Quick answer: boilers are uncommon in Australian homes. Where they are used, it is for hydronic heating: Tempco Energy puts a complete hydronic system at $12,000–$40,000 and a gas boiler for one at $3,000–$7,000 supplied and installed. Ducted gas heating costs $3,000–$10,000, and ducted reverse-cycle air conditioning about $9,000–$20,000. All figures in AUD, checked September 2026.
Boiler cost checker
Pick a job to see the typical Australian price range from published cost guides, with the source for each figure. It is a guide, not a quote.
Prices change and depend on the size of the job, the property, access and location. Figures were last checked . Always get a written quote before work starts.
Request a free quoteA straight answer first: boilers are a niche way to heat a home in Australia. Most homes that have whole-house heating use reverse-cycle air conditioning or ducted gas heating, and many rely on split systems or space heaters. Water-based (hydronic) heating, where a gas boiler or heat pump warms water that runs through radiators or underfloor pipes, is a specialist product; in the public business listings we checked, hydronic specialists cluster in Melbourne, Canberra and Hobart. So this page covers all three: hydronic systems, ducted gas and heat pumps.
The cheapest system to buy is not always the cheapest to run, and the rules are changing. Victoria will require new homes to be all-electric from 1 January 2027 and gas hot water systems to be replaced with electric ones at end of life from 1 March 2027, while existing gas space heating is unaffected. The figures below are in Australian dollars, come from published cost guides, and were checked in September 2026. Where we could not source a figure, we have left it out.
Heating prices by job
These are published ranges from installers’ and comparison sites’ cost guides, not independent surveys, so treat them as a benchmark rather than a price list.
| Job | Typical range (AUD) | Basis | Source |
|---|---|---|---|
| Gas boiler for a hydronic system | $3,000–$7,000 | Supplied and installed | Tempco Energy hydronic cost guide |
| Complete hydronic heating system | $12,000–$40,000 | Installed, whole home | Tempco Energy hydronic cost guide |
| Hydronic panel radiator | $700–$1,500 each | Installed, including pipework and valves | Tempco Energy hydronic cost guide |
| Hydronic underfloor retrofit (screed) | $80–$150 per m² | Excluding boiler or heat pump | Tempco Energy hydronic cost guide |
| Ducted gas heating system | $3,000–$10,000 | Supplied and installed | Tempco Energy ducted gas cost guide |
| New mains gas connection, if the home has none | $500–$2,000+ | Added to a ducted gas install | Tempco Energy ducted gas cost guide |
| Ducted reverse-cycle air conditioning | $9,000–$20,000 | Installed, by home size | Canstar Blue (citing Global Cool Air) |
| Heat pump hot water system | $2,500–$4,500 | Installed, before rebates | Tempco Energy hot water cost guide |
Tempco says a gas boiler and panel radiator system for a three-bedroom Melbourne home generally falls between $12,000 and $22,000, and in-slab underfloor pipework in a new build costs about $50–$100 per m² before the heat source. For ducted gas it breaks the price down by home size:
| Home size | Ducted gas system, installed (AUD) |
|---|---|
| Up to 130 m² | $3,000–$4,500 |
| 130–200 m² | $4,500–$6,000 |
| 200–280 m² | $6,000–$7,500 |
| 280 m²+ or multi-zone | $7,500–$10,000+ |
Canstar Blue’s ducted air conditioning figures (from Global Cool Air) are $9,000–$11,500 for a small single-storey home, $12,000–$14,500 for a medium single-storey home and $15,000–$20,000 for a large multi-storey home. For the running-cost side of the decision, see heat pump or replacement gas boiler and boiler flow temperature.
Rebates and rules by state in 2026
| State | What we found (September 2026) |
|---|---|
| Victoria | Victorian Energy Upgrades: up to $1,610 off an efficient reverse-cycle air conditioner and $630 off a heat pump hot water system. Solar Victoria hot water rebate up to $1,000 ($1,400 for locally made products). New homes all-electric from 1 January 2027. |
| New South Wales | Energy Savings Scheme discounts through accredited installers; the NSW Government gives $405–$675 as a typical incentive for replacing an electric water heater with a heat pump. |
| Queensland | The Climate Smart Energy Savers appliance rebate has closed. Federal STCs still apply to heat pump hot water. |
| Western Australia | No state heat pump rebate found; federal STCs still apply. |
| South Australia | Retailer Energy Productivity Scheme offers from energy retailers, with further discounts for priority group households. |
Nationally, heat pump and solar hot water systems can earn small-scale technology certificates (STCs) under the federal Small-scale Renewable Energy Scheme; the installer normally passes their value on as an upfront discount.
Who may do the work
Gasfitting is licensed in every state, but by different bodies: NSW Fair Trading, the Building and Plumbing Commission in Victoria (which replaced the Victorian Building Authority on 1 July 2025), Resources Safety and Health Queensland (with QBCC licensing contractors), Building and Energy in Western Australia, and Consumer and Business Services in South Australia. Our city guides explain each one and how to check a licence.
City guides
- Heating in Sydney: hydronic, ducted, licences and rebates
- Hydronic and gas heating in Melbourne: rules, rebates and installers
- Heating in Brisbane: gas licences, heat pumps and installers
- Heating in Perth: gas licences, ducted and hydronic options
- Heating in Adelaide: hydronic, ducted, licences and REPS offers
Ready to compare? See our heating options comparison or request a quote.
Frequently asked questions
How much does a boiler cost in Australia?
A gas boiler for a hydronic heating system typically costs $3,000–$7,000 supplied and installed, according to Tempco Energy’s 2026 guide. A complete hydronic system with radiators or underfloor pipes costs $12,000–$40,000.
Why are boilers rare in Australian homes?
Most Australian homes that have whole-house heating use ducted gas or reverse-cycle air conditioning, which also cools. Hydronic systems cost more to install and are most often found in cooler areas such as Melbourne and Canberra.
Can I still install gas heating in Victoria?
In an existing home, yes: the Victorian Government says there is no change to existing gas space heating appliances. New homes that need a planning permit lodged from 1 January 2024 cannot connect to mains gas, and all new homes must be all-electric from 1 January 2027.
Is there a rebate for a gas boiler?
We found none. The state discounts we found are for efficient electric appliances such as reverse-cycle air conditioners and heat pump hot water systems.
Are these prices quotes?
No. They are published ranges checked in September 2026. Your price depends on your home, the system and the installer.
Sources
- Hydronic Heating Cost in Australia: 2026 Price Guide (tempcoenergy.com.au)
- How Much Does Ducted Gas Heating Cost? 2026 Price Guide (tempcoenergy.com.au)
- Hot Water System Installation Cost Australia (2026 Guide) (tempcoenergy.com.au)
- How much does ducted air conditioning cost? (canstarblue.com.au)
- Victoria’s Gas Substitution Roadmap (planning.vic.gov.au)
- Victorian Energy Upgrades for homes (energy.vic.gov.au)
- Hot water rebate (solar.vic.gov.au)
- Household energy saving upgrades (energy.nsw.gov.au)
- Climate Smart Energy Savers rebate (qld.gov.au)
- Energy discounts and offers from retailers (sa.gov.au)
- Hot water rebate: Small-scale Renewable Energy Scheme (energy.gov.au)
- A new regulator with new powers (vba.vic.gov.au)
Last checked: September 2026. Grants, rules and prices change, so confirm the current position with your state regulator, the rebate programme or the installer before you commit.
Best Boiler Deals is a comparison and referral service, not a heating installer. We do not install, service or repair boilers, heat pumps or heating systems, and a listing here is not a recommendation.