Gas abolishment (permanent meter removal) currently costs ~$1,400 but drops to ~$260 from July 2026 under an AER ruling that found previous charges were too high.
Compliance upgrades: Bringing old gas installations up to current AS/NZS 5601.1:2022 standards, including replacing galvanised steel pipework, non-compliant joints, or missing isolation valves.
City and Regional Price Comparison
Prices vary across Australia at two levels.
City-level: Sydney (NSW) serves as the baseline at $200–$4,200 per job. Melbourne, with its extensive natural gas network (supplied by AGN and Multinet Gas) and high gas appliance penetration, has competitive pricing and a large pool of licensed gas fitters. Brisbane tends to cost more per job due to limited natural gas coverage, with LPG work common in outer suburbs. Smaller trade pools and logistics costs influence gas fitting quotes in Perth and Adelaide; see the Pricing by City table for local ranges.
Suburb and regional level: Within any city, the spread between $200 and $4,200 depends on existing gas infrastructure, property construction, and access. Inner-city terrace houses (Balmain in Sydney, Fitzroy in Melbourne) with narrow side passages and shared walls make pipe routing significantly more labour-intensive than standard suburban homes. Properties without existing gas reticulation, common in newer estates built as all-electric (Tarneit in Melbourne, Alkimos in Perth), face the additional cost of a gas main connection from the distributor before any internal gas fitting work can begin. Older suburbs with original galvanised iron gas pipework may need section replacements to bring the system up to current standards, adding to the total regardless of city.
The gas-to-electric transition is also reshaping the market. Victoria has banned gas connections in new homes from January 2024, and from March 2027, gas hot water systems in existing Victorian homes must be replaced with electric alternatives at end-of-life. This means gas fitting work in Melbourne increasingly involves disconnection and capping rather than new installations. In other states, gas fitting remains steady, particularly for outdoor cooking and heating.
How We Calculate
Estimates are based on current trade rates for licensed gas fitters in each state, adjusted for regional labour costs and typical material prices. All figures include GST. Ranges reflect the spread between a straightforward appliance connection and a more involved new gas line installation. Compliance certificate costs are included in the quoted range.