Bathroom Renovation Mayfair

GS Renovation creates bathrooms, en-suites and wet rooms across Mayfair, fitting them into W1's mansion blocks, converted flats and Georgian and Regency townhouses. We handle the waterproofing, drainage, tiling and finishes, making the most of the often awkward spaces found in period homes near Hyde Park and the West End.

In Mayfair, 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 Mayfair: 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 Mayfair 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 Mayfair

Fitting a new bathroom or en-suite into a Mayfair townhouse means working with solid walls, existing drainage runs and rooms that were never designed for modern plumbing. We tank and waterproof thoroughly before tiling, form falls correctly for wet rooms and walk-in showers, and add proper ventilation to protect the historic fabric from damp. Underfloor heating is often the neatest way to warm these tall, cool rooms.

Space in period W1 homes is frequently tight, so we design layouts that use every inch, tucking en-suites into former dressing rooms or under staircases and choosing fittings that suit the proportions. Drainage in a multi-storey townhouse needs careful planning to run new soil pipes discreetly through the structure. New circuits, and changes to circuits around the bath or shower, are notifiable under Part P, so a registered electrician certifies them or they are notified to building control as part of the works.

Housing in Mayfair

The stock in the Strand, St James & Mayfair statistical area runs to roughly 7,560 dwellings, 96% of them flats and 4% houses, built 52% before 1919, 5% between 1919 and 1939 and 41% after 1945. Where most homes are flats, a bathroom in a flat in Mayfair sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.

Adding a bathroom to a Mayfair flat through Westminster building control

An extra bathroom or en-suite in a Mayfair flat is a layout change rather than a straight swap. It means a new room carved out of a bedroom or corridor, which closes Westminster's building notice route, so the work goes in as a full plans application. The charge sits on Westminster's minor works line for the fit out of a bathroom or kitchen in one property, identical on either route, so the drawings decide the route rather than the fee. What those drawings must show is the waste run to the shared stack, the extract route to outside and how the new door keeps the escape hallway protected.

Timing follows from that. Westminster aims to reach a full plans decision within 5 weeks and warns it can take longer, and in Mayfair, where 96% of homes are flats, the freeholder may ask to see the approved drawings before granting the licence. Order long lead sanitaryware while the application is live, but hold the tiles and any stone until the shower tray position and its falls are confirmed. Moving a tray after approval means revising a drawing the district surveyor has already checked, and a stone order cut to the old layout is wasted.

Period bathroom design across Mayfair

A bathroom in a Mayfair townhouse can be traditional or contemporary, but it should sit comfortably within a period home. We fit everything from classic roll-top schemes with heritage-style brassware to sleek walk-in showers finished in large-format stone, tiling to a high standard throughout. Quality tanking beneath the surface is what keeps a beautiful bathroom watertight for years, and we never cut corners on it.

Many of Mayfair's finest homes are listed or in a Westminster conservation area, so we work sympathetically with original features and use appropriate materials where consent applies. Internal bathroom work does not need planning permission, though it is governed by building regulations. From concealed cisterns to underfloor heating and considered lighting, we manage the plumbing, electrics, tiling and decoration as one coordinated job.

• En-suite creation in bedrooms and loft rooms
• Shower pumps and pressure improvements where flow is poor
• Floor strengthening before large-format tiles or stone

VOA Council Tax stock of properties, March 2025, for the Strand, St James & Mayfair statistical area, which also covers St James's and the Strand. Counts rounded by the VOA.

If you are weighing up options for your Mayfair property, it is worth reading chimney breast removal in Mayfair, bathroom renovation across Westminster, bathroom fitting in London, bathroom renovation across London and Small Bathroom Ideas.

Trusted Bathroom Renovation in Mayfair

Bathrooms in Mayfair's period townhouses hinge on getting the waterproofing, drainage and ventilation right beneath a beautiful finish. GS Renovation handles the tanking, the pipework, the notifiable electrics through a registered electrician, and the tiling as one accountable job, making clever use of tight period spaces. With our founder's 30+ years on the tools, we deliver en-suites and wet rooms that stay watertight and look the part.

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.