Underfloor heating in Southampton

Postcode districts: SO14, SO15, SO16, SO17, SO18, SO19
Nearby: Hythe, Totton and Hedge End
Guide price: £800–£2,800
Typical time on site: 1–2 working days (added to a fit)
Water: Hard across most of Hampshire
Survey: Free, at your home

What does bathroom underfloor heating cost in Southampton?

For Southampton, our guide range for bathroom underfloor heating is £800 to £2,800 including VAT. Labour costs in South East England put local prices at about 12% above the UK guide figure. The figure depends on the size of the room, whether anything moves, and the products you pick.

Typical

Electric mat

£800–£1,700

Insulation board

Electric, larger room

£1,350–£2,500

Electrician sign-off

Wet system

£1,700–£3,400

Pipes linked to the heating

Guide prices for Southampton including VAT. Your itemised written quote after the free survey is the price that counts.

Working in Southampton

We work right across Southampton — SO14, SO15, SO16 and 3 more postcode districts — and in neighbouring Hythe and Totton.

In a city the size of Southampton, parking and access for a skip are worth sorting before the start date — we will ask at the survey. If your Southampton bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer. Whether your Southampton bathroom is a small en-suite or a large main bathroom, the mat is sized to the open floor, not the whole room.

Supplies across most of Hampshire are hard. Hard water leaves white marks on dark grout and gloss tiles, so matt finishes and stain-resistant grout are the practical choice. Hardness varies street by street, so check the figure for your postcode with your water supplier.

What the job includes

Bringing the system up to temperature gradually once the adhesive and grout have cured
The electric mat or cable laid to the open floor, kept clear of where the WC, bath and fixed furniture will sit
Resistance and insulation tests on the mat before, during and after tiling, with the readings recorded
For wet systems, pipes in low-profile boards or screed connected to a manifold or single-zone kit, with any boiler work done by a Gas Safe registered engineer

Decisions to make first

Floor heating and towel rail

Underfloor heating warms the room; a towel rail dries towels. Many bathrooms have both, and a dual-fuel rail keeps working in summer when the boiler is off.

Insulation board thickness

Thicker boards warm up faster and lose less heat downwards, but raise the floor; the right choice depends on the door threshold and the next room.

Rules that apply in England

In England, a new circuit for underfloor heating is notifiable under Part P, and so is connecting it to an existing circuit in a room with a bath or shower. The electrician either self-certifies through a competent person scheme or the work is notified to building control.

More about underfloor heating

Underfloor heating in Southampton: questions

How much does bathroom underfloor heating cost in Southampton?

Bathroom underfloor heating in Southampton usually costs £800–£2,800 including VAT. Expect the lower end for a like-for-like job with standard products, and the upper end if things move or you choose premium finishes. Your quote is itemised and fixed in writing once agreed.

Do you cover SO14 in Southampton?

Yes. We cover all of Southampton, including SO14, SO15, SO16, SO17 and 2 more postcode districts, and nearby Hythe, Totton and Hedge End. Survey visits are free and arranged at a time that suits you.

Is the water hard in Southampton?

Who handles building control for bathroom underfloor heating in Southampton?

Building control for Southampton is handled by the local council or an approved inspector. If your job needs sign-off — for example a new circuit, new drainage or a new extractor where there was none — we tell you at the survey and handle the notification as part of the work.

Is electric underfloor heating expensive to run in a bathroom?

Running cost depends on the heated area, the insulation under the mat, how long it runs and your electricity tariff. As an example, a 150 W per m² mat covering 3 m² draws 450 W, so two hours a day uses about 0.9 kWh. A timer and floor sensor stop it running when nobody is using the room.