How Much Does Underfloor Heating Cost in 2026? (UK)
Wet (water) underfloor heating in 2026 UK costs £45–£75/m² as a retrofit and £30–£55/m² in new build. Electric UFH (best for bathrooms and small rooms) runs £25–£45/m². A whole-house wet system in a typical 3-bed (90 m²) totals £4,500–£9,000 fitted. Pair it with a heat pump and UFH runs 25–40% cheaper than radiators on the same floor area.
Planning the work? Check what it usually costs, or work out your own estimate. The free quote form is at the top of this page.
2026 UFH cost breakdown by system type
Two systems dominate the UK market in 2026:
- Wet (water) UFH — pipework loops in screed or low-profile boards, fed by a manifold from a boiler or (ideally) a heat pump. Lowest running cost; best for whole-house and large open-plan areas.
- Electric UFH — thin heating mat or loose wire under tile/stone. Cheap to install, expensive to run continuously. Best for bathrooms, en-suites and small kitchens.
Wet UFH cost per m² (2026)
- New build / first-floor screed: £30–£55/m² supply & fit (including manifold share)
- Retrofit on existing concrete (overlay boards): £55–£75/m²
- Retrofit between joists (suspended floor): £45–£65/m²
- Manifold + controls (1-off): £600–£1,200
- Heat pump compatibility extra (low-profile/wider pipe centres): +£5–£10/m²
Electric UFH cost per m² (2026)
- Heating mat (under tile, even rectangle): £25–£35/m² supply & fit
- Loose wire (awkward shapes, around WC/basin): £35–£45/m²
- Thermostat (smart, Wi-Fi): £120–£220 per zone
- Typical small bathroom (4 m²): £250–£450 fitted (excluding tiling)
What a whole-house wet UFH install really costs in 2026
For a typical 3-bed semi (90 m² heated floor) the realistic 2026 budget is:
- Pipework + screed/overlay: £3,500–£6,500
- Manifold + actuators + zone valves: £900–£1,500
- Smart room thermostats (5 zones): £500–£900
- Heat pump tie-in (if installing with ASHP): £400–£800 extra plumbing
- Total fitted: £4,500–£9,000 (excludes the heat pump or boiler itself)
Running cost: UFH vs radiators in 2026
UFH runs at a lower flow temperature (35–45°C) than radiators (60–70°C), which makes it the natural partner for an air source heat pump. On a 2026 typical gas tariff (~7p/kWh) UFH saves about 8–15% vs radiators. On a heat pump it saves 25–40% because the COP rises sharply at lower flow temperatures.
When UFH is worth it
- You’re fitting a heat pump — UFH is the highest-COP emitter you can pair with one
- You’re building, extending or doing a full floor-up renovation
- You want open-plan kitchen-diner or living space with no radiators on the walls
- You have hard floors (tile, stone, engineered wood) which transmit UFH heat well
When UFH is NOT worth it
- You’re only replacing a boiler and keeping the existing radiator circuit — the install disruption isn’t worth the marginal saving
- You have thick carpet with deep underlay — insulates the heat away from the room
- You’re refurbishing one bedroom only — electric UFH might fit; wet retrofit usually won’t pay back
How to get a fair UFH quote in 2026
1. Specify wet or electric upfront
Quotes for the two systems aren’t comparable. Decide first.
2. Insist on a heat-loss calculation
A proper installer does a room-by-room heat-loss before quoting pipe centres and flow temperatures — especially for heat pump installs.
3. Confirm flooring compatibility
Engineered wood: TOG < 1.0. Carpet + underlay: combined TOG < 1.5. Get this in writing.
4. Compare three local installers
Use BestBuilders to match with three vetted UFH installers near you.
How long underfloor heating lasts — and what maintenance it needs
Wet UFH is one of the longest-lived parts of a heating system. The buried PE-RT / PEX-a pipe is rated for a 50-year design life and, because it is laid in one continuous loop with no joints under the screed, there is nothing to leak once it has been pressure-tested and signed off. The wear items all sit at the manifold, where you can reach them: the actuators and zone valves typically last 10–15 years, and the circulating pump and blending valve around 10–20 years. Budget a modest replacement of those parts once over the system’s life rather than a whole re-lay.
Maintenance is light: keep the system inhibitor topped up (the same inhibitor that protects your boiler or heat pump), have the manifold flow rates re-balanced if a zone runs cold, and never drill or nail into the floor without the loop layout to hand. If you are pairing UFH with a heat pump, our running-cost comparison of UFH versus radiators and the air source heat pump cost guide show where that long life turns into long-term savings.
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