How Much Does a Wet Room Cost in 2026? (UK)
A wet room costs £5,000–£12,000 to install in 2026, with most standard 4–5m² conversions landing around £6,000–£8,500. A compact cloakroom wet room can come in under £5,000, while a large or fully accessible room with underfloor heating and premium tiling runs to £15,000. The single biggest cost is getting the waterproofing and drainage right — the part you never see. Here is what a wet room really costs in 2026, how the price splits by size and region, and exactly what is in the figure.
What a wet room costs in 2026
A wet room is a fully waterproofed, level-access bathroom where the shower drains straight through the floor with no tray or step. That open, tanked construction is what you are paying for: in 2026 a wet room costs £5,000–£12,000, and most standard installations settle at £6,000–£8,500. Roughly 30–40% of that goes on the hidden work — tanking, the drainage former and the graded screed — before a single tile is laid.
This page answers the “how much” quickly. For the full room-by-room breakdown, accessibility options and a live quote form, see our detailed wet room cost guide, the main home for wet room pricing.
Typical wet room cost by size — 2026
Installed cost at a standard specification. Underfloor heating, premium tiling and full accessibility push each size toward the top of its band.
Source: BestBuilders 2026 quote data · 519 UK towns
What the price includes — and what it does not
A wet room quote usually covers the waterproof construction and labour, but tiles, fittings and a few upgrades are commonly priced separately. Knowing the split stops a low headline figure catching you out:
| Cost element | Typical amount | In a standard quote? |
|---|---|---|
| Tanking / waterproof membrane | £500–£1,200 | Yes — never skip it |
| Drainage former, linear drain & graded screed | £700–£1,500 | Yes |
| Wall & floor tiling (labour) | £1,200–£2,500 | Yes — tiles supplied separately |
| Tiles (supply) | £20–£80/m² | Usually your budget line |
| Shower valve, screen & fittings | £400–£1,200 | Often a separate supply line |
| Electrics & extractor (Part P) | £350–£700 | Yes |
| Underfloor heating | +£600–£1,200 | Optional upgrade |
| Removing the old bathroom | +£400–£900 | Extra if not stated |
Read a headline wet room price as the waterproof shell plus labour, then add your tile and fittings budget and any upgrades to reach a realistic total.
Cost by room size and type
Size and purpose drive the figure more than anything else. A compact cloakroom conversion shares little with a full accessible wet room built for step-free, wheelchair-friendly use.
| Wet room type | Typical installed cost (2026) | What you get |
|---|---|---|
| Cloakroom wet room (2–3m²) | £4,500–£6,500 | Compact shower, WC and basin, tanked floor |
| Standard wet room (4–5m²) | £6,000–£9,000 | Full walk-in shower, screen, mid-range tiling |
| Accessible wet room (4–5m²) | £8,000–£11,000 | Level access, grab rails, seat, slip-resistant floor |
| Large / premium (6m²+) | £10,000–£15,000 | Underfloor heating, premium tiles, double drainage |
Planning an accessible room? A Disabled Facilities Grant can cover much of the cost, and our guides on wet rooms for disabled access and wet rooms for elderly users cover the design detail.
Cost by region
Where you live moves the figure as much as 30%. Labour rates in London and the South East carry a clear premium over the North and Wales for the same standard 4–5m² wet room.
| Region | Typical standard wet room (2026) | Vs UK average |
|---|---|---|
| London | £8,500–£13,000 | +20–30% |
| South East | £7,500–£10,500 | +10–20% |
| South & East England | £6,800–£9,500 | +5–10% |
| Midlands | £6,000–£8,500 | Around average |
| North West & Yorkshire | £5,500–£7,800 | −5–10% |
| North East & Wales | £5,000–£7,200 | −10–15% |
What pushes a wet room above or below the average
- Waterproofing standard: a full tanking system on walls and floor costs more than a cheap membrane, but it is the one place never to economise.
- Floor build-up: a timber floor needs a former and reinforced screed to create the fall, which costs more than a simpler concrete floor.
- Tiling area and spec: full-height wall tiling and large-format or natural stone tiles add labour and material cost.
- Accessibility: grab rails, a fold-down seat, a level threshold and a wider door all add to a standard build.
- Underfloor heating: popular in a wet room to dry the floor, adding £600–£1,200.
- Below average: a small footprint, ceramic tiles, a single drain and keeping the existing layout all pull the price toward £5,000.
See the full wet room cost breakdown
This page gives you the quick answer. For the detailed element-by-element breakdown, accessibility options and a quote form tuned to wet rooms, head to the main cost guide — the commercial home for wet room pricing.
How long a wet room takes to install
A standard wet room takes 7–15 working days from strip-out to grouting. The waterproofing and screed need proper drying time before tiling, so a good installer will not rush the tanking — that curing window is exactly why a wet room takes longer than a like-for-like bathroom refit. A larger or fully accessible room, or one that needs the floor structure altered, can run to three weeks.
Planning permission and building regulations
Converting an existing bathroom or bedroom into a wet room is an internal change, so it does not need planning permission in almost every case (listed buildings are the exception — check first). Building Regulations do apply: the electrics must be installed and certified to Part P, the room needs adequate mechanical ventilation, drainage must meet the regs, and any notching or alteration of floor joists must keep the structure sound. The tanking itself is not a formal building-control item, but it is the part that protects the structure — insist on a proper system and a guarantee.
Checklist: hiring a wet room installer
- Ask exactly which tanking system they use and what guarantee comes with the waterproofing.
- Confirm whether tiles and fittings are supply-and-fit or your budget — a low quote often excludes them.
- Check the quote states the drainage method (linear channel or point drain) and the floor build-up.
- Ask to see two recent wet rooms you can visit or call about, not general bathroom work.
- Confirm the electrics will be Part P certified and ventilation included.
- Compare three itemised quotes on the same spec so the prices are genuinely like-for-like.
FAQs: wet room cost
Get 3 Free Wet Room Quotes — Vetted UK Installers
Tell us your room size and whether you need accessible features, and we will match you with up to three vetted local bathroom fitters who tank and drain wet rooms properly. Compare itemised quotes with no cost and no obligation.