Wet Room vs Walk-In Shower: Which Costs More?

A walk-in shower (low-profile tray, glass screen, mixer) typically adds £900-£1,800 to a standard bathroom refit. A wet room, a fully tanked floor with linear drain, no tray, no enclosure barrier, typically adds £2,800-£5,500 over a standard refit, and £4,000+ on a suspended timber floor.

The gap is the tanking: a wet room needs the entire wet zone (and ideally the whole floor) waterproofed with a membrane system, plus a slope built into the floor. A walk-in shower contains the water in a tray.

Wet rooms are the right answer for: very small bathrooms where a tray would dominate, accessible/level-access requirements, and design-led en-suites where the seamless look is the point. They're not the right answer just because you saw one on Instagram.

Walk-ins are the right answer when: you want shower-only feel without the cost or commitment, you have a suspended timber floor (much less risk), and you may want to sell the house in the next 5 years (more buyer-friendly than full wet rooms in family homes).

The walk-in figure above assumes the shower goes where the old one was, or where the bath was, with the waste close by. What pushes a walk-in shower towards the top of its range is the same list every time: a larger low-profile tray that needs the waste moving, a thicker frameless screen, a thermostatic valve set into the wall rather than surface mounted, and tiling the full height of the wet area rather than a splashback.

What keeps it down is leaving the pipes where they are, choosing a standard tray size and keeping existing sound tiles outside the shower zone. If you are replacing a bath, remember the wall behind it usually needs making good, and that belongs in the quote from the start rather than appearing as an extra.

For a wet room, the floor decides the price. On a solid ground floor the former can often be recessed with relatively little work. On a suspended timber floor, which is common in older Gloucestershire houses, the joists need checking and the former has to be built into the floor, which is why the timber-floor figure starts higher.

Because the whole floor is tanked, the waterproofing is a bigger share of a wet room quote than of a walk-in one. A quote that is noticeably cheaper than others usually has less tanking in it, not a better price on the same work. Ask any fitter to show where the membrane stops.

Put the quotes side by side and check they cover the same things: removal of the old bath or shower, any waste relocation, the full tanking area, the tray or former, the screen, the valve, the tiled area and the extractor. Most of the gap between a cheap quote and a realistic one is in the items missing from the cheap one. We survey first and itemise every quote so you can see exactly what is included.

Wet rooms need an extractor sized properly for the whole-room moisture load, usually a humidity-sensing in-line unit, £200-£400 fitted. They typically need re-tanking and re-tiling sooner than a walk-in (10-15 years vs 20+) because the floor sees daily soaking. Insurance: tell your insurer; some require notification.