UK wet room guidance

Wet rooms, explained without the sales pitch

What a fully tanked, level-access wet room really costs, how the tanking and drainage falls work, how a wet room compares with a shower room, and whether one suits your home. Every figure is a range, with its source.

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£5k–£10k+ typical full wet room£500–£1,000 tanking & waterproofingLevel access no tray, no step
Cited sourcestrade cost guides & UK building regsRanges, not promisescosts depend on your roomVetted installerschecked & introduced

In 40 seconds

Installing a fully tanked, level-access wet room in the UK usually costs roughly £5,000–£10,000 for a full wet room, with many projects landing around £1,500–£3,500 per square metre depending on floor build-up, the waterproofing method and how easily the waste can be routed. The waterproofing itself — the tanking — is typically £500–£1,000 in membrane and specialist labour, and the floor needs a built-in drainage fall of roughly 10–20mm per metre (about a 1:40 slope) so water runs to the drain rather than pooling. A small wet room of around 3m² often falls in the £3,000–£5,000 range. The honest answer is always a range, because it depends on your room size, subfloor and finish.

Most wet room guidance is published by companies fitting them, so the numbers tend to be optimistic and the technical rules glossed over. The pages below give honest cost ranges, explain how tanking and drainage falls actually work, compare a wet room with a shower room fairly, and set out whether a wet room suits your home — before you take a single quote. This site covers fully tanked, level-access wet rooms only.

£5k–£10k+
typical full wet room
£1.5k–£3.5k/m²
common rate
£500–£1,000
tanking & waterproofing
10–20mm/m
drainage fall

Cost & pricing

What a fully tanked, level-access wet room actually costs in the UK.

Cost

How much does a wet room cost in the UK?

Typical full-room and per-square-metre ranges, what tanking, drainage and tiling each add, and why room size and subfloor move the number.

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Comparison & choosing

How a wet room compares with a conventional shower room.

Vs shower room

Wet room vs shower room — which should you choose?

How a fully tanked level-access wet room differs from an enclosed shower room on cost, water control, cleaning and the feel of the space.

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Tanking & waterproofing

How a wet room is waterproofed, and what it costs.

Tanking

How much does wet room tanking cost, and how does it work?

What tanking is, how the membrane and drainage falls are formed on timber and concrete floors, and the typical cost of getting it right.

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Small wet rooms

What a small or compact wet room costs and needs.

Small wet rooms

How much does a small wet room cost, and does it work?

Typical cost of a compact wet room, why a small room needs careful ventilation and a screen, and where a tight floor plan helps or hurts.

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Suitability & decision

Whether a wet room is a good idea for your home.

Good idea?

Are wet rooms a good idea?

The honest pros and cons of a fully tanked level-access wet room — the open feel and easy cleaning against spray, warmth and resale considerations.

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How it works

Guidance first. Quotes only if you want them.

We publish sourced answers on wet room costs, tanking and waterproofing, how a wet room compares with a shower room, and whether one suits your home, then — if you'd like prices — match you with a vetted wet room installer who surveys your room and quotes on a clear specification. Costs are always shown as ranges that depend on your room. No obligation, and you decide whether to proceed.