Bathroom Renovation Wandsworth

GS Renovation refits bathrooms across Wandsworth, working with the compact layouts typical of the borough's mansion blocks and period flats in SW12, SW17 and SW18. We tank, waterproof and fit wet rooms, en-suites and family bathrooms, paying close attention to drainage, ventilation and the sound insulation that flats above and below demand.

In Wandsworth, 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 Wandsworth: 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 Wandsworth 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 Wandsworth flats

In a Wandsworth mansion flat there is always a home below, so waterproofing is where a bathroom project stands or falls. We fully tank the walls and floor before tiling, form the falls to the drain on wet rooms and walk-in showers, and take extra care with sound insulation and pipe boxing to keep noise from carrying between flats. Getting this right protects both your home and the leaseholder beneath you.

Drainage and ventilation need proper thought in these SW11 and SW18 blocks, where soil stacks and extract routes are often fixed. We plan the layout around the existing services, upgrade the extraction to clear moisture and prevent damp, and coordinate with the managing agent where communal stacks are involved. The result is a bathroom that is watertight, well ventilated and finished to a standard that suits the building.

Housing in Wandsworth

On the valuation list Wandsworth counts about 157,900 homes, 72% flats and 28% houses; 43% predate 1919, 7% are interwar and 49% post-war. Since most homes here are flats, a bathroom in a flat in Wandsworth sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.

New soil pipes and vents on a Wandsworth converted house

43% of homes in Wandsworth were built before 1919, and where a flat is one floor of a house that old, adding a second bathroom or moving one often needs a new soil pipe or vent. In a converted house the easiest route is frequently down the outside of the rear wall. That is where the planning position bites. Wandsworth's conservation area FAQ gives flats, and houses divided into flats, no permitted development rights. A new external soil pipe, a vent through the roof or a fan grille on the facade is each an external change that, on Wandsworth's reading, needs an application, and the freeholder's consent as well.

The alternative is to keep everything inside. A soil pipe boxed through a cupboard or the corner of a bedroom to reach the existing stack avoids planning, but it costs floor space and needs an acoustic wrap where it passes a neighbour's room. An air admittance valve can sometimes replace an external vent, if building control accepts it for that run. We draw both routes at survey in Wandsworth, with the falls marked, so you choose between an application and a boxed corner knowing what each one means for the programme.

Space-saving bathrooms in Wandsworth period homes

Period flats around Balham and Tooting rarely offer a generous bathroom, so clever planning matters. We reconfigure tight rooms to fit a walk-in shower, a wall-hung basin and concealed cistern, freeing up floor space and light. Where an en-suite is wanted off a main bedroom, we find the drainage route first and design the layout around it rather than forcing fixtures where the pipework cannot reach.

Underfloor heating warms the floor without taking wall space, and considered tiling and lighting make a small room feel larger. Notifiable electrical work is certified by a registered electrician under Part P, or notified to building control, and we handle the tiling, plumbing and finishing in-house. Because bathrooms are internal work, no planning permission is needed, so the focus stays on a durable, watertight and comfortable result built to fit your flat.

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

• Complete bathroom design and planning
• Walk-in showers and wet-room installation
• Notifiable bathroom electrics certified by a registered electrician under Part P

VOA Council Tax stock of properties, March 2025, for all 38 statistical areas in Wandsworth. Counts rounded by the VOA.

People planning bathroom renovation in Wandsworth may also want chimney breast removal in Wandsworth, our Wandsworth area guide, bathroom fitting in London, our London bathroom renovation page and Bathroom Tile Ideas.

Trusted Bathroom Renovation in Wandsworth

A Wandsworth bathroom sits above someone else's ceiling, so waterproofing, drainage and sound insulation are not optional extras. GS Renovation tanks properly, plans around fixed soil stacks and coordinates with managing agents in leasehold blocks. With our founder's 30+ years on the tools, you get a watertight, well-ventilated bathroom, electrics certified by a registered electrician and a tidy install in your occupied home.

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.