Bathroom Renovation Costs in London: Full 2025 Guide

Bathroom renovation costs are determined by six main factors: Size (in square metres — a typical London en-suite bathroom might be 3-4m2 while a family bathroom is 5-8m2); Specification (basic white sanitaryware versus designer brands; standard ceramic tiles versus large-format porcelain or natural stone); Whether it is a like-for-like refit (replacing existing sanitaryware in the same positions) or a reconfiguration (moving the toilet, bath, or shower to a new position — much more expensive because it involves relocating drainage and water supplies); Structural or dampness remediation works required (particularly relevant in older London properties); The condition and accessibility of existing services (old lead pipework or 15mm supply pipes may need upgrading); and finish expectations (particularly tiling — large format stone tiles are 3-4x the labour cost of standard ceramics).

Budget bathroom refit (like-for-like replacement, standard sanitaryware, ceramic tiles, 5-6m2): £4,000-£6,000 supply and install. This covers: removing existing suite; supplying and installing a new bath, WC, basin and vanity, shower enclosure, taps, and towel rail (standard specification); tiling walls behind the bath/shower and floor in standard ceramic; installing an extractor fan; first and second-fix plumbing; electrical work for the light, shaver socket, and fan; and making good. Mid-range bathroom renovation (minor reconfiguration, mid-spec sanitaryware and tiles, 5-7m2): £7,000-£12,000. High-end bathroom renovation (full reconfiguration, designer sanitaryware, large-format or stone tiles, underfloor heating, bespoke joinery, frameless shower): £15,000-£30,000+. En-suite bathroom renovation (smaller space, 3-5m2): Budget: £3,500-£5,000. Mid-range: £5,500-£9,000. High-end: £10,000-£20,000. Note: these figures are supply-and-install costs where the contractor both sources materials and provides labour. If you source sanitaryware and tiles separately, the material element of the above can be adjusted accordingly.

Plumbing is typically the single largest trade cost in a bathroom renovation. Costs depend heavily on: the existing pipe layout and material (copper plumbing in good condition is easier and cheaper to work with than old lead pipes or 15mm supplies that need upgrading); whether the waste drainage needs to be moved (moving a toilet requires extending the soil pipe — typically adding £300-£800 to the plumbing cost and requiring access to the floor structure below or a frame-and-build solution); the number of outlets (a bathroom with bath, separate shower, two basins, and a bidet has more connections than a basic bath-and-WC layout). Typical plumbing costs for a London bathroom renovation (labour only, materials separate): basic like-for-like bathroom plumbing: £800-£1,500; mid-range bathroom with some repositioning: £1,500-£2,800; full reconfiguration or complex drain relocation: £2,500-£4,500. Gas Safe and water regulations: all hot water work must comply with Water Regulations; thermal unvented cylinders must be installed by an approved person.

Tiling is the most visible finish element in a bathroom and has the widest cost range of any bathroom trade. Cost drivers: tile size (large-format tiles require more precision, more adhesive, more labour time and heavier substrate preparation — typically 30-60% more labour cost than standard 300x300 tiles); tile type (ceramic is cheapest to fix; porcelain is denser and harder to cut; natural stone requires sealing and careful substrate preparation; mosaic is very labour-intensive); substrate condition (solid sound walls: straightforward; uneven or hollow plaster: needs tanking board overlay first, adding £15-£25/m2); and floor tile grip requirements (bathroom floors need anti-slip rated tiles). Labour cost for tiling in a London bathroom: standard ceramic tiles up to 300x600mm: £30-£50/m2 labour only. Mid-range porcelain tiles 600x600 to 600x1200mm: £50-£90/m2 labour only. Large format tiles 1200mm+: £80-£130/m2 labour only. Natural stone: £90-£150/m2 labour only (includes sealing). Mosaic tiles: £80-£140/m2 labour only. For a 5-6m2 bathroom with full wall and floor tiling, labour alone typically ranges from £1,200-£2,500 for a standard specification and £3,000-£6,000+ for a high-end specification.

A well-organised bathroom renovation project in London typically follows this sequence: strip out and preparation (1-2 days); first-fix plumbing and electrics (1-2 days); substrate preparation and waterproofing (1-2 days — tanking and board overlay if required); tiling (3-10 days depending on size and tile specification); sanitaryware second-fix plumbing installation (1-2 days); second-fix electrical installation (half a day — lights, fan, shaver socket); snagging and finishing (1 day). Total project duration: 2-3 weeks for a standard bathroom renovation; 4-5 weeks for a large or high-specification project; or where bespoke elements (heated towel rail radiator system, underfloor heating, bespoke joinery) are included. Lead time for sanitaryware and tiles: budget 4-8 weeks for bespoke or made-to-order items; standard items from UK merchants are typically 1-2 weeks. Add 2-3 weeks to the programme for specification, procurement, and planning before any on-site work starts.