What does a wet room cost in London?
In London: £10,000 to £16,300 at mid-range, including 20% VAT, against £8,000 to £13,000 nationally. Budget starts around £6,000, premium runs to £22,800. Set your finish level and region below, no email required.
Wet room, mid-range, London
£10,000 to £16,300
Including 20% VAT. An indication, not a quote: prices vary per trade and property.
Take it further
Prices include 20% VAT. New builds and some energy-saving works can qualify for 0% or reduced VAT; ask your installer.
Got quotes in already? Check if they are fair. Want to know when the money leaves? See the phase-by-phase plan.
What drives the price
- Tanking: the waterproofing envelope is the cost that a normal bathroom does not have.
- The gradient floor: building the fall into the floor is specialist work.
- Size: small wet rooms cost nearly as much as large ones; the kit is the same.
- Underfloor heating: common in wet rooms, and worth budgeting from the start.
All figures come from the same validated 2026 price data as the calculator above (sources: Checkatrade, MyJobQuote and comparable national 2026 cost guides, checked August 2026; see how we price), so this page and your estimate can never disagree. Outside London? See the national guide, or compare every region in the regional overview. How to pay for it (remortgage, loan or savings) is its own guide: paying for a renovation. Planning an extension or loft? Check permitted development first.
Frequently asked questions
Why is a wet room dearer than a normal bathroom?
The tanking (full waterproofing), the gradient floor and the flush drainage are extra layers of specialist work on top of everything a normal bathroom needs. That is also why a botched cheap wet room is the most expensive kind: water finds every shortcut.
Do these prices include VAT?
Yes, all ranges include 20% VAT. New builds and some energy-saving works can qualify for 0% or reduced VAT; ask your installer whether your project applies.
Why is London so much more expensive?
Labour is the driver: London trades charge roughly 25% above the national average, and parking, access and waste logistics add friction. Nationally this project runs £8,000 to £13,000; the calculator switches region in one click.
How accurate is this range?
It is a guide range from national 2026 cost guides, adjusted for finish level and region. Real quotes vary per trade, property and specification; treat it as a starting point, budget 10 to 15 percent contingency, and always get at least three itemised quotes.