Bathroom Renovation Brentford
Bathroom and wet-room refurbishment in Brentford, 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 throughout Brentford, from en-suites in riverside apartments to family bathrooms in TW8 terraces and warehouse conversions. We handle waterproofing, drainage, tiling, heating and ventilation to a proper standard, so your new Brentford bathroom performs as well as it looks and protects the flats and rooms around it.
In Brentford, 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 Brentford: 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 Brentford
Brentford range: choose above
How the job runs
- Free design visit at your Brentford 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.
Waterproofing bathrooms in Brentford flats
In Brentford's converted and new-build apartments, a bathroom sits above someone else's home, so getting the waterproofing right is not optional. We tank the walls and floor properly before tiling, form falls to the drainage, and test the installation so there is no risk of water reaching the flat below. Correct tanking and a well-designed wet room or walk-in shower are the difference between a bathroom that lasts and one that causes disputes with neighbours.
Ventilation and drainage need equal care in a flat. We install extraction that clears moisture rather than trapping it, run new waste to existing stacks correctly, and finish with tiling, underfloor heating and considered lighting. Any notifiable electrical work is certified by a registered electrician under Part P. Throughout, we coordinate with the managing agent on access and working hours so a bathroom refurbishment in a TW8 block goes smoothly for everyone in the building.
Housing in Brentford
Around 13,230 homes make up Brentford on the valuation list; 65% are flats and 35% houses, and 15% date from before 1919, 24% from between the wars and 61% from after 1945. Most homes here are flats, and a bathroom in a flat in Brentford sits over a neighbour's ceiling, so tanking comes first.
New bathrooms in Brentford: notice, inspection and the floor below
Hounslow says a building notice is usually used for smaller projects, and installing a new bathroom is one of the examples it gives. That covers a bathroom in a new position: a second bathroom in a Brentford house, or an en-suite carved out of a bedroom. Work can start 48 hours after giving notice, but further information can still be requested afterwards, so the drainage layout and the extract fan specification belong on paper before the first pipe goes in. Swapping fittings in the same room on the same connections is a smaller job.
65% of Brentford homes are flats, so a new bathroom here is more often above a neighbour's ceiling than above your own kitchen. Hounslow requires inspection requests with at least 1 working day's notice. Book the drainage visit for when the waste runs are tested and still exposed, and hold the tanking until it has happened. In a flat, the soil stack connection and the boxing through the floor are the details the inspector and the freeholder's surveyor both want to see, and both are hidden within days.
Space-saving bathrooms in Brentford terraces
Period terraces in Brentford often have awkward, dated bathrooms squeezed into tight footprints. We are practised at making the most of small spaces, planning layouts that fit a proper shower, basin and WC without feeling cramped, and adding an en-suite where the room allows. Wall-hung fittings, walk-in showers and clever storage all help a compact Brentford bathroom feel generous.
Behind the finish, the fundamentals still matter. We tank wet areas, upgrade drainage and ventilation, and can lay underfloor heating for warmth underfoot in a solid-floored terrace. Tiling is set out carefully so the finished room reads as considered rather than compromised, and the electrics are certified by a registered electrician under Part P. The result is a bathroom that suits the age of the house while working comfortably for a modern household.
- Concealed cisterns, frames and wall-hung sanitaryware
- Walk-in showers and wet-room installation
- Floor strengthening before large-format tiles or stone
VOA Council Tax stock of properties, March 2025, for Brentford Central, Brentford West & Osterley Park and Brentford East. Counts rounded by the VOA.
The GS Renovation Difference in Brentford
Brentford homeowners choose GS Renovation because a bathroom in a flat or terrace has to be watertight, well drained and properly ventilated, not just nicely tiled. We tank thoroughly, get the drainage and extraction right, have the electrics certified by a registered electrician, and coordinate with managing agents in TW8 blocks. Our founder's 30+ years of experience means your bathroom is built to last.
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
Really great job done in our bathroom to replace the shower head in the bathtub, and install a shower screen and caddy. We are very happy with the…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
FAQ
Frequently Asked Questions about Bathroom Renovation Brentford
Can you quote bathroom renovation for a TW8 property over the phone?
A phone quote for bathroom renovation at a TW8 property would be a figure that changes, so GS Renovation gives the range, £6,000 to £20,000 or more (indicative), and prices after a visit. What the job costs depends on what only a survey shows, because soil stack distance decides where a Brentford WC can go. Talk the scope through on 07472 424 226; the Brentford survey is free.
Do I need to tell my freeholder about a new bathroom in my Brentford flat?
A like-for-like bathroom refurbishment usually does not need planning permission or a freeholder's licence, but moving the bathroom or altering drainage often does, so check your lease. Because your flat sits above another home, thorough tanking and correct drainage are essential. We waterproof properly, coordinate access with the managing agent, and have notifiable electrical work certified by a registered electrician. 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 Hounslow Council, and doing it without consent is a criminal offence.
How long will I be without a bathroom in my Brentford flat?
A full refit takes 10 to 15 working days, and if it is your only bathroom, most of that time it is out of use. The WC is normally the last fitting removed and the first reconnected. Tanking needs drying time before tiling, so the middle of the programme cannot be squeezed.
Will a rainfall shower work with the hot water system in my Brentford flat?
It depends on the system. A combi boiler delivers a fixed flow rate, which a large rainfall head can outrun, especially if a kitchen tap is running at the same time. An unvented cylinder, found in some newer flats, gives strong pressure from store but can run out mid-shower. The available flow is measured at survey before any shower valve is chosen.
Where does the extractor in an internal Brentford bathroom vent to?
Outside, through a duct. Part F requires mechanical extraction ducted to outside, so a bathroom with no external wall needs a run through the ceiling void to an outside wall, or into a shared riser where the building was designed for one. The duct falls away from the fan and is insulated where it crosses cold space so condensation cannot run back. Routing through the building fabric needs the managing agent's agreement.
Can the WC be moved in a Brentford flat bathroom?
Only within reach of the soil stack, which in a block serves the flats above and below and stays put. A WC waste needs a steady fall, and with the pipe boxed across a slab floor, the pan can travel only as far as that fall allows. A pumped macerator is a fallback, and the lease consent covers any move.
Do en-suites for every bedroom in a Brentford house need planning permission?
The en-suites themselves do not. The use of the house might. Hounslow's borough-wide Article 4 Direction removing the right to change a dwellinghouse to a small HMO came into force on 4 September 2023. If the plan is to let rooms to sharers, a planning application comes before the bathrooms, because the layout, the number of rooms and the fire precautions follow from the permitted use. For a family home, the bathrooms are a building control matter only.
When does Hounslow issue the certificate for a new Brentford bathroom?
Once the work is completed and inspected. A bathroom that is finished but still waiting on its final visit has no certificate yet. Request that inspection as soon as the extract fan is commissioned and the electrics are certified, and keep the electrician's certificate with the building control one. A buyer's solicitor for a Brentford flat or house will ask for both when a bathroom has been added in a new position.
Can a Brentford bathroom go in the rear outrigger of an older terrace?
It can, and in older houses it often already is there. 15% of Brentford homes were built before 1919, and a bathroom at the back of a Victorian terrace tends to sit over the kitchen on joists sized for a bedroom. A cast iron or stone bath full of water is a concentrated load, so the structural engineer we appoint checks the joists before the bath position is fixed. The soil pipe runs down the rear wall, which keeps the WC close to it.
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