Bathroom Renovation Wembley
Bathroom and wet-room refurbishment in Wembley, 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 Wembley, from family bathrooms to en-suites and walk-in wet rooms in HA9's flats and interwar semis. We get the waterproofing, drainage and ventilation right first, then build a durable, well-tiled bathroom that fits the sometimes awkward proportions of these homes.
In Wembley, 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 Wembley: 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.
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How the job runs
- Free design visit at your Wembley 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 en-suites in Wembley homes
Most Wembley bathrooms are in flats, many of them in the blocks around Wembley Park, where the room sits over another home on a concrete slab, the soil stack is fixed and the freeholder's consent comes before any layout change. In the interwar semis on the streets behind, the bathroom usually sits in a compact rear room or above the stairs over a timber floor. We create walk-in showers, full wet rooms and neat en-suites carved from a corner of a bedroom, planning the drainage falls and pipe runs to suit the existing structure. Proper tanking and waterproofing go in before a single tile is laid, because a leak in a 1930s timber floor causes far more damage than the job to prevent it.
Ventilation is the detail many HA9 bathroom refits ignore and later regret. We install extraction that actually clears moisture, protecting your new plaster and tiling from damp and mould. Underfloor heating, recessed lighting, quality tiling and space-saving sanitaryware all follow. New circuits, and changes to circuits around the bath or shower, are notifiable under Part P, so that work is certified by a registered electrician or notified to building control rather than left as an afterthought.
Housing in Wembley
Wembley has around 17,140 homes on the Council Tax list: 63% post-war, 25% interwar and 12% predate 1919, with 71% flats and 29% houses. A bathroom in a flat in Wembley sits over a neighbour's ceiling, so tanking comes first, which matters here because most homes are flats.
A new bathroom in a Wembley flat and the neighbour below
71% of Wembley's homes are flats, so a new bathroom here very often sits above someone else's home. The order of priorities follows from that. The waterproofing under a level shower, the fall of the waste and the seals where pipes pass through the floor matter more than the finish, because a slow leak shows first in the ceiling below. In a concrete-floored block the shower tray height is decided by how much fall the waste needs above the slab. Settle that before choosing a walk-in design, and agree access with the owner below in case a ceiling has to open.
In Brent a building notice applies to residential use only and covers smaller projects such as creating a bathroom. A new bathroom in Wembley, as opposed to a refit in the same place, therefore sits inside building control, and where Brent's own service is used, work on a notice can start once it is accepted, usually within 48 hours. The inspector looks at the drainage connection and the extract ventilation. Any new electrical circuit is certified by a registered electrician or notified. Keep the extract route in the drawings from the start, because a fan with nowhere to discharge is what holds up sign-off.
Space-saving bathrooms in interwar HA9 houses
The original bathrooms in Wembley's 1930s semis were rarely generous, so clever use of every centimetre is what separates a good refit from a frustrating one. We plan layouts that fit a proper shower, basin and WC without the room feeling cramped, using wall-hung units, slimline cisterns and the right tiling choices to make a small space feel larger and lighter. Where a family needs a second bathroom, the generous plots often allow an en-suite over the extension.
Every element is coordinated by one team. New drainage tied cleanly into the existing soil stack, replumbed hot and cold feeds, tanked wet areas, tiling to walls and floor, heating and lighting. We protect the landing and stairs while working and clear up daily, because a bathroom refit in an occupied HA9 home should not take over the whole house. The finished room is watertight, warm and built to handle daily family use for years.
- Freestanding and built-in bath installation
- Concealed cisterns, frames and wall-hung sanitaryware
- Grout, silicone and trim detailing at completion
VOA Council Tax stock of properties, March 2025, for Wembley North, Wembley West, Wembley East and Wembley Park. Counts rounded by the VOA.
Trusted Bathroom Renovation in Wembley
Wembley homeowners choose GS Renovation because we treat waterproofing, drainage and ventilation as the foundation of a lasting bathroom, not an afterthought. With our founder's 30+ years on the tools, we make small interwar bathrooms work harder, have the notifiable electrics certified by a registered electrician, and finish to a standard that stands up to daily family use in your HA9 home.
Reviewed jobs near Wembley
1 MyBuilder review from Wembley, with each customer's own job title:
- Install new worktop, Wembley, 10 Jul 2024 (5 out of 5)
Read all 31 on our reviews page.
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
George was a great find. The job required re-plastering the walls before fitting acrylic panels. He also re-plumbed the shower waste under the solid…
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 Wembley
How do you price bathroom renovation in Wembley?
Pricing bathroom renovation for a Wembley property starts with an HA9 survey and ends with a written figure inside £6,000 to £20,000 or more (indicative). The key physical check comes first: soil stack distance decides where a Wembley WC can go. The quotation then splits into structure, services and finishes, with building regulations compliance for any new drainage, extraction or notifiable electrics shown separately.
Can you fit a wet room in the small bathroom of my Wembley semi?
Usually, yes. The compact bathrooms in HA9 interwar semis suit a walk-in wet room well, provided we get the drainage falls, tanking and ventilation right for the existing floor structure. We waterproof thoroughly before tiling, plan a space-saving layout, and have the notifiable bathroom electrics certified by a registered electrician under Part P. The result is a watertight, low-maintenance space that feels larger than the original room.
How long will I be without a bathroom in my Wembley home?
Budget 10 to 15 working days from the first tile coming off to the last seal going on. In a flat, which is what 71% of Wembley's homes are, that bathroom is usually the only one, so ask for the WC to go back on a temporary connection once first-fix plumbing is done. Tanking membranes and wet room screeds need drying time before tiling, and rushing that stage is where leaks start.
Can I add a second bathroom in the loft of my Wembley house?
Usually, provided the new waste can drop to the soil stack with a steady fall, which is easiest when the loft room sits directly above the existing bathroom. Water is the other test: a combi or unvented cylinder can feed a loft shower at decent pressure, while a gravity tank in the same loft cannot push water upwards to it without a pump. Check both before planning the layout.
Can I have sockets or a heated mirror in my Wembley bathroom?
Yes, within the zone rules around the bath and shower. A heated mirror or fan must carry the right rating for where it hangs, a shaver socket to the proper standard is fine, and ordinary sockets have to sit well clear of the wet area. Lights and switches follow the same logic. A new circuit, or a change to a circuit in those zones, is notifiable electrical work, so the installer issues a Part P certificate.
What needs to be ready before electric underfloor heating goes into my Wembley bathroom?
Three things: a spare way on the consumer unit for a dedicated circuit, a flat and rigid base, and insulation board below the mat. On a concrete slab, as in many purpose-built blocks, the board stops heat soaking downwards; on joists, the floor is overboarded first so tiles do not crack. The mat is resistance tested before and after tiling, and the new circuit is notified under Part P.
Is a new en-suite a separate building control item in Wembley?
Yes. Brent's building regulation charges guide lists installing a new bathroom, toilet, en-suite or kitchen as its own item at the full charge, under LB Brent Charges Scheme No 13, effective from 1 January 2022. Name the en-suite on the application, so its drainage is inspected. Check the scheme in force on the application date, as a newer one may apply.
Can a pre-1919 Wembley house take a heavy freestanding bath upstairs?
Sometimes, once the floor is checked. Only 12% of Wembley's homes were built before 1919, and joists of that age have often been notched by earlier plumbing. A filled stone or cast iron bath puts a heavy load on a small area. The structural engineer we appoint checks the joist size, span and damage, and may specify extra joists or a spreader before the bath goes in.
Can a bathroom be added to a Wembley semi for a lodger or sharers?
The bathroom is usually a building control matter only, but the use may not be. Brent's article 4 direction requires planning permission for change of use from dwellings (C3) to small HMOs (C4), and it took effect on 1 November 2022. If the extra bathroom is part of letting to three to six unrelated sharers, get that permission first. A single lodger in a family home is a different case.
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