Bathroom Renovation Hayes
Bathroom and wet-room refurbishment in Hayes, 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 refits bathrooms across Hayes, from family bathrooms in 1930s semis and post-war houses to new en-suites carved out of larger bedrooms in UB3. We handle the waterproofing, drainage, tiling, heating and finishing so your new bathroom looks right and, just as importantly, stays dry for years.
In Hayes, 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 Hayes: 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 Hayes
Hayes range: choose above
How the job runs
- Free design visit at your Hayes 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 walk-in showers in Hayes
A wet room or a level-access walk-in shower is a popular upgrade in Hayes, but it only lasts if the waterproofing is done properly. We tank the floor and walls with a proper membrane system before a single tile goes on, form the falls so water runs to the drain, and set the pipework and waste to suit the interwar floor structure. Done right, the result is a clean, unbroken shower space that will not leak into the rooms below.
Ventilation and drainage matter just as much as the finish. The 1930s semis in UB3 were not built with modern bathrooms in mind, so we fit proper extraction to control moisture, upgrade the soil and waste runs where needed, and add underfloor heating to keep the room warm and the floor dry. Then we tile, install the sanitaryware and screens, and finish with the lighting so the whole room performs as well as it looks.
Housing in Hayes
Take the 16,650 or so homes the valuation list gives Hayes: 42% flats, 58% houses, 4% from before 1919, 44% interwar and 52% post-war. Semi-detached houses make up 30% of homes here, and a semi in Hayes can vent its bathroom through the flank.
When a new WC or shower in Hayes involves building control
A like for like bathroom refit in the same positions is not usually a building control job. Adding a fitting is different. Hillingdon charges a set total including VAT for installing a new WC, shower, bath or basin within an existing room, so a new sanitary fitting with new drainage is work to put through building control, unlike a straight swap. A shower added to a bedroom, a WC under the stairs or a basin in a box room in Hayes each brings new drainage, and often new ventilation, that the inspector wants to see before it is boxed in.
Make the application before the plumber starts, not after. The inspector checks the waste falls and connections while the floor is still open, and a sealed floor can mean lifting new tiles later. In a Hayes flat the stakes are higher, because 42% of homes here are flats and a new shower waste runs above a neighbour's ceiling. Test every new joint under pressure before boarding, and keep the access panel for the trap where it can actually be reached.
En-suites and space-saving layouts in Hayes
The bedrooms in a 1930s Hayes semi are usually large enough to give up a corner for an en-suite, and a small shower room next to the main bedroom adds real value and convenience. We plan these tight spaces carefully, using compact sanitaryware, walk-in showers and clever storage so nothing feels cramped. Where soil pipes and water need to reach an awkward spot, we work out the runs early so the layout actually works.
Family bathrooms in these interwar houses are often an odd shape, with a boxed-in cistern, a sloping ceiling over the stairs or a window in the wrong place. We reconfigure the layout to use every inch, sometimes moving the bath, basin and WC to a better arrangement. New circuits, and changes to circuits in the zones around the bath or shower, are notifiable under Part P, so the wiring is certified by a registered electrician, and we handle the extraction and the lighting correctly and leave you a room that is safe and properly finished.
- Wall and floor tiling in stone, porcelain or mosaic
- Shower pumps and pressure improvements where flow is poor
- Pressure and leak testing before any tiling starts
VOA Council Tax stock of properties, March 2025, for Hayes End, Hayes Town North, Hayes Town & Lake Farm and Hayes South. Counts rounded by the VOA.
Why Choose GS Renovation in Hayes
Hayes homeowners choose GS Renovation because a bathroom is as much about what you cannot see as the tiles on show. Our founder's 30+ years on the tools mean we get the tanking, drainage and ventilation right in these interwar homes, so the room stays dry and warm. One team handles the plumbing, electrics, tiling and finish, with a tidy site and a fixed, honest price.
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 Hayes
What drives the cost of bathroom renovation in a Hayes home?
Scope drives the price of bathroom renovation in Hayes first, condition second and access third, inside £6,000 to £20,000 or more (indicative). Scope is set by the regulations as much as the design: the work needs Part F extraction to outside, and Part P certification for any new circuit. GS Renovation shows that element separately, and the UB3 survey establishes all three before a figure is committed.
Can you fit an en-suite in the main bedroom of my Hayes semi?
Usually yes. The larger bedrooms in a 1930s Hayes semi often have enough room to take a compact en-suite in a corner. The main things to plan are the soil pipe and water runs and proper ventilation, which we work out before starting. With space-saving sanitaryware and a walk-in shower we can fit a smart en-suite without making the bedroom feel cramped.
How long is the bathroom out of action during a Hayes refit?
About 10 to 15 working days, and in a Hayes semi with a single bathroom that means no bath or shower for the whole period, so arrange access elsewhere. A temporary WC connection can often be kept for part of the job. The critical path inside that window is set by drying times: tanking must cure before tiling can start, and grout before sealing.
Can a cast iron or stone bath go upstairs in my Hayes semi?
Only once the floor has been checked, because a filled heavy bath with someone in it puts a concentrated load on interwar joists. The engineer may recommend a spreader board across several joists, extra joists, or placing the bath so its feet land near a supporting wall. Check the joist direction and any old notches before choosing the bath, not after it arrives.
What does electric underfloor heating need in a Hayes bathroom?
A circuit of its own, because Part P makes new bathroom wiring notifiable and a registered electrician has to sign it off. The heating mat is laid on insulation boards, resistance-tested, then tested again once tiled over, and its thermostat is mounted outside the wet zones, usually on the landing side. Allow for the added floor height where the bathroom meets the landing carpet in a UB3 semi.
Will a combi boiler cope with a second bathroom in my Hayes house?
Perhaps not. A combi heats water on demand, so two showers at once can leave both weak. Adding an en-suite to a Hayes semi is often the moment to move to a cylinder, which needs a cupboard and a sensible pipe route. Decide the hot water system before first fix, because the pipe sizes and positions follow that choice.
Do extra en-suites for letting rooms in a Hayes house need planning?
The en-suites do not, but the use can. Since Hillingdon's HMO direction, letting a house anywhere in the borough to 3 or more unrelated sharers needs planning permission as a change of use. If the bathrooms are being added so the house can be let to sharers, get that permission first. Fitting several en-suites without it risks spending on a layout the planning decision may not allow, and it cannot be let to that many sharers lawfully in the meantime.
How do interwar Hayes houses affect where a new bathroom can go?
44% of homes in Hayes were built between 1919 and 1939, and the upstairs bathroom in those houses usually sits over the kitchen at the back, close to the soil stack on the rear wall. Moving the bath or WC towards the front means a long waste run across joists that rarely point the right way. Keep the WC near the stack, put the basin or shower on the longer run, and check the old pipework for lead before connecting to it.
What finishes a notifiable bathroom job with Hillingdon in Hayes?
Two documents, in order. Hillingdon wants its LABC Regulation 16(4A) Completion Notice form back within 5 days of the bathroom being finished. The inspector then makes a final check, and once Hillingdon is satisfied the work complies, it issues the completion certificate without a further charge. Keep it with the electrician's certificate for any new circuit, because a buyer asks for both where a bathroom has clearly been added.
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