Bathroom Renovation Mitcham

GS Renovation renovates bathrooms across Mitcham, making the most of the sometimes tight bathroom spaces in the interwar terraces and semis, post-war houses and flats of CR4. We handle everything from waterproofing and tanking to tiling, underfloor heating and the drainage, so the finished room lasts.

In Mitcham, a full bathroom refit typically costs £6,000 to £20,000 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Mitcham: we carry the tanking, plumbing and tiling as one contract, with the electrics certified by a registered electrician.

How the job runs

1. Free design visit at your Mitcham home and an itemised quote.
2. Strip-out, then first-fix plumbing and electrics.
3. Tanking to the wet areas, then tiling.
4. Sanitaryware and second fix, with notifiable electrics certified by a registered electrician. Typically 10 to 15 working days on site.

Wet rooms and en-suites in Mitcham houses

Interwar Mitcham houses were rarely built with the bathrooms families want now, so we often reconfigure the original layout to create a proper walk-in shower, a wet room, or an en-suite carved out of a bedroom or a landing recess. Getting a wet room right starts below the tiles, with full tanking and waterproofing so there is no risk of water tracking into the floor structure of an older house. That groundwork matters far more than the finish that sits on top.

Drainage and ventilation are planned from the start, because a good-looking bathroom that steams up or drains slowly is a false economy. We set falls correctly, run new soil and waste where the original runs are undersized, and fit extraction that actually clears the moisture. In the smaller bathrooms typical of CR4 houses, careful layout and space-saving fittings free up room without making the space feel cramped.

Housing in Mitcham

The Council Tax list puts Mitcham at about 10,560 homes, 46% flats against 53% houses; 10% went up before 1919, 38% between the wars and 51% after 1945. 40% of homes here are terraced; a terrace bathroom in Mitcham vents front, back or up, never into a party wall.

A bathroom above a neighbour's ceiling in a Mitcham flat

46% of homes in Mitcham are flats, and a bathroom in an upper flat sits directly over someone else's home. A slow leak from a shower tray or a badly sealed waste does its damage in the neighbour's ceiling, often weeks before anyone upstairs notices. So a flat bathroom here is built for containment. The whole floor is tanked rather than just the shower area, the isolation valves are reachable without lifting tiles, and the bath and trap get an access panel. Check the lease for any clause on flooring or waterproofing before the design is fixed.

40% of Mitcham homes are terraced houses, and in a terrace the soil stack decides the layout. It normally sits on the rear wall, so a bathroom or en-suite at the front of the house needs a long waste run. That run needs a steady fall and has to cross the joists without deep notching, which limits where a WC can go. A pumped macerator can help a basin or shower, but it is noisy and needs a dedicated circuit. Plan every waste route back to the stack before any tiles or sanitaryware are chosen.

Tiling, heating and finish across CR4

Once the room is watertight, the finish is where a Mitcham bathroom earns its keep. We tile floors and walls to a standard that suits a period home, set out so the lines run true against the not-always-square walls of a 1930s house. Underfloor heating warms the floor and frees up wall space that a radiator would otherwise take, which is welcome in the compact bathrooms these interwar homes were built with.

We coordinate the plumbing, the electrics and the tiling so the trades follow in the right order and nothing is disturbed later. New circuits and changes around the bath or shower are notifiable under Part P, so a registered electrician certifies them or they are notified to building control, and there is no planning permission needed for an internal bathroom. From a family bathroom refit to a discreet en-suite, the result is built to cope with daily use for years.

A listed building is the exception: work that affects its character, inside or out, including an extension or taking out a wall or chimney breast, needs listed building consent from Merton Council, and doing it without consent is a criminal offence.

• Walk-in showers and wet-room installation
• Tanking membranes and waterproof boards behind tiles
• Complete bathroom design and planning

VOA Council Tax stock of properties, March 2025, for Mitcham East, Mitcham West and Mitcham South. Counts rounded by the VOA.

If you are weighing up options for your Mitcham property, it is worth reading chimney breast removal in Mitcham, bathroom renovation across Merton, bathroom fitting in London, our London bathroom renovation page and Tiling Cost.

Why Mitcham Homeowners Choose GS Renovation

Mitcham homeowners choose GS Renovation because we get the parts you cannot see right first, the tanking, drainage and ventilation, before any tile goes on. That is what stops leaks and damp in an older CR4 house. One team covers plumbing, electrics, tiling and heating, all to standard, backed by our founder's 30+ years of bathrooms.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.