Underfloor heating in Carshalton

Postcode districts: SM1, SM5, SM6
Nearby: Sutton, Mitcham and Morden
Guide price: £900–£3,100
Typical time on site: 1–2 working days (added to a fit)
Water: Very hard across most of Greater London
Survey: Free, at your home

What does bathroom underfloor heating cost in Carshalton?

For Carshalton, our guide range for bathroom underfloor heating is £900 to £3,100 including VAT. Labour costs in London put local prices at about 25% 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

£900–£1,900

Insulation board

Electric, larger room

£1,500–£2,800

Electrician sign-off

Wet system

£1,900–£3,800

Pipes linked to the heating

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

Working in Carshalton

In Carshalton we cover SM1, SM5 and SM6; we also cover Sutton, 1.9 miles away, and Mitcham.

London homes in Carshalton often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. We check door thresholds in Carshalton homes at the survey, because underfloor heating and new tiles raise the floor slightly. Where a Carshalton home already has a heat pump, or the heating is being altered, a wet underfloor system is worth comparing with electric.

Supplies across most of Greater London are very 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

A dial, programmable or smart thermostat, with the supply RCD protected, tested and certified by a qualified electrician
A check of the floor construction, the room's heat loss and where the thermostat and supply will go
The electric mat or cable laid to the open floor, kept clear of where the WC, bath and fixed furniture will sit
Bringing the system up to temperature gradually once the adhesive and grout have cured

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.

Floor finish

Tiles and stone pass heat through well. LVT and vinyl can work, but check the maximum floor temperature the flooring maker allows.

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 Carshalton: questions

How much should I budget for bathroom underfloor heating in Carshalton?

Bathroom underfloor heating in Carshalton usually costs £900–£3,100 including VAT. Where you land in that range depends on the size of the room, whether the layout changes and the products you choose. After the free survey you get an itemised written quote, and the price is fixed in writing once the layout and products are agreed.

Is the home survey in Carshalton really free?

Yes. We visit, measure the room, check the pipework, drainage and electrics, and talk through what you want. You then get a written, itemised quote with no obligation to go ahead.

Do you cover SM1 in Carshalton?

Yes. We cover all of Carshalton, including SM1, SM5 and SM6, and nearby Sutton, Mitcham and Morden. Survey visits are free and arranged at a time that suits you.

Is the water hard in Carshalton?

Can underfloor heating go under a bath or shower tray?

No. Electric underfloor heating must not be laid under baths, shower trays, WCs or fixed furniture, because trapped heat can damage the cable and the item above it. It covers the open floor you stand on, and in a wet room it can run under the tiled shower area.