The cost of installing underfloor heating in a bathroom in Sydney depends mainly on whether you choose an electric system (most common for bathrooms) or a hydronic system (water-based, usually for whole homes).
Here’s a realistic breakdown based on current Australian installation ranges:
💰 Typical Cost (Bathroom Underfloor Heating – Sydney)
🔌 Electric underfloor heating (most popular for bathrooms)
$50 – $300 per m² for materials
$900 – $1,500 per room installed (typical bathroom range) (Wellsons)
Small bathrooms often land around $1,200–$2,500 total installed
👉 This is the system most commonly used in bathroom renovations because it’s thin, fast to heat, and easy to retrofit under tiles.
💧 Hydronic underfloor heating (water-based system)
$100 – $400 per m² for materials
$800 – $1,600+ per room just for installation components (excluding boiler/system setup) (Wellsons)
Full system costs can jump to $12,000–$25,000+ for whole-home setups (livella.com)
👉 Rarely used for bathrooms alone due to high setup cost.
🧱 What actually drives the cost?
Your final price depends on:
Bathroom size (m² is the biggest factor)
Whether tiles are already being replaced (best time to install)
Subfloor condition (levelling may add cost)
Thermostat and zoning setup
Access and labour complexity
Small bathrooms are more cost-effective because most installers have a minimum job charge, even if the area is tiny.
📊 Realistic Sydney bathroom example
For a typical 5–8m² bathroom:
Basic electric underfloor heating: $1,200 – $2,000
Mid-range system with thermostat: $1,800 – $3,000
Premium zoning / smart controls: $2,500 – $3,500+
⚡ Running cost (important to know)
Around $0.03 per m² per hour for electric systems (livella.com)
Most bathrooms cost roughly $0.20–$0.60 per day when used in winter mornings only
👉 It’s usually considered a comfort luxury, not a high running-cost system when used with timers.
🧠 Simple takeaway
Electric heating = cheapest + best for bathrooms
Hydronic = expensive + only worth it for whole homes
Most Sydney bathroom installs sit around $1.2K–$3K all in
What’s next?
If you’re planning a bathroom renovation, underfloor heating is best installed at the waterproofing + tiling stage, where labour overlap keeps costs down.
Contact our Sydney team today to find out more other kitchen renovation services.
