Bathroom renovations in London range from £4,000 for a budget refresh to £25,000+ for a luxury wet room with underfloor heating, premium tiling and bespoke fittings. The variance comes down to scope: are you upgrading the existing suite, or relocating plumbing, knocking through walls, and installing high-end finishes?
Here's the complete 2026 guide to bathroom renovations in London — costs, what's included, timeline, and the hidden extras to watch for.
How much does a bathroom renovation in London cost?
Realistic 2026 ranges:
| Scope | Cost | Timeline |
|---|---|---|
| Cosmetic refresh Re-tile, new basin/taps, paint | £4,000-8,000 | 1-2 weeks |
| Full refit (same layout) New suite, tiling, flooring, lighting | £8,000-15,000 | 2-4 weeks |
| Layout change / en-suite addition Plumbing relocation, new walls | £12,000-20,000 | 3-5 weeks |
| Luxury wet room High-end fittings, custom tiling, UFH | £18,000-25,000+ | 4-6 weeks |
London prices run about 20% above the UK average. Drivers: skilled-trade premium, access constraints in older properties, parking suspensions for skips.
What's actually included in a London bathroom renovation?
A full refit quote should cover:
- Strip-out and waste removal
- New suite (bath/shower, basin, WC) — typically £800-3,500 retail depending on quality
- Plumbing — pipework, hot/cold connections, isolation valves
- Electrical work for zoned bathroom lighting, extractor, shaver socket, underfloor heating
- Tiling — walls and floor, typically £20-80/m² for the tiles plus £40-70/m² for the fitting
- Plastering and decoration
- Sealing, snagging, final clean
The variance in cost is mostly driven by three things: suite quality, tile quality, and whether you're moving plumbing.
Hidden costs to watch for
Bathroom renovations in London famously go over budget when these aren't priced upfront:
- Old pipework discoveries — Victorian and Edwardian properties often have lead supply pipes or galvanised steel waste pipes that need replacing once exposed. Add £400-1,500.
- Asbestos in old ceilings — pre-1980s artex ceilings should be tested. Removal is £300-800.
- Joist reinforcement if installing a heavy stone bath or freestanding bath. £400-1,000.
- Tanking / waterproofing for wet rooms — essential and not always included in basic quotes. £600-1,500.
- Soil pipe relocation if you're moving the WC. £500-1,500 plus making good.
Get these explicitly listed in the quote — either "included" or "if needed, £X". A reputable contractor will be upfront about them.
Do I need planning permission for a bathroom renovation?
Almost never. Internal alterations to existing bathrooms don't need planning. You will need planning if:
- You're adding an external soil pipe to a property in a conservation area or on a listed building
- You're extending to add the bathroom
- The property is listed and you're touching original fixtures
You'll need Building Regs sign-off for the electrical work (Part P), any structural changes, and any drainage modifications. A good contractor handles this as part of the project.
Wet room vs traditional bathroom — which makes sense for a London home?
Wet rooms work well in London when:
- You have a compact bathroom (under 3m × 2m) — wet rooms feel bigger
- You're adding an accessible bathroom for an aging family member
- Your property has solid concrete floors (easier to install proper drainage falls)
Wet rooms are problematic when:
- You're on the upper floor of a wood-joisted Victorian — tanking and drainage are harder, costs go up 30-50%
- You also want a bath — wet rooms are shower-only
- You're planning to sell soon — buyers often prefer a traditional bath
Timeline — what to expect
For a standard full refit (3-4 weeks):
- Days 1-3 — Strip out, removal of old suite, waste disposal
- Days 4-7 — First-fix plumbing & electrical, soil pipe modifications
- Days 8-12 — Plastering, wall preparation, underfloor heating if installed
- Days 13-18 — Tiling (walls then floor)
- Days 19-22 — Second-fix plumbing & electrical, suite installation
- Days 23-25 — Sealing, decoration, snagging, final clean
If it's your only bathroom, expect 2-3 weeks without a working shower. Most London households either set up a temporary shower in the garden (yes, really), use a gym shower, or arrange to stay elsewhere for a week or two.
How to avoid common bathroom renovation mistakes in London
- Order tiles 10-15% over — Cuts, breaks, and future repairs all need stock. London-popular tile ranges often go out of stock.
- Choose your suite before signing the contract — Saves "spec to be confirmed" line items that balloon later.
- Don't skimp on the extractor fan — A cheap one is loud and underpowered, leading to damp and mould. Pay for a quiet, properly sized inline fan.
- Underfloor heating is worth it — adds £600-900 for a typical bathroom but makes the bathroom usable on cold mornings without warming the whole house.
- Lock in your contractor's timeline contractually — Bathroom projects famously drift. A milestone-based payment schedule (not date-based) keeps everyone honest.
Final thought
Bathroom renovations in London are some of the highest-impact projects you can do — they materially change daily life and recover most of the cost on resale. The keys to success: get a detailed itemised quote that calls out hidden-cost categories explicitly, choose your fittings before signing rather than during the build, and pick a contractor who handles plumbing and electrical in-house rather than subcontracting.
TrustBuilt Projects has delivered bathroom renovations across London — from compact flat refurbishments to luxury wet rooms in period homes. See our bathroom refurbishment service or book a free site visit.