Bathroom Renovation Clapham

GS Renovation fits bathrooms and en-suites across Clapham, working within the tight footprints of SW4's Victorian and Edwardian terraces. We handle waterproofing, drainage, tiling and heating in-house, turning cramped or dated rooms near the Common into properly finished, hard-wearing spaces.

In Clapham, 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 Clapham: 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 Clapham 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.

Waterproofing and wet rooms in Clapham

Bathrooms in older Clapham terraces are frequently squeezed into the rear closet wing or a boxed-in landing, where a hidden leak can quietly damage the period fabric below. We tank and waterproof properly before tiling, so wet rooms and walk-in showers stay watertight for the long term rather than failing a few years in and soaking the joists.

Getting the services right matters as much as the finish. We upgrade drainage to fall correctly, add proper ventilation to deal with condensation in these solid-wall rooms, and set out underfloor heating where the floor build-up allows. The tiling, sanitaryware and lighting then go in over a sound, well-drained base that will not give trouble later.

Housing in Clapham

Count the homes in Clapham and you get about 22,800: 34% built since 1945, 6% between the wars and 58% before 1919, with flats at 72% and houses at 28%. Where most homes are flats, a bathroom in a flat in Clapham sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.

A new shower room in a Clapham flat and what gets inspected

Lambeth's building control fee guide includes installation of a new WC, shower or utility as a charged item, which tells you that adding a shower room, rather than refitting the existing bathroom in place, is building regulations work. What gets inspected is what affects other people: drainage connected to the stack with the right falls, an extract fan ducted to outside, and the electrics near water. In a Clapham flat, the floor between your new shower and the home below matters as much as any of those, because it is where a mistake shows first.

72% of Clapham homes are flats, so a leak here tends to land in a neighbour's ceiling rather than your own. Where a shower tray becomes a level access wet floor, the floor has to be lowered between the joists or built up, and both change what the flat below hears. The lease may also require sound insulation to be kept or improved when a floor is replaced. For a Clapham flat above another home we recommend an acoustic layer under the new floor, and we pressure test the pipework before the tiles go on, while a fault can still be reached from above.

Space-saving layouts for SW4 period homes

Space is the constant challenge in an SW4 bathroom. The closet-wing rooms and narrow landings of Clapham terraces rarely offer much floor area, so we plan the layout carefully, using wall-hung units, walk-in showers and considered storage to make a small room feel usable rather than cramped, without wasting an inch of the footprint you have.

En-suites are a popular addition when we reconfigure the upper floors of a Clapham house, carving one out of a bedroom or a redundant box room. Bathroom work does not need planning permission, though new circuits and changes around the bath or shower are notifiable under building regulations, so the wiring and extract are certified by a registered electrician under Part P, or notified to building control, leaving you with paperwork that stands up when you sell.

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 Lambeth Council, and doing it without consent is a criminal offence.

• Notifiable bathroom electrics certified by a registered electrician under Part P
• En-suite creation in bedrooms and loft rooms
• Complete bathroom design and planning

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Clapham. Counts rounded by the VOA.

For the wider picture around bathroom renovation in Clapham, see chimney breast removal in Clapham, bathroom renovation across Lambeth, bathroom fitting in London, bathroom renovation anywhere in London and Small Bathroom Ideas.

Trusted Bathroom Renovation in Clapham

Clapham homeowners choose GS Renovation because we get the parts you cannot see right, tanking, drainage and ventilation, before the tiling ever goes on. One team handles the plumbing, electrics, heating and finish, we make the most of tight SW4 layouts, and our founder's 30+ years on the tools mean the bathroom lasts rather than leaks.

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.