The short answer
A whole-house wet underfloor heating system typically costs £5,000–£8,000 or more in 2026, depending on floor area, the number of zones and whether it is a new build or a retrofit. New builds sit at the lower end because the pipes are laid before the screed; retrofits across an occupied home sit higher because floors may need lifting and rebuilding. Whole houses almost always use a wet system rather than electric, because electricity costs more per unit of heat. These are typical illustrations, not quotes — see the main cost guide for the full picture.
Heating a whole house with underfloor heating is a substantial project, and the price spans a wide range depending on the size of the home and how the work is done. This guide sets out realistic 2026 whole-house figures by property size, explains why new builds are cheaper than retrofits, and flags the items that move the total. All figures are typical illustrations rather than quotes, and a whole-house wet system should be fitted by a Gas Safe registered heating engineer.
Whole-house cost at a glance
- 2-bed home (wet) £4,000–£6,000
- 3-bed home (wet) £5,000–£8,000
- 4-bed home (wet) £7,000–£12,000+
- New build Lower end of range
- Retrofit Higher end of range
- System type Wet (water), not electric
Whole-house cost by property size
The biggest driver is heated floor area, so figures rise with the size of the home. A small two-bedroom house typically comes to £4,000–£6,000 for a wet system, a three-bedroom home £5,000–£8,000, and a larger four-bedroom property £7,000–£12,000 or more. These figures cover the underfloor heating itself — pipework, manifolds, controls and floor build-up — but not a change of heat source. If the project includes switching to a heat pump, that cost is separate and additional.
| Property | New build (wet) | Retrofit (wet) |
|---|---|---|
| 2-bed house | £4,000–£5,000 | £5,000–£6,000 |
| 3-bed house | £5,000–£6,500 | £6,500–£8,000 |
| 4-bed house | £7,000–£9,000 | £9,000–£12,000+ |
Why new builds cost less than retrofits
In a new build or extension, the underfloor heating pipes are laid over insulation before the screed is poured, so the system is part of the floor from the start — there is no existing floor to remove and rebuild. In a retrofit, the installer may need to lift the old floor, add insulation, lay the pipes and either pour new screed or fit a low-profile system, then reinstate the floor finish. That extra labour and materials is what lifts a retrofit toward the top of the range. For what the work involves, see how underfloor heating is installed.
What else moves the total
- Number of zones — heating rooms independently means more thermostats and zone valves, which adds to the controls cost.
- Floor finishes — tile and stone suit UFH well; engineered wood and rated laminate need the right build-up. See underfloor heating under laminate and wood floors.
- Heat source — a whole-house wet system pairs well with a heat pump, but the heat-pump cost is separate from the UFH.
- Making good — reinstating skirting, doors and floor finishes after a retrofit.
- Manifold and pump — the fixed plant cost is shared across the whole house, which helps the per-m² rate. See cost per square metre.
Running cost and efficiency
A whole-house wet system runs at a low flow temperature, which makes it efficient and well suited to a heat pump — one reason many people install UFH and a heat pump together. The lower running cost helps offset the higher fitting cost over the years; see underfloor heating running costs and is underfloor heating worth it. New systems must meet the efficiency standards under Building Regulations Part L. This is general information; the real figure depends on your home, floor finishes and heat source, and a whole-house wet system should be fitted by a Gas Safe registered heating engineer.
Compare underfloor heating quotes
Whole-house prices vary widely between installers. Use our service to compare quotes from a Gas Safe heating engineer in your area.
Frequently asked questions
How much does underfloor heating cost for a 3-bedroom house?
A typical three-bedroom house comes to £5,000–£8,000 for a wet underfloor heating system in 2026, with new builds at the lower end and retrofits at the higher end. The figure covers pipework, manifolds, controls and floor build-up, but not a change of heat source. These are typical illustrations, not quotes.
Is electric underfloor heating used for a whole house?
Rarely. Electric mats cost more per unit of heat, so running a whole house on electric UFH is expensive. Whole homes almost always use a wet system fed by a boiler or heat pump; electric is best kept to single rooms. See wet vs electric.
Is it cheaper to fit underfloor heating during a renovation?
Yes — if the floors are already up for a renovation, extension or heat-pump install, the underfloor heating is far cheaper to fit than as a standalone retrofit, because much of the disruptive groundwork is already being done.
Does a whole-house system need a heat pump?
No, a wet system can run off a conventional boiler, but UFH’s low flow temperature suits a heat pump particularly well, which is why the two are often installed together. The heat-pump cost is separate from the underfloor heating itself.
Sources & further reading
- Energy Saving Trust — underfloor heating, heat pumps and whole-house heating
- Gas Safe Register — registered heating engineers for wet systems
- NICEIC — registered electricians for electrical work
- Manufacturer guidance — floor build-up, zoning and system specification
- GOV.UK / Building Regulations Approved Document L — efficiency standards
This is general information, not advice for your specific property or installation. Whole-house costs vary with your home, floor finishes, heat source and chosen installer. A whole-house wet system should be fitted by a Gas Safe registered heating engineer. We are an independent information and introduction service, not an installer.