A bathroom renovation is one of the most common home improvement projects in London — and one of the most variable in cost. The same floor area can be renovated for £5,000 or £50,000 depending on specification. Here is an honest cost guide for 2025.
What Affects Bathroom Renovation Costs?
Scope: Are you retiling over existing tiles (minimal structural change) or stripping to the bare structure and rebuilding from scratch? Full strip-out and rebuild is significantly more expensive.
Sanitaryware specification: Entry-level ceramic basin and WC from a trade merchant vs. bespoke stone resin or designer sanitaryware from a premium brand. The range spans 5:1 or more.
Tiling specification: Basic wall and floor ceramic tile vs. premium large-format porcelain or natural stone. Similarly 5:1+ in cost range.
Shower specification: Thermostatic shower tray enclosure vs. frameless glass wet room vs. freestanding shower. Significant cost difference.
Electrical and plumbing works: If the bathroom requires moving of soil or waste connections, new electrical circuits, or underfloor heating, these add substantially to base cost.
Typical London Bathroom Renovation Costs
Small Bathroom (4–6m²)
| Specification | Supply & Fit Cost |
|---|---|
| Basic (standard sanitaryware, ceramic tile, basic shower) | £4,000–£7,000 |
| Mid-range (better sanitaryware, porcelain tile, thermostatic shower) | £7,000–£12,000 |
| High specification (premium sanitaryware, large-format tile, frameless screen) | £12,000–£22,000 |
Main Family Bathroom (6–9m²)
| Specification | Supply & Fit Cost |
|---|---|
| Basic | £5,500–£9,000 |
| Mid-range | £9,000–£16,000 |
| High specification | £16,000–£30,000+ |
Master En-Suite (6–10m²)
| Specification | Supply & Fit Cost |
|---|---|
| Basic | £6,000–£10,000 |
| Mid-range | £10,000–£18,000 |
| High specification (wet room, freestanding bath) | £18,000–£40,000+ |
What's Included in These Costs?
Supply-and-fit costs above typically include:
- Strip out of existing bathroom
- New waterproofing/tanking to shower area
- Supply and installation of sanitaryware (WC, basin, bath/shower)
- Tiling to walls and floor
- New flooring
- Heated towel rail
- Lighting (standard)
- Ventilation (fan, ducted to outside)
- Painting
Typically excluded: structural works, joinery, new soil connection routing, underfloor heating, bespoke furniture.
rcbGroup
rcbGroup delivers bathroom renovations as part of full refurbishment packages — managing strip-out, waterproofing, plumbing, electrics, tiling, and fit-out as principal contractor across London.