Quick Answer

Wet Room vs Traditional Bathroom in London: Which Is Better?

Traditional bathrooms with bath plus shower are better for resale on family homes and most London property types. Wet rooms (fully tanked, floor-level shower, no tray) are 25-35% more expensive due to additional tanking and gradient screed but win on space efficiency in bathrooms under 5m² and on accessibility. Most London homes benefit from at least one traditional bath for family resale value.

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How wet rooms and traditional bathrooms differ

A traditional bathroom has a defined wet zone — bath, shower tray and basin area — separated from dry zones by walls and shower screens. Waterproofing is applied to those wet zones only; the wider room is constructed and finished as a regular interior. A wet room has the entire floor area tanked and waterproofed to the same standard as a shower base, with a gradient screed falling toward a central or linear drain, no shower tray, often no separating screen, and tiled or stone surfaces throughout the room treated as wet zones. The construction difference is significant: wet rooms require deeper floor build-up to accommodate the falling screed and drainage, often requiring joists to be notched and reinforced; tanking material costs and installation labour are 2-3× higher than for a traditional bathroom; tile selection is restricted to slip-resistant finishes.

Cost comparison

A like-for-like 4m² London bathroom in 2026: traditional construction £8,500-£14,000; wet room construction £11,500-£18,500. The wet room premium is typically £2,500-£4,500, attributable to deeper floor build-up (£500-£1,200), additional tanking membrane (£600-£1,200), gradient screed (£400-£800), linear drainage system (£250-£600), waterproofing labour (£400-£800), slip-resistant tile selection (£300-£800). On a 6m² bathroom the premium is £3,500-£6,000; on 8m² wet rooms £5,500-£9,000. The premium scales with floor area because of the tanking and screeding cost. Wet rooms are most cost-effective in compact spaces (under 5m²) where the lack of shower tray and screen frees enough floor area to justify the construction premium.

Resale value impact

London estate agents are clear: family homes with only a wet room as the primary bathroom typically suffer 1-3% price down-valuation on sale relative to the same home with a traditional bath plus shower combination. Family buyers consistently value a bath for young children, infants and resale flexibility. Wet rooms add value only where they are an additional bathroom (master ensuite, second bathroom) alongside at least one traditional bath in the property; in that role they add £6,000-£12,000 in perceived value to a typical Wandsworth or Hackney 3-bed terrace. Flats designed for couples or singles (one-bed and two-bed flats in central London) are largely indifferent between wet room and traditional construction. Always consider the target buyer profile for your specific street and property type before choosing wet room as the only or primary bathroom.

Related questions answered.

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Are wet rooms accessible for elderly or mobility-restricted users?

Yes — wet rooms are the gold standard for accessible bathing because of the level floor (no step over a bath rim or shower tray), wide door access, grab rails, fold-down seats and wide turning radius for wheelchairs. Wet rooms are the recommended construction for Care & Repair grants and Disabled Facilities Grants (DFG) in England, with up to £30,000 available for accessibility adaptations. If you are converting a bathroom for ageing-in-place reasons, a wet room is the most future-proof choice and often qualifies for zero-rated VAT on the works under VAT Notice 701/7 if the homeowner has a qualifying disability.

Do wet rooms leak more than traditional bathrooms?

When constructed correctly, no. Wet rooms have more extensive waterproofing than traditional bathrooms (full floor tanking vs zone tanking), and a correctly installed wet room is no more leak-prone than a correctly installed traditional bathroom. Leaks arise from poor workmanship rather than from the wet room concept itself. Common construction issues that cause leaks: inadequate gradient screed (insufficient fall to drain), poor membrane lap joints at floor-wall junction, untreated screw penetrations through the tanking, drain installed level with the screed rather than slightly below. Always insist on a 24-hour flood test before tiling — fill the floor to 5mm depth with the drain capped and check for water egress over 24 hours; this catches 90% of installation failures before they are buried under tile.

Can I have a wet room in a London flat?

Yes, but with restrictions. Wet rooms in flats require freeholder consent under most London leases because of the change to floor build-up depth and the increased water-leak risk to flats below. Lower-floor leakage from a wet room into a downstairs flat is one of the most common London building insurance claims and freeholders are sensitive to it. Most freeholders will require: full Schedule of Works, structural engineer sign-off on floor build-up, contractor insurance evidence, 24-hour flood test before completion, and sometimes a deed of variation to the lease specifying responsibility for any future leak. Approval typically takes 6-10 weeks and requires £300-£900 in landlord fees plus legal.

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