What does a wet room cost?
As a national mid-range guide: £8,000 to £13,000, including 20% VAT. Budget finishes start around £4,800, premium runs to £18,200, and London adds a quarter. Set your finish level and region below for an instant estimate, no email required.
Wet room, mid-range, Midlands
£8,000 to £13,000
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. Planning this in London? See the London 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.
How much does the region matter?
A lot: London typically runs 20 to 35 percent above the national average (this site plans with +25%, the quarter mentioned above), and the North of England, Scotland and Northern Ireland sit 10 to 20 percent below. The calculator adjusts for your region automatically, and the regional overview shows every factor.
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.