Bathroom Renovation Knightsbridge

GS Renovation renovates bathrooms and en-suites across Knightsbridge, working within the period townhouses and mansion flats of SW7. We handle waterproofing, drainage, tiling, underfloor heating and the space planning that period homes and leasehold apartments both demand.

In Knightsbridge, 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 Knightsbridge: 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 Knightsbridge 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 Knightsbridge

A bathroom in a Knightsbridge townhouse or mansion flat has to be watertight before anything else, so we tank and waterproof the walls and floor properly, particularly in wet rooms and walk-in showers where water is not contained by a tray. Correct drainage falls and mechanical ventilation are designed in from the start, which matters in solid-walled period rooms and internal bathrooms where damp has nowhere easy to escape.

Over the top of a sound waterproofing layer we tile to a high standard, run underfloor heating for warmth and comfort, and set out the sanitaryware for a clean, considered finish. In an SW7 mansion flat we also respect the sound insulation between flats and the building management rules, coordinating with the managing agent, so a new bathroom does not create a nuisance for the neighbour below.

Housing in Knightsbridge

The stock in Knightsbridge runs to roughly 10,560 dwellings, 83% of them flats and 17% houses, built 66% before 1919, 19% between 1919 and 1939 and 15% after 1945. Where most homes are flats, a bathroom in a flat in Knightsbridge sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.

Old soil stacks and water pressure in Knightsbridge blocks

19% of homes in Knightsbridge were built between 1919 and 1939, and in a block of that age the soil stack serving your bathroom may be the original cast iron, carrying the waste of every flat above. Cast iron corrodes from the inside and the joints loosen, so the connection from a new bathroom into an old stack is where a leak starts. Before the design is fixed, ask the managing agent whether the stack has been surveyed with a camera and whether replacement is planned. If it is, timing your bathroom to follow it saves breaking into new tiles a year later.

Water pressure is the other shared question. 83% of homes in Knightsbridge are flats, and upper floors in a block can depend on tanks or booster pumps the freeholder controls. A shower designed for high flow may not get it. Water fittings rules restrict pumping straight off the mains, so a pump or a storage cylinder has to be designed in, and the lease may restrict plant inside the flat. We check the flow and pressure at the flat before choosing the shower, so the Knightsbridge bathroom performs as drawn.

Space-saving en-suites in Knightsbridge homes

Period townhouses in Knightsbridge were not built with today's bathrooms in mind, so fitting an en-suite often means working within a chimney recess, a landing corner or a slice taken from a bedroom. We plan space-saving layouts that make the most of tight footprints, choosing walk-in showers, wall-hung sanitaryware and concealed cisterns to keep the room feeling open despite the constraints of an older house.

In a mansion flat the picture is leasehold, so structural change is limited and moving soil pipes or drainage is rarely straightforward. We work within the freeholder's licence to alter and the building's management rules, planning the layout around the existing services where we can. Whether townhouse or apartment, new circuits and changes to circuits around the bath or shower are notifiable under Part P, so a registered electrician certifies the installation and we hand over a fully compliant SW7 bathroom.

• Niches, benches and recessed storage formed in the wet area
• Concealed cisterns, frames and wall-hung sanitaryware
• Wall and floor tiling in stone, porcelain or mosaic

VOA Council Tax stock of properties, March 2025, for Hans Town and Brompton. Counts rounded by the VOA.

When comparing bathroom renovation in Knightsbridge with other work, it helps to read chimney breast removal in Knightsbridge, bathroom renovation across Kensington and Chelsea, bathroom fitting in London, bathroom renovation anywhere in London and Bathroom Tile Ideas.

Trusted Bathroom Renovation in Knightsbridge

Knightsbridge homeowners choose GS Renovation for bathrooms because we get the fundamentals right, with proper tanking, drainage and ventilation before a single tile goes on. We plan clever layouts for tight period rooms, respect leasehold and building rules in mansion flats, and have the electrics certified by a registered electrician, 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.