Bathroom Renovation Barnes
Bathroom and wet-room refurbishment in Barnes, 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 fits bathrooms and en-suites across Barnes, working within the tight, awkward spaces typical of SW13's bay-fronted Victorian and Edwardian terraces and period cottages. We handle the waterproofing, drainage, tiling, heating and finish in one go, turning dated or cramped bathrooms into rooms that work.
In Barnes, 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 Barnes: 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 Barnes
Barnes range: choose above
How the job runs
- Free design visit at your Barnes 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 Barnes
A wet room only lasts if the waterproofing is done properly, and in a Barnes terrace with timber suspended floors that matters even more. We tank the whole area with a bonded membrane behind the tiling, form the falls to the drain, and make sure the shower cannot find its way into the joists below. Walk-in showers suit the narrower bathrooms of an SW13 home, giving a clean, open feel without a bulky enclosure.
Getting waste and ventilation right is half the job in a period bathroom. We reroute drainage to fall correctly, upgrade extraction to clear moisture from a room with little natural airflow, and often add underfloor heating so tiled floors are warm underfoot and dry quickly. Tiling is set out to suit the proportions of the room, and everything is finished to a standard that copes with daily family use in a Barnes home.
Housing in Barnes
Of the 9,740 homes the valuation list records in Barnes, 51% were built before 1919, 17% between the wars and 31% since 1945; 48% are flats and 52% are houses. Terraced houses make up 33% of homes here, and a terrace bathroom in Barnes vents front, back or up, never into a party wall.
Bathroom work in a Barnes flat or pre-1919 house
Richmond advises a Building Notice only for very simple work, and installing a bathroom is one of the examples it gives. For a straightforward Barnes bathroom that is the natural route, and once the notice is submitted there is only a 48 hours wait before starting. What makes a bathroom less simple is what sits beneath it. 48% of homes in Barnes are flats, and a new bathroom above another flat puts a wet floor over a neighbour's ceiling, so the lease, the freeholder and the waste route to a shared stack all come into the plan early.
In a Barnes house built before 1919, and 51% of homes here were, the bathroom can sit on joists notched over decades for pipe runs. Lifting the floor is the moment to see them. Where joists are weak the structural engineer we appoint sizes a repair, which turns a bathroom refit into a simple structural alteration as well. That is still on the list Richmond gives for a Building Notice, but the repair detail should be agreed before the boards go back and the tanking goes down.
En-suites and space-saving layouts in Barnes
Barnes terraces rarely offer generous bathrooms, so clever planning counts. We carve en-suites out of a corner of a bedroom or the space over the stairs, choose compact sanitaryware, and use wall-hung units and recessed niches to keep floor area free. Sliding doors, concealed cisterns and considered lighting all help a small SW13 bathroom feel bigger. The aim is a room that is practical for a busy household yet still feels calm.
A new bathroom inside the house does not need planning permission, and most Barnes projects run straight from design to install. We manage the lot, moving pipework and waste, adding the extraction, running the electrics and fitting underfloor heating, then tiling and finishing. New bathroom wiring is notifiable under Part P and certified by a registered electrician. Working in an occupied home, we protect the rest of the house and keep to a clear, agreed timetable.
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 Richmond Council, and doing it without consent is a criminal offence.
- Underfloor heating and heated towel rails
- Drainage falls set to the gully in wet rooms
- Full plumbing, drainage and waterproofing (tanking)
VOA Council Tax stock of properties, March 2025, for North Barnes and Mortlake & South Barnes. Counts rounded by the VOA.
The GS Renovation Difference in Barnes
Barnes homeowners choose GS Renovation for bathrooms because the parts you cannot see, the tanking, the falls and the ventilation, are done right, not just the tiles on top. We work confidently in the tight spaces of SW13 terraces, manage every trade, and have the electrics certified by a registered electrician. With our founder's 30+ years on the tools, your bathroom is built to stay watertight.
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…
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 Barnes
What is the going rate for bathroom renovation around Barnes?
An average rate is where bathroom renovation quotations in Barnes go wrong; the market range is £6,000 to £20,000 or more (indicative), but what decides the figure is the structure, access at SW13 and reinstatement, and the approvals (Part F extraction to outside, and Part P certification for any new circuit), none of which appear in an average. GS Renovation itemises so the total can be traced to real work.
Can you fit an en-suite into my Barnes Victorian terrace?
Yes. In Barnes we often create en-suites by borrowing a corner of a bedroom or the awkward space over the stairs, using compact, wall-hung fittings to save room. It needs full tanking, proper drainage falls and good extraction, especially in a period house with timber floors. No planning permission is required for an internal en-suite, though the new wiring is certified by a registered electrician under Part P. We handle the whole job as one team.
How long will we be without our only bathroom in Barnes?
Allow 10 to 15 working days for a full refit, with the room unusable for most of it. Strip-out, first fix, tanking, tiling and fitting run in that order, and the shower stays off until grout and sealant cure. In a Barnes house with a single bathroom, planning a short stay elsewhere or a temporary arrangement is sensible.
Can the toilet move across the room in my Barnes bathroom?
It can travel only so far before its pipe loses the gradient back to the stack. A toilet outlet is wide and needs a steady gradient, so in a period Barnes house the joist direction and the stack position, often on a rear wall, decide what is realistic. If the run is too long or crosses joists, a macerator is the fallback, though gravity is always preferred.
Is tiling over a timber floor in a Barnes bathroom a leak risk?
It is if the floor moves. Suspended timber flexes, so boards are stiffened or overlaid with tile backer first, then the area is tanked before tiling. For a walk-in shower the falls are formed before any of that. Skip the stiffening in an older SW13 house and grout cracks, water finds a way through, and the ceiling below shows it.
Will a new shower work with the hot water system in my Barnes flat?
That hinges on whether you have a combi or a cylinder. A combi feeds the shower at mains pressure but shares its flow between outlets; a gravity cylinder in a converted period flat can give weak pressure and need a pump. Measuring flow at survey settles the valve choice before walls close, since changing it after tiling means lifting tiles.
When is a Full Plans application worth it for a Barnes bathroom?
When the bathroom is not simple. In Richmond a Full Plans application and a Building Notice application cost exactly the same, so the only trade is time against certainty. A like-for-like refit suits a Building Notice. A bathroom moved over another flat, a wet room that needs the floor structure altered to form the falls, or a pumped waste on a long run is better approved as drawings first. Richmond gives its decision on a Full Plans application within five weeks.
The last owner fitted our Barnes bathroom without sign-off. Does that matter?
It can matter when you sell, if the work needed approval. Richmond offers three types of Building Regulation application, and Regularisation is the one for work already done. For a bathroom the inspector may want to see the waste falls, the extraction and any joists that were notched, which can mean lifting a section of floor. If the Barnes bathroom is being replaced anyway, it is simpler to make the new one the subject of a fresh Building Notice and keep that record.
How much notice does Richmond building control need before a Barnes bathroom starts?
Two separate requirements apply. After a Building Notice is submitted in Richmond there is a 48 hours wait before work may start, and Richmond building control also asks for 2 days notice that you intend to commence works. Give both before the old suite comes out, not on the morning of strip-out. In a Barnes flat, tell the freeholder and the flat below the same start date so access and water shut-offs are agreed.
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