Bathroom Renovation Coulsdon

GS Renovation renovates bathrooms across Coulsdon, working in the 1930s semis, post-war houses and bungalows of CR5, where the original bathrooms were often small and awkwardly placed. We deliver fully waterproofed wet rooms, walk-in showers and en-suites finished to a lasting standard.

In Coulsdon, 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 Coulsdon: 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 Coulsdon 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 waterproofing in Coulsdon

A bathroom only lasts if the water stays where it should, so every Coulsdon bathroom we build is properly tanked before a single tile goes on. We apply a continuous waterproof membrane across the floor and up the walls in the wet zones, which matters especially in a walk-in shower or a full wet room where water reaches surfaces a shower screen would normally protect.

Older houses around CR5 were not plumbed for today's showers, so we upgrade the drainage and the ventilation to match. Falls are set so water runs to the drain, waste pipes are routed to discharge correctly, and extraction is sized to clear the moisture that otherwise rots timber and blackens grout. Underfloor heating can be laid beneath the tiles to keep the floor warm and dry.

Housing in Coulsdon

Coulsdon counts roughly 7,540 homes for Council Tax; 8% are older than 1919, 30% interwar and 62% post-war, with 27% flats and 73% houses. A semi in Coulsdon can vent its bathroom through the flank, and 26% of homes here are semi-detached.

New bathroom or refurbishment: where Croydon draws the line in Coulsdon

Croydon draws a clear line for bathrooms. It lists installing a new bathroom among the minor works a building notice is aimed at, and it states that building control approval is not needed for refurbishing an existing bathroom or toilet. In a Coulsdon semi, replacing the suite, tiles and shower in the same room is the second kind of job. Carving an en suite out of a bedroom, or adding a shower room downstairs, is the first, so the notice goes in before the drainage is laid, and the new waste and ventilation are inspected.

That distinction shapes the design. A new bathroom has to show that its waste reaches the drain with a proper fall and that the room is ventilated to the current standard, and those two tests decide where an en suite can go in a Coulsdon house. A bedroom over the kitchen, close to the existing soil stack, is the easy case. One at the front of the house, far from the stack, may need a new stack on an outside wall, or a macerator, which is accepted only where another toilet in the house drains by gravity.

Space-saving layouts for Coulsdon houses

Bathrooms in Coulsdon's 1930s semis and post-war houses are frequently short on space, so the layout has to be planned carefully. We reset the suite to free up floor area, swap a bulky bath for a walk-in shower where that suits the household, and use wall-hung basins and concealed cisterns to make a small room feel larger. Every centimetre is worked out before the first fixing goes in.

Creating an en-suite off a main bedroom is a popular way to add a second bathroom in these houses, and we plan the drainage runs and ventilation so it works reliably. New circuits and circuit changes near the bath or shower are notifiable under Part P, and must respect the zones around water, so all wiring, extraction and lighting is installed and certified correctly. We tile, seal and finish to a standard that holds up to daily use.

• Notifiable bathroom electrics certified by a registered electrician under Part P
• Ventilation and extraction ducted to outside
• Underfloor heating and heated towel rails

VOA Council Tax stock of properties, March 2025, for Coulsdon and Old Coulsdon. Counts rounded by the VOA.

If this is your first project in Coulsdon, these are worth a look: chimney breast removal in Coulsdon, bathroom renovation across Croydon, bathroom fitting in London, bathroom renovation across London and Tiling Cost.

The GS Renovation Difference in Coulsdon

Coulsdon owners choose GS Renovation because we get the parts you cannot see right, the tanking, the drainage and the ventilation, before we make the room look good. One team handles plumbing, electrics, tiling and heating, so there is nobody to chase. Our founder's 30+ years on the tools means a bathroom that stays watertight for years.

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.