Bathroom Cost Calculator

Bathroom renovation costs range from £3,000–£6,000 for a basic refit (replacing suite, re-tiling, keeping layout) to £8,000–£15,000 for a mid-range project (new suite, full re-tile, updated plumbing, heated towel rail) and £15,000–£25,000+ for a luxury finish (freestanding bath, walk-in shower, underfloor heating, bespoke tiling).

Key cost drivers include: whether the layout changes (moving waste pipes and water supply adds significantly to plumbing costs), the specification of sanitaryware and tiling, and whether structural work is needed (such as strengthening the floor for a cast-iron bath). A standard bathroom refit takes 1–2 weeks.

Enter your bathroom size, specification level and scope. The calculator estimates costs for the suite, tiling, plumbing, electrics (extractor fan, heated mirror, underfloor heating), flooring and labour. Any electrical work in a bathroom must comply with Building Regulations Part P and be done by a qualified electrician.

UK bathroom costs 2026. Basic refresh (replace suite, retile): £2,500-£5,000. Mid-range full refit: £5,000-£12,000. Luxury master bathroom: £12,000-£30,000+. Per m²: £1,500-£4,000 typical. Average UK bathroom refit 2026: £6,500 (Which? survey). Sample 2.5m × 2m (5 m²) standard bathroom: £5,000-£12,500 depending on quality. Cost breakdown: 25% suite (bath, basin, WC, taps); 20% tiles and walls; 20% labour (3-5 day plumber + tiler); 15% extras (heated towel rail, lighting); 20% finishing.

Suite costs and choices. Bath: £150-£1,500 (steel enamel cheap, freestanding cast iron premium). Shower enclosure: £200-£2,000 (frameless glass + tray). Walk-in shower (no door): £500-£3,000 fitted. Wet room (fully tanked, level floor): £3,000-£8,000 extra. Basin and vanity: £150-£2,000. WC: £100-£800 (concealed cisterns more premium). Taps and shower fittings: £100-£1,500. Brand: Bristan, Mira, Triton mid-range; Hansgrohe, Grohe, Vado premium.

Tiles and walls. Ceramic wall tiles: £15-£40/m². Porcelain (better quality, more durable): £25-£70/m². Natural stone (marble, slate): £40-£120/m². Mosaic feature: £30-£200/m². Large-format porcelain (600×600+): premium look. Grouting cost: £100-£300 of grout/adhesive per typical bathroom. Half-tile + half-painted wall: saves 30-40% on tile cost vs full-height tiling. Wet area tiling: full-tile mandatory in shower zone — water-resistant adhesive and epoxy grout for waterproofing.

Plumbing and water pressure. Mains pressure (combi boiler): 1-3 bar typical UK. Power shower needs 2 bar minimum. Pump system: £200-£500 added cost for low-pressure homes. Thermostatic mixer: essential safety feature (prevents scalding from boiler temperature spikes) — £150-£400. Heated towel rail: £50-£500 + plumber install £100-£200. Underfloor heating (electric): £40-£80/m² fitted + electrician — adds £400-£800 to bathroom cost but transforms comfort.

Where to save and splurge. Save: budget tiles in inconspicuous areas (toilet wall); standard white sanitaryware (timeless, easy to replace fitting later); B&Q/Wickes own-brand fixtures (reliable, 50-60% cheaper than designer). Splurge on: shower mixer/valve (most-used, leaks here cost most); waterproofing/tanking in wet areas; tile quality on shower wall (touched daily). Heat: heated towel rail is transformative, low cost (£100-£200 fitted). Bathroom fan: vital — extractor with humidity sensor £80-£200; prevents mould requiring £500-£2,000 future remediation.