Bathroom Renovation Balham

GS Renovation fits bathrooms and en-suites throughout Balham's Victorian and Edwardian terraces and period conversions. In SW12 these are often tight, awkward spaces carved from a closet wing or a spare bedroom, so waterproofing and clever layouts matter. We deliver watertight, well-ventilated bathrooms built to last.

In Balham, 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 Balham: 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 Balham 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 bathrooms in Balham period homes

Bathrooms in Balham's terraces frequently sit in the rear closet wing or over timber upper floors, where getting the waterproofing right is everything. We fully tank walls and floors before tiling, pay close attention to drainage falls and traps, and make sure ventilation is adequate so that the damp and condensation these older, solid-walled houses are prone to do not take hold behind a new finish.

Wet rooms and level-access walk-in showers are popular in SW12, but they demand proper tanking and a correctly formed drainage gradient to work over a suspended floor. We build up the substrate, install the falls, tank the whole zone and only then tile, so the finished room is genuinely watertight. Underfloor heating can be added at this stage to keep the space warm and to help period bathrooms dry quickly.

Housing in Balham

About 7,240 homes are listed for Balham, and the mix is 45% houses to 55% flats, with 24% built after 1945, 8% in 1919 to 1939 and 68% earlier. Since most homes here are flats, a bathroom in a flat in Balham sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.

A new bathroom over another flat in a Balham conversion

55% of Balham's homes are flats, and in a converted terrace a bathroom moved to a new room can end up above someone else's ceiling. Two things follow. The waste has to reach the shared stack with a steady fall across joists that also hold up the flat below, and a leak becomes a neighbour's problem the same day. So the floor build-up is decided first: the tanking, a tray or a formed floor, and access panels to every joint that can be reached without lifting tiles.

Moving a bathroom is building regulations work because of the new drainage and the extract. Where the job is outside Wandsworth's fixed tables, the charge is set by the cost of the work, as a single building notice charge or as a plan charge plus an inspection charge, both including VAT. In a flat, full plans also gives the freeholder and the owner below an approved drawing of the new waste route. Ask the inspector to see that run before the floor is closed, because in a Balham conversion it is the pipe the flat below will ask about if a stain ever appears.

Space-saving en-suites in SW12 terraces

Space is the constant challenge in Balham bathrooms. Carving an en-suite from a bedroom corner, or fitting a family bathroom into the narrow closet wing, calls for careful planning of the layout, the door swing and where the soil pipe can run. We plan sanitaryware, storage and shower positions to make a small period footprint feel usable rather than cramped, using wall-hung fittings and recessed niches to reclaim every inch.

Drainage and ventilation drive what is possible in these older houses, so we work out the pipe runs and extraction early, before the layout is fixed. Tiling, underfloor heating and considered lighting then finish the room. A bathroom renovation like this does not need planning permission, though new circuits and circuit changes near the bath or shower are notifiable under Part P, and a registered electrician certifies that work, or it is notified to building control, on every Balham job.

• Floor strengthening before large-format tiles or stone
• Ventilation and extraction ducted to outside
• Concealed cisterns, frames and wall-hung sanitaryware

VOA Council Tax stock of properties, March 2025, for Balham and Nightingale Lane. Counts rounded by the VOA.

Useful next reading for a bathroom renovation project in Balham: chimney breast removal in Balham, bathroom renovation across Wandsworth, bathroom fitting in London, how we handle bathroom renovation across London and Adding a Downstairs Toilet.

The GS Renovation Difference in Balham

Balham homeowners choose GS Renovation because we treat waterproofing and layout as the heart of a bathroom, not an afterthought. We tank properly, set correct drainage falls, plan ventilation for these damp-prone period houses and make the most of tight SW12 footprints. One team delivers the tiling, heating and finish, all backed by our founder's 30+ years on the tools.

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.