Bathroom Renovation Hillingdon
Bathroom and wet-room refurbishment in Hillingdon, tanked, plumbed and tiled by one team.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £6,000 to £20,000+
- 10 to 15 working days on site
- Free design visit, itemised quote
GS Renovation renovates bathrooms across Hillingdon, working in the borough's interwar semis and post-war family homes throughout Ruislip, Uxbridge and Hayes. We handle full waterproofing, wet rooms, en-suites and space-saving layouts, managing the drainage, tiling, electrics and heating as one properly sequenced job.
In Hillingdon, 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 Hillingdon: we carry the tanking, plumbing and tiling as one contract, with the electrics certified by a registered electrician.
Price guide
| Work | Indicative London range |
|---|---|
| Bathroom renovation, full refit | £6,000 to £20,000+ |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Bathroom Renovation Cost.
Quick estimate for Hillingdon
Hillingdon range: choose above
How the job runs
- Free design visit at your Hillingdon home and an itemised quote.
- Strip-out, then first-fix plumbing and electrics.
- Tanking to the wet areas, then tiling.
- Sanitaryware and second fix, with notifiable electrics certified by a registered electrician. Typically 10 to 15 working days on site.
Wet rooms and tanking in Hillingdon
A lasting bathroom starts with what you cannot see. Before any tile goes on, we tank and waterproof the walls and floor, which matters especially in the timber upper floors common to Hillingdon's 1930s semis. For wet rooms and walk-in showers we form the falls correctly, fit the right drainage and tanking membrane, and make sure ventilation is adequate so moisture is extracted rather than left to cause damp.
Get the waterproofing and drainage right and the finish lasts for decades. We tile to a high standard, fit underfloor heating where wanted, and choose layouts that work with the existing soil pipe and joist runs rather than fighting them. Across Ruislip and Uxbridge we upgrade tired 1930s bathrooms into warm, modern wet rooms and shower rooms that are built to cope with daily family use.
Housing in Hillingdon
Count the homes in Hillingdon and you get about 118,240: 59% built since 1945, 37% between the wars and 4% before 1919, with flats at 34% and houses at 66%. A semi in Hillingdon can vent its bathroom through the flank, and 27% of homes here are semi-detached.
Adding a bathroom in Hillingdon counts as a building control item
Hillingdon's building control fee table has a line of its own for installing a new WC, shower, bath or basin within an existing room. That tells you something useful: a new en-suite carved out of a bedroom in a Hillingdon house is building control work, not only plumbing. The inspector looks at the drainage connection and the ventilation to outside. Include the soil route in the application from the start, because a waste that cannot fall to the stack forces the room to move, and moving it after the stud walls are up wastes the first fix.
In a Hillingdon flat the same job has a neighbour underneath. With 34% of homes in the borough being flats, a bathroom moved or added over someone else's ceiling will normally need the freeholder's consent under the lease. The tanking and the flood test then protect the owner below as much as you. Agree the waterproofing method in writing before the floor is lifted. Where the new room needs a pumped waste rather than a gravity one, confirm the lease allows it and plan an access panel for servicing, since a pump that fails can flood the same ceiling.
En-suites and small bathrooms in Hillingdon
Many Hillingdon interwar homes have one family bathroom and a boxroom crying out for an en-suite. We are skilled at fitting practical shower rooms into tight spaces, using compact sanitaryware, sliding or pivot doors and clever layouts to make small rooms feel generous. Adding an en-suite to a main bedroom is a popular upgrade in these three and four bedroom semis, and it adds real value.
New en-suites bring drainage and ventilation challenges, since you are often adding a bathroom where none existed. We plan the soil connection, run concealed pipework and fit proper extraction to protect the structure of a 1930s house. New circuits and changes around the bath or shower are notifiable under Part P and certified by a registered electrician, with all wiring installed to the required zones, so the finished space in your Hayes or Northwood home is safe, warm and correctly signed off.
- Concealed cisterns, frames and wall-hung sanitaryware
- Drainage falls set to the gully in wet rooms
- En-suite creation in bedrooms and loft rooms
VOA Council Tax stock of properties, March 2025, for all 32 statistical areas in Hillingdon. Counts rounded by the VOA.
Why Choose GS Renovation in Hillingdon
GS Renovation is trusted with Hillingdon bathrooms because we treat waterproofing and drainage as seriously as the tiling and the fittings. One team handles the plumbing, the electrics (certified by a registered electrician), the tanking, heating and finish, so nothing is missed behind the walls. With our founder's 30+ years on the tools, we build bathrooms and wet rooms that stay watertight and warm for years.
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
George is a very hard working builder, and has done a fantastic job on replacing my Bathroom. His attention to detail was great and I wouldn't…
The kitchen has been fitted to the high standard. Saaid was polite, professional, tidy, he pays attention to a little details that make huge…
FAQ
Frequently Asked Questions about Bathroom Renovation Hillingdon
Does the cost of bathroom renovation rise in a post-war suburban Hillingdon property?
The cost of bathroom renovation in a post-war suburban Hillingdon property can rise a little within £6,000 to £20,000 or more (indicative), mostly in making good rather than the structural work. Making good plaster, skirtings and floor finishes takes longer than the structural work at a UB8 address. GS Renovation allows for that in the quotation, and for the fact that soil stack distance decides where a Hillingdon WC can go.
Can you fit an en-suite into a bedroom in my Ruislip 1930s semi?
Usually, yes. Many Hillingdon semis have space in a main bedroom or boxroom for a compact en-suite. The main considerations are drainage, connecting to the existing soil pipe, and ventilation to protect the timber structure. We use space-saving sanitaryware and proper tanking, and all bathroom electrics are installed to the correct zones and certified by a registered electrician under Part P. No planning permission is needed for internal work. 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 Hillingdon Council, and doing it without consent is a criminal offence.
Can my Hillingdon bathroom become a wet room on a timber floor?
Yes, with the floor built for it. The joists are checked, the deck is replaced with a stiff board and the fall to the drain is formed. The joists decide where that drain can sit, because the waste has to run along them to the stack. The whole floor and lower walls are tanked before tiling.
Will a heavy stone bath suit the floor in my Hillingdon semi?
Check first. Filled and occupied, a solid stone tub puts its whole weight through a small patch of floor, and interwar joists have often been notched by earlier plumbers. The joist size, span and direction are checked, and where needed the floor is strengthened before the bath is positioned.
How long is a Hillingdon family without its main bathroom?
Typically 10 to 15 working days. Strip-out and first fix take the first few, then the waste falls are set before the tray, tanking before tiling, and fitting and sealing at the end. If there is no second WC, we agree a temporary toilet connection at the end of the day.
Should I swap the hot water cylinder for a combi when renovating my Hillingdon bathroom?
Think about how many taps run at once. A combi heats on demand, so a shower and a bath together can struggle; a cylinder stores hot water for both. Decide before first fix, because the choice changes the pipework and whether you gain back a cupboard.
Where does the soil pipe go for a new en-suite in a Hillingdon conservation area?
Inside, where possible. Within its conservation areas Hillingdon says altering a building is likely to need planning permission, and a new soil pipe on a front or side elevation is a change everyone sees. Route it internally in a boxed duct down to the ground floor, or place the en-suite where it can join the existing stack at the rear. Where an external pipe cannot be avoided, keep it to the rear wall and match the colour of the existing rainwater goods.
Do en-suites for lodgers in a Hillingdon house raise planning questions?
They can. Converting a dwelling to an HMO with 3 or more unrelated people sharing now needs planning permission in every part of Hillingdon. Adding en-suites to each bedroom is a sign that a house is being set up for sharers, so if that is the plan, settle the planning position before the bathrooms are built. If the house stays a single household, the bathroom work is normally a building control and plumbing matter.
Should a Hillingdon bathroom renovation go in on a building notice or full plans?
Match the route to the risk. Hillingdon does not issue plans approval on a building notice and strongly recommends it only where the builder can successfully complete the works. A new basin or WC in an existing room with a short, known waste route suits that route. A bathroom that needs strengthened joists or a new floor structure is different, because a Hillingdon full plans application requires detailed plans and structural calculations, and that check is worth having before tiles go down.
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