A new gas cooktop looks simple enough sitting in its box, but the actual cost of getting it installed depends on far more than just the appliance itself. Whether you are doing a straightforward like-for-like swap or adding a gas point during a kitchen renovation, a licensed Melbourne Gasfitter needs to assess your existing pipework, valves, and benchtop setup before giving you an accurate price, since these details can shift the cost considerably from one job to the next. This guide breaks down what actually drives gas cooktop installation cost in Melbourne, so you know roughly where your job is likely to land before you book anyone in.
Prices below are general market estimates based on current Melbourne pricing guides and are not a quote from King and Sons Plumbing. Your exact price will depend on your specific kitchen, existing gas setup, and the cooktop you choose.
How Much Does Gas Cooktop Installation Cost?
For a straightforward like-for-like replacement, where the new cooktop uses the same size cut-out and connects to an existing, compatible gas point, most Melbourne installations fall somewhere in the low-to-mid hundreds of dollars. Once a new gas line needs to be run, an isolation valve needs replacing, or the benchtop cut-out needs to be altered, the price climbs from there, often into the high hundreds, and a job combined with a kitchen renovation involving new cabinetry and a fresh gas point can run into the low thousands. The only way to get an exact figure is to have a gasfitter assess your specific kitchen, since so much depends on what is already in place.
Is Replacing Like-for-Like Cheaper?
Yes, generally by a significant margin. A true like-for-like replacement, where the new cooktop matches the old one closely enough in size and gas point location, is the fastest and most affordable version of this job, since the gasfitter is largely working with an existing, compatible setup rather than modifying pipework or cutting a new benchtop opening. This is the scenario most Melbourne cost guides quote their lowest figures for, and it is worth mentioning to your gasfitter upfront if you know your new cooktop is the same size and type as the one being replaced.
What if There Is Already a Gas Point?
Having an existing, correctly sized gas point nearby keeps costs down considerably, since the gasfitter is connecting to established pipework rather than running a new line. Even with an existing point, the gasfitter will still check that the pipe size, isolation valve, and connection hardware are compatible with the new appliance, since an older point was not necessarily sized or rated for a modern cooktop with a higher gas output.
What if a New Gas Line Is Required?
If there is no existing gas point near the cooktop’s new location, or the existing line is not suitable for the new appliance, a new gas line needs to be run from the meter or an existing branch line. This adds meaningfully to the cost, since it involves additional pipework, fittings, and labour, and the price climbs further if the line needs to travel through brick, concrete, or other difficult access points rather than a straightforward run through a wall cavity or roof space. This is typically the single biggest factor separating a low-cost cooktop swap from a considerably more expensive installation.
Does the Bench Cut-Out Affect the Price?
Yes. If the new cooktop is a different size or shape to the one being replaced, the benchtop needs to be cut, extended, or patched to fit, which adds both time and cost to the job and may require coordination with a benchtop or cabinetry specialist depending on the material involved. A cooktop that matches the existing cut-out dimensions avoids this cost entirely, which is another reason a true like-for-like swap tends to sit at the lower end of the price range.
Does the Isolation Valve Need Replacing?
Sometimes, and this is a common extra cost that comes up during what looks like a simple swap. If the existing isolation valve is old, stiff, corroded, or not compliant with current standards, your gasfitter will generally recommend replacing it as part of the job. This is a relatively small additional cost compared to the overall installation, but it is worth budgeting for as a possibility rather than assuming the existing valve will automatically be reused.
Does Pipe Sizing Need to Be Checked?
Yes, and this step matters more than many homeowners realise. Gas pipework needs to be sized correctly to safely deliver enough gas to meet the appliance’s demand, and a pipe that was adequate for an older, lower-output cooktop may not be sufficient for a newer model with a higher output. A gasfitter will check existing pipe sizing as a standard part of the installation, and if it is found to be undersized for the new appliance, this may require upsizing that section of pipe, which adds to the cost but is essential for safe, compliant operation.
What Happens if the New Cooktop Has a Higher MJ Rating?
Gas appliances are rated in megajoules (MJ) to indicate their gas consumption, and a new cooktop with a significantly higher MJ rating than the one it is replacing can mean the existing pipework and gas meter capacity need to be reassessed. If the existing supply is not sufficient for the new appliance’s higher demand, upgrades to the pipework, and in some cases discussions with your gas distributor about meter capacity, may be needed. This is one of the reasons it is worth telling your gasfitter the specific model and MJ rating of your new cooktop before installation, rather than assuming any gas cooktop will connect the same way as the last one.
Does the Installer Need to Pressure-Test the System?
Yes. After connecting a new gas appliance, a licensed gasfitter is required to pressure-test the system to confirm there are no leaks and that the installation is operating safely at the correct pressure. This is a standard, non-negotiable part of any compliant gas cooktop installation, and it is included as part of the overall installation cost rather than being an optional extra.
Is a Compliance Certificate Required?
Yes. Installing or replacing a gas cooktop is Type A gas appliance work, which requires a compliance certificate in Victoria regardless of the cost of the job. Your licensed gasfitter is required to issue this certificate and lodge it with the Building and Plumbing Commission, and you should expect to receive your copy within a matter of days after the work is completed. A quote for cooktop installation that does not include this certificate is not a compliant quote, and it is worth confirming it is included before booking.
How Long Does Installation Take?
A straightforward like-for-like cooktop swap typically takes a matter of hours, including disconnection of the old unit, connection and testing of the new one, and the paperwork involved in issuing the compliance certificate. Jobs involving a new gas line, benchtop modifications, or coordination with cabinetry work naturally take longer, and may need to be scheduled around other trades if it is part of a broader kitchen renovation.
Can Homeowners Supply Their Own Cooktop?
Yes, homeowners are generally free to purchase their own cooktop and have a licensed gasfitter install it, rather than purchasing the appliance through the gasfitter directly. It is worth checking the appliance’s specifications, particularly its MJ rating and physical dimensions, against your existing setup before purchasing, since this affects whether the installation will be a simple like-for-like swap or a more involved job.
Can a Gas Cooktop Be Installed in an Existing Victorian Home?
Yes, gas cooktops are commonly installed in older Melbourne homes, including established Victorian-era properties, though older homes are somewhat more likely to need pipework upgrades, isolation valve replacement, or benchtop modifications simply due to the age of the existing installation. A gasfitter assessing an older property will typically check the condition and sizing of the existing gas line as a standard part of quoting the job, since ageing pipework is one of the more common reasons a “simple” cooktop installation in an older home ends up needing a bit more work than initially expected.
Get an Accurate Quote for Your Kitchen
Cost guides give you a useful general range, but the only way to know exactly what your gas cooktop installation will cost is to have a licensed gasfitter assess your existing gas point, pipework, and benchtop setup in person. King and Sons Plumbing provides clear, upfront pricing for gas cooktop installations across Melbourne, with compliance certificates issued for every job. Call 03 9993 7122 to book an assessment or get a quote for your kitchen.
