- Postcode districts
- SM1, SM5, SM6
- Nearby
- Sutton, Mitcham and Morden
- Guide price
- £9,400–£18,750
- Typical time on site
- 8–15 working days
- Water
- Very hard across most of Greater London
- Survey
- Free, at your home
What does a bathroom renovation cost in Carshalton?
Guide price in Carshalton: £9,400–£18,750 including VAT, depending on the room and what you choose. We adjust the national guide for London, where prices are typically about 25% above the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.
Refresh
- Make good and decorate
Full renovation
- Back to brick or studwork
Structural
- New drainage route
Guide prices for Carshalton including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Carshalton
As well as Carshalton itself (SM1, SM5 and SM6), we survey in Sutton, Mitcham and Morden.
London homes in Carshalton often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. Whether your Carshalton bathroom needs a refresh or a full strip back to brick, the written quote shows both where both are realistic. If your Carshalton home is older and the bathroom still has original pipework or plaster behind the tiles, the survey shows whether a renovation or a refit makes more sense.
Supplies across most of Greater London are very hard. We plan easy-clean glass, rimless toilets and finishes that do not show limescale. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Strip-out back to brick or studwork, with waste taken away by a licensed waste carrier
- Re-plastering or boarding, with cement-based boards and tanking in the wet areas
- Repairs to rotten floorboards, joists or other timber found once the room is open
- New wiring, lighting, extractor fan and RCD protection, installed and certified by a qualified electrician
Decisions to make first
Plaster or boards
Plaster suits dry walls that will be painted. Cement-based tile backer boards are the better base behind showers and under heavy tiles.
Shower floor
With the floor already up, a renovation is the easiest time to form a level shower floor or a full wet room.
Rules that apply in England
In England, structural changes, new drainage or a new connection to the soil stack under Part H, and new circuits under Part P can all be building regulations work. A registered electrician can self-certify the electrics; structural and drainage work may need a building notice or a full plans application to building control.

