Bathroom Renovation New Cross
Bathroom and wet-room refurbishment in New Cross, 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 refurbishes bathrooms across New Cross, making the most of the compact spaces found in SE14's flats and in its Victorian and Edwardian terraces. We deliver full bathrooms, en-suites and wet rooms with proper waterproofing, ventilation and drainage, tiled and finished to last.
In New Cross, 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 New Cross: 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 New Cross
New Cross range: choose above
How the job runs
- Free design visit at your New Cross 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 New Cross
A bathroom only lasts if the waterproofing is right, so in New Cross we tank walls and floors properly before a single tile goes on. This matters especially in a wet room or walk-in shower, where the whole floor takes water, and in a flat or upper-floor bathroom, where a leak would carry straight through to the room below. We form falls to the drain and bond the tanking into the substrate.
Many SE14 bathrooms sit in a converted rear closet wing or a boxed return where the original drainage was never designed for a modern suite. We rework the soil and waste runs to fall correctly, add proper extraction to clear moisture from these enclosed spaces, and make sure the ventilation meets building regulations. Getting the unseen work right is what stops damp, mould and failed grout appearing a year later.
Housing in New Cross
On the valuation list New Cross counts about 12,080 homes, 72% flats and 28% houses; 43% predate 1919, 2% are interwar and 49% post-war. Where most homes are flats, a bathroom in a flat in New Cross sits over a neighbour's ceiling, so it is tanked before tiling and a moved WC needs the freeholder's licence.
An extra New Cross bathroom and the stack outside
Adding a second bathroom or an en-suite to a New Cross house means installing a new WC, and Lewisham says an inspection is needed where a WC or bath is installed or its position is altered. The fees chart also has a line for installation of a new bathroom. So a bedroom turned into an en-suite is notifiable work from the day it is planned. The inspector sees the new soil connection and its fall before the floor is boarded and the boxing closed, which means the layout, the WC position and the route to the stack are fixed at survey.
The route to the stack is where the building matters. In a Victorian New Cross house the soil stack often runs down the back wall, and a new bathroom at the front may need a new branch or a second stack. In the Hatcham conservation area, flats or subdivided houses have no permitted development rights and must seek planning permission for changes to the exterior, so a new external soil pipe on a divided house there needs planning. Route the waste inside, or to the existing stack, wherever the fall allows.
Space-saving bathrooms for SE14 homes
New Cross flats and period terraces rarely offer a generous bathroom, so clever planning does the heavy lifting. We design layouts that fit a walk-in shower, basin and toilet into a tight footprint, using wall-hung fittings and slim profiles to keep the floor clear and the room feeling larger. Underfloor heating frees the walls of a radiator and warms the tiled floor, which suits these often north-facing return bathrooms.
Squeezing an en-suite out of a bedroom or a landing is a frequent SE14 request, and the trick is running drainage and ventilation to the new position without disrupting the rest of the house. We tile, fit the underfloor heating and complete the electrics, with a registered electrician certifying the new circuits and changes around the bath or shower that are notifiable. The result is a practical, well-finished space that respects the character of the home.
- Concealed cisterns, frames and wall-hung sanitaryware
- Freestanding and built-in bath installation
- Ventilation and extraction ducted to outside
VOA Council Tax stock of properties, March 2025, for New Cross Gate, New Cross South and Telegraph Hill. Counts rounded by the VOA.
Trusted Bathroom Renovation in New Cross
New Cross owners choose GS Renovation because bathrooms are as much about the hidden work as the tiles. We tank and waterproof properly, sort drainage and ventilation around shared stacks, closet wings and returns, and finish to a high standard in tight SE14 spaces. One team, building regulations compliance on electrics and ventilation, and our founder's 30+ years of experience behind every job.
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 New Cross
What is the going rate for bathroom renovation around New Cross?
Three Lewisham builders will give three different numbers for bathroom renovation in New Cross, usually because they have scoped three different jobs within £6,000 to £20,000 or more (indicative). GS Renovation prices the SE14 property after a survey and sets out labour, materials, approvals and making good in the order they happen: the waste run is fixed before the tray goes down.
Can you fit an en-suite in my New Cross terrace bedroom?
In most SE14 terraces, yes. The main challenge is running drainage and extraction to the new position and waterproofing the space thoroughly, especially on an upper floor. We plan a space-saving layout with wall-hung fittings, tank the walls and floor, and add compliant ventilation. New circuits and changes around the bath or shower are notifiable under Part P and are certified by a registered electrician as part of the work.
How long does a bathroom refit take in a New Cross flat?
Plan on 10 to 15 working days. The early stage is noisy strip-out, which neighbours hear through shared floors, and any water shut-off to the building is agreed in advance. Then first fix, boarding and tanking, which needs time to cure, then tiling and fitting. If you have only one bathroom, arrange where to shower for those weeks.
What protects the flat below from my New Cross bathroom?
Tanking the floor and the wet walls before tiling, with sealed joints at every corner and pipe. Under the tray or wet-room former, the waste falls are set first and an access panel is kept so the trap can be reached later. In a converted house with timber floors, a leak shows downstairs quickly, so the membrane goes right up the walls.
Can the toilet move across the room in a New Cross bathroom?
Only as far as the soil pipe allows. The toilet needs a large pipe with a proper fall to the stack, and in a flat that stack is shared with the neighbours above and below, so it cannot move. Across a timber floor a short move is possible between joists running the right way; through concrete it is harder. A macerator is a last resort.
Does electric underfloor heating in a New Cross bathroom need its own circuit?
Usually yes. A new bathroom circuit is notifiable under Part P, so the mat's circuit, its protection and the thermostat are installed and certified by a registered electrician. Over a concrete floor in a post-war block, an insulation board under the mat stops heat going into the slab. Over timber, the boards are stiffened first so the tiles do not crack.
Can a shower room be built into a new New Cross rear extension on one application?
Yes. Lewisham's building control fees chart has a line for a single storey extension including installation of a new toilet or bathroom. A shower room built into a new rear extension on a New Cross house goes on the same application as the extension. The new soil run from the extension is designed with the foundations and tested along with the other drains, so the bathroom first fix follows the drain test.
What protects the flat below when a bathroom is refitted in a divided New Cross house?
In New Cross 72% of homes are flats, and in a divided Victorian house the bathroom floor is timber over someone else's ceiling. Before tiling, the floor is stiffened, boarded and waterproofed, with the membrane turned up the walls. Lewisham's own inspectors check that building work complies with building regulations, and where a WC or bath moves, the new waste is inspected too. We also leave an access panel to the trap and tell the neighbour below which day the water is off.
Is a bathroom in a post-war New Cross home planned differently?
The construction differs more than the paperwork. In New Cross 49% of homes were built after 1945, and in a post-war infill house or block the floor may be concrete, so a new waste cannot drop between joists. It runs in a raised floor or a boxed route to the stack. The notification rules stay the same. Survey the floor at the start, because it decides where the WC and shower can go.
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