Wet rooms have gone from a luxury hotel feature to something thousands of homeowners across the UK are fitting in their own homes every year. But before you commit, understanding wet room installation cost properly is essential. The numbers vary quite a bit depending on the size of the space, the finish you want, and who you get to do the work.
What Is a Wet Room, Exactly?
A wet room is a fully waterproofed bathroom where the shower area has no tray, no enclosure, and no barrier to step over. The floor is tanked, graded toward a drain, and tiled continuously with the rest of the room. The result is an open, seamless space that looks minimal and contemporary.
They are particularly popular in smaller bathrooms (because removing the shower tray footprint opens up the space considerably) and in accessibility projects where stepping over a tray is a problem. But they work brilliantly in larger, high-end en suites too.
Wet Room Installation Cost: The Numbers
Here is a straightforward breakdown of typical wet room costs in 2025 at different budget levels. All figures include labour and materials unless stated otherwise:
| Wet Room Type | Typical Cost | Key Features |
| Small wet room (up to 1.5m x 1.5m) | £4,000 – £6,500 | Tanking, linear drain, basic to mid-range tiling, screen or frameless glass |
| Medium wet room (standard bathroom size) | £6,500 – £10,000 | Full waterproofing, quality tiling, fixed glass panel, thermostatic shower valve |
| Large / en suite wet room | £10,000 – £16,000+ | Designer tiles, bespoke glass, rainfall shower, integrated lighting, underfloor heating |
| Accessible / level access wet room | £5,500 – £9,000 | Wider floor drain, grab rails, fold-down seat, non-slip tiles, level threshold |
These figures assume you are converting an existing bathroom. If it is a new build or extension, costs may differ because plumbing runs and floor construction will vary.
What Goes Into a Wet Room Installation?
A lot more than most people realise, and understanding this is important because it explains where the money goes.
Tanking and Waterproofing
This is the most critical part of the job and there is no cutting corners here. Every surface in the wet area needs to be properly waterproofed with a tanking membrane. If this is done poorly, you will have water leaking through to the floor below within months. It takes time and care to do right.
Floor Preparation and Gradient
The floor needs to be graded toward the drain so water flows away efficiently rather than pooling. In most existing homes, this means either raising the floor level slightly to create the fall, or recessing the drain into the subfloor. Both approaches add labour time and cost compared to fitting a standard shower tray.
Drain Selection
Linear channel drains are the most popular choice for wet rooms because they allow large format tiles to run up to the drain without cutting them to awkward shapes. Square point drains are less expensive but work better with smaller tiles. The drain is set into the floor during the build, not added afterwards.
Tiling
Wet room tiling is more complex than standard bathroom tiling. Every joint, corner, and surface transition needs to be treated carefully to maintain the waterproof integrity of the room. The tile choice also matters for safety: slip resistance ratings (R9 minimum for wet areas, R10 or R11 for walk-in showers) are not optional.
Glass Screen or Panel
Most wet rooms include at least one fixed glass panel or hinged screen to stop water spraying across the entire room. Frameless glass looks best and is easier to clean, but it costs more than framed alternatives. A quality 8mm frameless panel runs around £400 to £800 fitted, depending on size.
What Pushes Wet Room Costs Up?
Here are the main factors that move the final price:
| Cost Factor | Typical Impact on Price |
| Upstairs installation | Adds £800 to £1,500 for structural reinforcement and managing floor joist depth for the drain |
| Moving the plumbing | Relocating shower or waste positions adds significant labour and material cost |
| Designer or large format tiles | Premium tiles can add £1,000 to £3,000 vs mid-range options on the same job |
| Underfloor heating | Typically adds £600 to £1,200 to the wet room cost; most popular in larger en suites |
| Bespoke glass panels | Custom-sized frameless glass is more expensive than standard sizes; allow £150 to £400 extra |
| Older properties with surprises | Crumbling plaster, substandard pipework, or uneven floors found on strip-out all add time and cost |
Wet Room vs Standard Shower: Is It Worth the Extra Cost?
A standard shower enclosure with a tray costs less to install, typically £1,500 to £3,500 for a quality fitting including tray, glass, valve, and labour. So a wet room does cost more upfront.
But here is what you get in return:
- A far more premium visual result that adds more value to your home
- No shower tray to crack, discolour, or become difficult to clean
- No door tracks or frame edges where mould accumulates
- Better accessibility, no step or barrier to navigate
- More perceived floor space, particularly in smaller bathrooms
For most homeowners who are doing a full renovation anyway, the additional cost of going wet room over a standard shower is not enormous as a proportion of the total job. It is worth having the conversation.
Why Using a Local, Experienced Fitter Matters
Wet rooms are unforgiving if the waterproofing is done incorrectly. Unlike a leaking silicone seal around a shower tray (which is easy to spot and easy to fix), a poorly tanked wet room can leak slowly and silently into the structure of your home for months before you notice. By that point, you are looking at significant remedial work.
This is not meant to alarm you, it is just the reason why choosing a fitter with real wet room experience is worth more than saving a few hundred pounds on the cheapest quote.
| Get a Proper Quote for Your Wet Room Every wet room quote we provide is based on actually looking at your bathroom, not guessing from a description. Call us on 01242 375063 and we will arrange a visit at a time that suits you. No obligation, no hard sell, just a clear price for the job. |
Frequently Asked Questions
How long does a wet room take to install?
Most wet room conversions take between 5 and 8 working days from strip-out to completion. Larger or more complex projects may take a little longer. We will always give you a clear timeline before we start.
Do wet rooms add value to a property?
Yes, particularly in mid to upper market properties. A well-fitted wet room in an en suite is viewed very positively by buyers and can add more perceived value than an equivalent spend on a standard shower room.
Can any bathroom be converted to a wet room?
Most can, but there are considerations around floor construction, drain depth, and whether the subfloor can accommodate the required fall to the drain. An upstairs wet room in an older property needs more structural work than a ground floor installation. We will assess all of this during our site visit.
Do I need planning permission for a wet room?
No, in virtually all cases a wet room conversion is permitted development. It is internal work and does not affect the external structure of the property. We will flag anything unusual if it arises during our assessment.
Disclaimer: All prices and information in this article are for general guidance only and may change over time. Actual costs and job requirements may vary depending on location, suppliers, and project specifics. We are not responsible for any errors, omissions, or outcomes resulting from the use of this information. Always seek updated quotes or professional advice before making decisions.
