Bathroom Renovation Dulwich
Bathroom and wet-room refurbishment in Dulwich, 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 builds bathrooms, wet rooms and en-suites across Dulwich, making the most of the awkward spaces that come with SE21's Victorian and Edwardian terraces. We handle the waterproofing, drainage, tiling, heating and ventilation properly, so your bathroom near Dulwich Park stays dry and warm for the long term.
In Dulwich, 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 Dulwich: 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 Dulwich
Dulwich range: choose above
How the job runs
- Free design visit at your Dulwich 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 and wet rooms in Dulwich
A bathroom is only as good as what sits behind the tiles, so we tank and waterproof thoroughly before anything is fixed. This matters in Dulwich's older terraces, where timber floors and solid walls move and settle over the years and a poorly sealed shower will find every weakness. For walk-in showers and full wet rooms we form falls to the drain correctly and bond the tanking into the surrounding surfaces.
We also sort the parts nobody sees but everyone feels. Old SE21 houses often have long or shallow soil runs and tired ventilation, so we upgrade the drainage and fit proper extraction to keep humidity, mould and condensation under control. Underfloor heating goes in where the floor build-up allows, giving you a warm, dry bathroom that suits a solid-walled period home rather than fighting against it.
Housing in Dulwich
The stock in Dulwich runs to roughly 14,360 dwellings, 55% of them flats and 45% houses, built 56% before 1919, 11% between 1919 and 1939 and 30% after 1945. Where most homes are flats, a bathroom in a flat in Dulwich sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.
Bathrooms stacked over neighbours in Dulwich flats
55% of homes in Dulwich are flats, so a bathroom being renovated here is quite likely to sit over, or under, someone else's bedroom or kitchen. That changes the priorities. The waste has to reach the shared soil stack at a fall without cutting deeper notches in joists that also carry the neighbour's ceiling, and a failed shower tray shows up in their home before it shows in yours. The lease may also set rules for floor finishes and for working hours in the building.
Before a Dulwich flat bathroom is stripped, find out where the stack runs and who is responsible for it, because in a converted house the stack is often part of the building the freeholder repairs. If the plan moves the WC, the new connection to that stack needs the freeholder's consent as well as good workmanship. Pressure test the new pipework before the floor goes down, and leave an access panel at the stack connection so the next leak can be traced without lifting tiles.
Space-saving layouts for SE21 period homes
Bathrooms in Dulwich terraces are often tucked onto a half-landing or squeezed into the end of the closet wing, so clever planning matters more than square footage. We rework the layout to make every inch count, choosing wall-hung sanitaryware, slimline concealed cisterns and walk-in showers that open up a tight room, while keeping the proportions sympathetic to the age of the house.
Adding an en-suite to a main bedroom is a popular SE21 upgrade, and we plan the drainage, waterproofing and ventilation to work within the existing structure without weakening it. Internal bathroom work does not need planning permission, though new circuits, and changes to circuits near the bath or shower, are notifiable under Part P, so each is certified by a registered electrician, or notified to building control. The finish, from tiling to lighting, is handled by the same team throughout.
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 Southwark Council, and doing it without consent is a criminal offence.
- Full plumbing, drainage and waterproofing (tanking)
- Ventilation and extraction ducted to outside
- Concealed cisterns, frames and wall-hung sanitaryware
VOA Council Tax stock of properties, March 2025, for North Dulwich, East Dulwich, Herne Hill & Dulwich Park and Dulwich Hill. Counts rounded by the VOA.
Why Choose GS Renovation in Dulwich
Dulwich homeowners choose GS Renovation because we get the hidden work right first, the tanking, drainage and ventilation that decide whether a bathroom lasts. We plan clever layouts for the tight, awkward spaces in SE21 terraces, have the electrics certified by a registered electrician under Part P, and finish to a high standard. After our founder's 30+ years on the tools, we know how these period homes behave around water.
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
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 brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
FAQ
Frequently Asked Questions about Bathroom Renovation Dulwich
Does the cost of bathroom renovation rise in a Victorian or Edwardian Dulwich property?
In a Victorian or Edwardian Dulwich home the unknowns behind plaster are what move a bathroom renovation figure within £6,000 to £20,000 or more (indicative), which is why the SE21 survey matters more there. GS Renovation prices the visible work, names the risks, and agrees anything additional in writing. The approvals do not change with age: Part F extraction to outside, and Part P certification for any new circuit applies either way.
Can you fit a wet room in the tight bathroom of my Dulwich terrace?
Yes. Wet rooms actually work well in the compact bathrooms typical of SE21 period houses, because a walk-in layout can free up space a bath and enclosure would swallow. The key is proper tanking, correctly formed falls to the drain and good ventilation, all of which we handle in-house. Any electrics near water are certified by a registered electrician under Part P.
How long does a Dulwich bathroom renovation take?
Allow 10 to 15 working days on site for a full strip and refit. The early days go on strip-out, first fix plumbing and electrics and any floor repairs; tanking must cure before tiling starts, and sanitaryware and electrics are connected last. If the house has one bathroom, a temporary toilet connection is often kept working, and showering elsewhere during the tiling stretch is worth arranging in advance.
Can I move the toilet across my Dulwich bathroom?
The toilet can travel only a short way. Its outlet is a wide pipe needing a steady fall, so it generally sits near the soil stack, which in SE21 period houses usually runs down the rear wall. Moving it across a timber floor means running the pipe between joists heading the right way, or boxing it above floor level. In a flat the stack is shared with the flats above and below, which fixes the connection point.
Will the joists in my Dulwich house take a cast-iron bath?
They may need help. A filled bath with someone in it is a heavy load, and joists in a period Dulwich house have often been notched for pipes and cables over a century. Before a heavy bath goes in, the floor is opened, notches are checked and joists are strengthened or doubled where needed. Positioning the bath across several joists and near a bearing wall also spreads the weight.
Where does the extractor duct go in a Dulwich bathroom?
Through the nearest external wall if there is one. Part F wants the extractor vented to open air, so where the Dulwich bathroom has an external wall the fan goes straight through it. An internal bathroom needs the duct run through the ceiling void to an outside wall or the roof, following the joists. External changes such as a new vent may need permission in a conservation area, so rear or roof routes are preferred.
Does adding an en-suite to a Dulwich house need building control?
Yes, when it is a new installation rather than a like for like refit. Southwark's final fees and charges schedule has a separate building control line for installing a new WC, shower or utility, shown before VAT. The inspection covers the drainage connection, the fall and the extraction, which are what a new en-suite adds. Replacing an existing suite in the same position does not normally need an application, though new electrical circuits near the shower still have to be certified.
Will a top floor shower in a tall Dulwich villa have enough pressure?
Not always on a gravity system. In a period villa with a cold water tank in the roof, a shower on the floor just below the tank has little height to work with, so the flow can be weak. The fixes are a pump, an unvented cylinder fed from the mains, or a combination boiler where the mains pressure allows. Test the incoming mains pressure and flow at the kitchen tap before choosing the shower valve.
Can a bathroom be moved in a post-war Dulwich block?
Rarely far. 30% of homes in Dulwich were built after 1945, and in a post-war block the bathrooms are often stacked one above another on a shared stack in a duct. A concrete floor slab gives no void for a new waste run, so moving the WC away from the duct means a raised floor or a pumped system. Ask the managing agent for the building drawings, which show the duct and whether the slab may be cored.
Every Service, One Team
More GS Renovation Services in Dulwich
One team for every GS Renovation service in Dulwich:
Same Service, Nearby Areas
Bathroom Renovation Near Dulwich
We carry out bathroom renovation across Dulwich and the surrounding areas. Explore a nearby location:
Ready to Start Your Dulwich Project?
Free, no-obligation quote for bathroom renovation in Dulwich.