Underfloor Heating Cost Australia: The 2026 Guide

 These figures include the heating system and thermostat supply, plus a standard electrical connection by a licensed electrician. Costs vary depending on the complexity of the electrical connection, the accessibility of the subfloor, and your location in Australia. 

As a practical example, a typical Australian bathroom of 5 square metres with a Thin Heating Mat system costs around $600 to $900 fully installed, including the thermostat. That is a one-off cost for a system that runs for decades with zero maintenance. 

For a full breakdown of Comfort Heat electric products, visit the electric underfloor heating overview page. If you want to manage the install yourself, our DIY Electric Kit includes a custom design layout and full technical support from our team. 

Want a precise cost estimate for your room? Get a free quote from Comfort Heat and we will provide a custom design layout with your quote at no extra charge.

Hydronic Underfloor Heating Installation Costs in Australia

Hydronic underfloor heating involves a more complex installation than electric systems, which is reflected in the higher upfront cost.  

The payoff is a highly efficient whole-home heating system with lower long-term running costs, particularly when paired with the Intaflo heat pump and rooftop solar. 

Current hydronic installation cost ranges in Australia: 

For a medium-sized new build of around 200 square metres, a complete hydronic underfloor heating system including in-screed pipe, manifold, and Intaflo heat pump typically costs between $30,000 and $50,000 fully installed. For an in-slab system in a new concrete build, the cost is lower because the pipe goes in before the pour. 

Hydronic systems are recommended for areas of 80 square metres and above, with an absolute minimum of 40 square metres. Below that threshold, electric heating is the more economical choice. 

To explore the full hydronic product range, visit the hydronic underfloor heating overview page.  

For a side-by-side comparison of electric and hydronic systems including cost, visit our electric vs hydronic underfloor heating guide. 

Underfloor Heating Running Costs in Australia

Running costs are where underfloor heating really proves its value. Because the system heats the floor surface directly and is controlled by a precise thermostat, it only runs when it needs to.  

There is no wasted heat, no air loss through ducts, and no overcooling between cycles. 

Electric Underfloor Heating Running Costs 

Electric underfloor heating in Australia costs around 2 to 5 cents per square metre per hour to run. The actual figure depends on your electricity tariff, the floor covering, the insulation of the room, and how long the system runs each day. 

Here are some real-world examples based on current Australian electricity rates: 

Electricity tariffs vary across Australia. You can check current rates at the Australian Energy Regulator. For an exact running cost based on your tariff and floor size, the Comfort Heat Cost Calculator does the calculation for you. 

Hydronic Underfloor Heating Running Costs 

Hydronic underfloor heating paired with the Intaflo Series 3 heat pump is the most energy-efficient whole-home heating option in Australia.  

The heat pump achieves a coefficient of performance (COP) of around 3.45, which means it delivers 3.45 units of heat energy for every 1 unit of electricity consumed. For a medium-sized home of around 160 square metres, annual running costs typically sit between $1,200 and $1,500 per year, based on estimates from Sustainability Victoria. 

When combined with rooftop solar, running costs reduce further. Pre-heating the slab during peak solar hours (roughly 10am to 3pm) means the floor holds warmth into the evening at no electricity cost. The larger the solar system and the more thermal mass in the slab, the greater the saving. 

How to Calculate Your Underfloor Heating Running Cost 

Working out exactly what your underfloor heating will cost to run is straightforward once you know three numbers: the heat load of the system (watts per square metre), your electricity tariff (cents per kWh), and how many hours per day the system runs. 

Comfort Heat uses the following formula to estimate electric running cost per hour: 

Electric cost per hour = [ (heat load in watts / 1000) x electricity tariff ] x 0.65 

The 0.65 factor accounts for the thermostat duty cycle. Once the floor reaches temperature, the thermostat cycles the system on and off to maintain it. On average, the system is active about 65% of the time during a heating window. Keeping doors closed reduces this further and cuts running costs. 

For hydronic systems with the Intaflo heat pump, the formula adjusts for the heat pump's COP: 

"Hydronic cost per hour = [ (heat load / 1000) x electricity tariff x 0.65 ] / 3.45"

You do not need to do this maths manually. The Comfort Heat Cost Calculator handles all of it. Enter your floor size, your electricity tariff, and your daily usage window, and it returns your estimated running cost per hour, per day, and per season. 

Use the Comfort Heat Cost Calculator to get your personalised running cost estimate now.

What Does a Thermostat Add to the Cost? 

Every underfloor heating system needs a thermostat. The thermostat controls when the system runs, what temperature it holds, and how it responds to changes in the room.  

A good thermostat is not just a convenience, it is the tool that keeps your running costs low. 

Comfort Heat offers two thermostat options for most installations. The MWD5 Programmable Wi-Fi Thermostat allows full remote control from your phone and costs around $250 to $350 supply and install. It supports multiple daily schedules, away mode, and temperature limits to protect sensitive floor coverings.  

The MCD3 Standard Control Thermostat is a simpler, reliable option for straightforward installations and costs around $200 to $280 supply and install. 

Both thermostats include a floor sensor as standard and are available across the full Comfort Heat thermostat range.  

A thermostat that is set well, heating only when the room is in use, can reduce running costs by 30 to 50% compared to running the system continuously. 

Comfort Heat tip: Set your thermostat to switch on 30 to 60 minutes before you need warmth. Tiles and screed take time to reach temperature, so a head start means the floor is comfortable when you walk in. Read our guide to zone-controlled underfloor heating for more on managing costs across multiple rooms

Ways to Reduce Your Underfloor Heating Costs 

A few simple steps can make a meaningful difference to what you pay to run underfloor heating across an Australian winter. 

• Use a smart thermostat schedule: Program your system to run only when rooms are in use. The MWD5 Wi-Fi Thermostat lets you set multiple daily windows and adjust them from your phone.
• Run off solar where possible: If you have rooftop solar, schedule your heating to run during generation hours to offset electricity costs. 
• Insulate well: Good insulation under and around the heated area reduces heat loss and lowers the duty cycle of the thermostat. This directly reduces running costs. 
• Use zone control: Heat only the rooms you are using. A zoned hydronic system or independent electric thermostats per room mean you never pay to heat empty spaces. 
• Choose the right floor covering: Dense, heat-retaining floor coverings like porcelain tiles hold warmth longer after the system cycles off. This reduces how often the system needs to run. 
• Install at renovation time: The earlier underfloor heating is installed in a project, the lower the labour cost. Adding it to an existing tiled bathroom is more expensive than installing during a retile. See our guide to how to compare floor heating quotes for tips on getting the best value. 

For more on how different floor coverings affect cost and performance, read our article on the best flooring for underfloor heating. 

Is Underfloor Heating Worth the Cost in Australia? 

For most Australian homeowners, the answer is yes.  

Underfloor heating is not cheap to install, but the ongoing cost is low, the maintenance cost is zero for electric systems, and the comfort benefit is significant. There are also no moving parts to wear out, no filters to clean, and no service calls to budget for. 

The strongest case for underfloor heating is in bathrooms. A 5 square metre bathroom system costs around $800 to install and less than $65 to run for an entire winter.  

For that, you get warm tiles every morning and evening, no cold shock underfoot, a drier bathroom, and no portable heater risk in a wet area. For most Australian families, that represents outstanding value. 

For whole-home heating, the value case is strongest in cold climates and larger homes where hydronic with the Intaflo heat pump is used. The higher upfront cost is offset by lower running costs, solar compatibility, and the fact that the system adds genuine value to the property. 

For a deeper look at whether underfloor heating makes financial sense for your specific situation, read our article: are underfloor heating systems expensive? And for a direct comparison with ducted gas heating, read our ducted heating vs underfloor heating guide. 

Ready to get a cost estimate for your project? Contact the Comfort Heat team for a free, no-obligation quote. We include a custom design layout with every quote — the only heating company in Australia to do this as standard. 

Cost Summary by System Type 

Here is a quick reference for underfloor heating costs across all main system types in Australia. 

Frequently Asked Questions

How much does underfloor heating cost to install in Australia?

Electric underfloor heating costs between $80 and $200 per square metre installed, depending on the system. A typical bathroom installation costs $600 to $900 fully installed. Hydronic systems cost $150 to $250 per square metre for pipe and screed, plus the heat source. Full hydronic whole-home systems in a medium-sized new build typically cost $30,000 to $50,000 installed.

How much does underfloor heating cost to run per day in Australia?

For a standard 5 square-metre bathroom running for 4 hours per day, electric underfloor heating costs around 65 to 90 cents per day. For a 12 square-metre kitchen running for 5 hours, expect around $1.30 to $2.00 per day. Use the Comfort Heat Cost Calculator to get a figure for your specific floor size and tariff.

Is underfloor heating expensive to run?

No. Electric underfloor heating costs 2 to 5 cents per square metre per hour to run. Because the system heats a specific area with a precise thermostat, there is very little wasted energy. A whole winter of bathroom heating typically costs less than $65 for most Australian households.

What is the cheapest underfloor heating system to install in Australia?

Carpet Heating Mats and Electric Slab Cable are the most affordable systems to install. For renovations, Thin Heating Mats are the most cost-effective option because they sit within the tile adhesive layer and require no extra floor build-up.

Does underfloor heating add value to a home in Australia?

Yes. Underfloor heating is an increasingly expected feature in premium Australian homes, particularly in bathrooms, kitchens, and master bedrooms. Hydronic whole-home heating adds meaningful value to properties in cold climate zones like Victoria, the ACT, Tasmania, and alpine regions.

How do I calculate my underfloor heating running cost?

Use the formula: [(heat load in watts / 1000) × electricity tariff] × 0.65 to get cost per hour. Or skip the maths and use the Comfort Heat Cost Calculator, which lets you enter your floor size and tariff to get a running cost estimate instantly.