Wet rooms cost 30–50% more than a like-for-like walk-in shower — but the reason why changes the decision. A clear comparison of cost, waterproofing, and resale before you choose.
August 23, 2026
Both are walk-in, both are frameless-glass-and-clean-lines, and from a listing photo they can look almost identical. The difference is underneath the floor — and it's the reason one costs meaningfully more than the other.
Featuring the Forge concealed shower system.
Last updated 23 August 2026 · Elani Journal
A walk-in shower — a shower enclosure with a raised or level-access tray — typically costs £3,500–£7,500 as part of a new bathroom. A true wet room, where the entire floor is waterproofed and the shower area drains directly into the floor with no tray at all, runs £6,500–£14,000. The gap isn't the glass or the fittings. It's tanking.
Wet room floors must be professionally tanked before tiling begins — done poorly, water can reach the joists within 18–24 months, a serious and costly problem to fix. Above ground floor, gravity drainage often isn't enough, so a pump-assisted system is needed, typically adding £800–£1,500 to the job.
A wet room's entire floor and lower walls have to be professionally waterproofed before a single tile goes down — a specialist job that can't be shortcut. Done properly, it's invisible and permanent. Done poorly, water reaches the joists within 18–24 months, which is a genuinely serious and expensive problem to fix retroactively. This is the single biggest reason to choose your installer on experience with wet rooms specifically, not general bathroom fitting.
Drainage is the other hidden cost. Ground-floor wet rooms can usually drain by gravity. Above ground floor, gravity often isn't enough, and a pump-assisted drainage system is needed — typically adding £800–£1,500 to the job.
This is where the decision gets genuinely personal rather than purely practical. Wet rooms have a slight resale edge over a bathroom with an ordinary walk-in shower, largely because they read as a considered, higher-spec renovation. But if your bathroom is the only one in the house and it currently has a bath, removing it for a wet room can reduce resale value by an estimated 3–5% in family-target properties — buyers with young children, in particular, tend to want at least one bath in the house.
If you have a second bathroom elsewhere, this caveat mostly disappears. If this would be your only bathroom, it's worth weighing seriously before committing.
It depends on what you value. A wet room offers a genuinely different look and feel — completely level, no tray, no frame — and slightly better long-term resale versus a standard walk-in shower. But if budget is the deciding factor, a well-specified walk-in shower with a low-profile tray gets close to the same visual result for meaningfully less.
Not to the same standard. Tanking is a specialist skill, and it's worth specifically asking any quote for wet room experience and examples of previous work — a poorly tanked wet room is one of the few bathroom mistakes that can cause structural damage, not just a look you don't love.
Generally no, for a straightforward conversion of an existing bathroom or en-suite. If the work involves structural changes, altering drainage significantly, or is in a flat with shared drainage, it's worth checking with your local authority or contractor before starting.
Not necessarily, but it's worth thinking through. The main resale consideration is losing the only bath in a family-oriented property. If resale to families isn't a priority, or you have another bathroom with a bath elsewhere in the house, this concern is largely academic.
Already decided on a wet room? See Wet Room Ideas, How Much Does A Wet Room Cost, and How Long It'll Take to fit one.
