Bathroom Renovation Eltham
Bathroom and wet-room refurbishment in Eltham, 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 across Eltham, working within the layouts of 1930s semi-detached and interwar houses where space is often tight upstairs. We deliver fully waterproofed, well-drained bathrooms and en-suites finished to a lasting standard.
In Eltham, 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 Eltham: 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 Eltham
Eltham range: choose above
How the job runs
- Free design visit at your Eltham 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 Eltham homes
A bathroom that lasts starts with proper waterproofing. Before any tile goes on, we tank the walls and floor in wet areas so moisture cannot track into the structure of an older SE9 house. For walk-in showers and full wet rooms we install the correct falls, drainage and a sealed substrate, which matters in interwar homes where original floors are not always level and hidden leaks can rot timbers over time.
Ventilation is just as important as tanking. Eltham bathrooms in these houses can suffer from condensation and damp if extraction is poor, so we fit properly rated extractor fans and, where needed, improve the airflow. Add underfloor heating, quality tiling and good lighting, and the room stays warm, dry and free of the mould that plagues neglected bathrooms in period property.
Housing in Eltham
The stock in Eltham runs to roughly 14,360 dwellings, 27% of them flats and 73% houses, built 17% before 1919, 52% between 1919 and 1939 and 30% after 1945. 35% of homes here are semi-detached; a semi in Eltham can vent its bathroom through the flank.
Interwar bathroom layouts and flats above neighbours in Eltham
52% of homes in Eltham were built between 1919 and 1939. A bathroom of that period was planned as a small room for a bath and basin, often with the WC in a separate compartment next door and the soil pipe on the outside wall. If you want the two rooms merged, the partition between them may be light stud or thin block, which the survey checks, but the WC position is tied to where the soil pipe leaves the house. Moving the WC along the wall is straightforward; moving it away from the outside wall means a new stack or a longer run under the floor.
27% of Eltham homes are flats, and a bathroom in an upper-floor flat sits over someone else's ceiling. Before any tiling we pressure test the new supply pipes and flood test the shower tray or wet room former, because a leak found after the tiles go on is found by the neighbour below. The lease may also restrict placing a bathroom over a living room or bedroom of the flat underneath, so read it before the layout is drawn, and tell the owner below which days the water will be off.
En-suites and space-saving layouts in SE9
Interwar Eltham houses often have a generous main bedroom that can give up a corner for an en-suite, or a boxroom that suits a compact shower room. We plan the layout carefully around existing soil pipes and joists, since moving drainage in these homes takes thought rather than guesswork. Careful positioning of the WC, basin and shower makes even a small space feel usable rather than cramped.
In the family bathroom, small changes to the layout can free up real room, such as swapping a bulky bath for a walk-in shower or repositioning the basin to open the floor. New circuits, and changes to circuits around the bath or shower, are notifiable under Part P, so they are certified by a registered electrician. The result is a bathroom that fits the proportions of a 1930s SE9 house and works for a busy household.
- Notifiable bathroom electrics certified by a registered electrician under Part P
- Underfloor heating and heated towel rails
- Freestanding and built-in bath installation
VOA Council Tax stock of properties, March 2025, for all 5 statistical areas in Eltham. Counts rounded by the VOA.
Why Eltham Homeowners Choose GS Renovation
Eltham homeowners choose GS Renovation because a bathroom is only as good as its waterproofing and drainage, which is easy to get wrong in an older SE9 house. We tank properly, sort ventilation, plan around existing soil pipes and have notifiable electrics certified by a registered electrician. With our founder's 30+ years on the tools, we deliver en-suites and family bathrooms built to stay dry and warm.
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…
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
FAQ
Frequently Asked Questions about Bathroom Renovation Eltham
Why do bathroom renovation quotes in Eltham vary so much?
Bathroom renovation quotes in Eltham spread widely because scope, not skill, is what differs. A figure that omits any Part P electrical certificate, any Royal Borough of Greenwich building control fee or the making good will always undercut one that includes them. Sequence is where cheap quotes cut corners: any underfloor heating is laid and tested before the floor is tiled. GS Renovation lists each element for the SE9 address against £6,000 to £20,000 or more (indicative).
Can you fit an en-suite in the main bedroom of my Eltham interwar house?
Often yes. The generous main bedrooms in Eltham's interwar houses can usually spare a corner for an en-suite. The key is planning the layout around existing soil pipes and joists so drainage runs correctly. We tank the wet areas, fit proper ventilation and underfloor heating, and have the notifiable electrics certified by a registered electrician, giving you a compact, fully waterproofed shower room that fits the house.
How long does a bathroom refit take in an Eltham semi?
Allow 10 to 15 working days for an Eltham semi. The old suite and tiles go and pipes are repositioned, then boarding, tanking and a drying period that cannot be hurried, then tiling and fitting. If it is your only bathroom, the WC is reconnected each evening where possible, and you hear in advance which days it stays off.
Can a heavy stone bath go on the first floor of an Eltham 1930s house?
Only after the joists have been checked. A cast stone or iron bath full of water and a person is a concentrated load, and the joists in a 1930s semi were sized for a light steel bath. The engineer looks at span, size and any notching by earlier plumbers, and may specify extra joists or a spreader beneath the feet before it goes in.
Will a rainfall shower work with the boiler in my Eltham home?
It depends on the system. A combi gives mains pressure but only heats so fast, so a large head can run tepid. A cylinder fed from a loft tank gives low pressure unless pumped. A pressurised cylinder suits big showers but needs space. Measure the flow rate before choosing the shower.
Where does the extractor duct run from an Eltham bathroom?
Usually up into the loft and out through the soffit or a roof tile vent. Part F requires the extraction to reach outside, not the loft space. In the roof the duct is insulated and laid to fall away from the fan, so condensation in a cold duct drains out instead of back into the ceiling. A short, straight route performs better than a long one.
Does a new en suite in an Eltham house need building control?
Where it connects a new WC or shower to the drains, yes, because that is a drainage alteration, which Royal Greenwich treats as simple work suited to a building notice given two days before the work starts. The new extract fan must be ducted outside, and a new circuit is certified by a registered electrician. The en suite waste may have to cross the joists to reach the stack, so check that route before choosing the corner.
Can an en suite go in a first-floor rear extension in an Eltham conservation area?
Yes, but only with planning permission. Royal Greenwich's Urban Design Guide excludes first-floor rear extensions from permitted development in conservation areas, so an en suite built out over the ground-floor kitchen goes through an application at an address inside one. Outside a conservation area the permitted development limits still apply, and the drawing is checked against them before the bathroom layout is fixed.
Can a wet room go into a pre-1919 Eltham house with a timber floor?
Usually, once the joists have been looked at. 17% of homes in Eltham were built before 1919, and in a house that old the bathroom floor is boards on joists that several plumbers may have notched. A wet room needs the floor dropped between the joists or built up to form the fall to the drain, and notched joists are repaired first. Lift the floor at survey, because the joists decide the method.
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