A bathroom renovation is one of the smallest and fastest project types we run — typically 3–5 weeks on site, with a £8,000–£25,000 fixed price. It's also the project with the highest ratio of finishes-to-build: a sensible mid-range bathroom and a luxury one have similar labour days but very different supply costs. This guide breaks down 2026 bathroom prices by type, what drives the cost, and the most common ways homeowners overspend.
Bathroom renovation cost (London/M25 corridor, 2026).
| Project type | From | To | Notes |
|---|---|---|---|
| Cloakroom / downstairs WC | £3,500 | £8,000 | 2–3 days on site. WC, basin, tiles. |
| Small ensuite (≤4 m²) | £8,000 | £15,000 | Shower, WC, basin. 2–3 weeks. |
| Standard family bathroom (4–8 m²) | £10,000 | £18,000 | Bath, shower, WC, basin. 3–4 weeks. |
| Large family bathroom (8–12 m²) | £15,000 | £25,000 | Separate bath and shower, vanity. 4–5 weeks. |
| Wet room | £12,000 | £22,000 | Tanked floor, linear drain, glass screen. |
| Luxury master bathroom (12 m²+) | £22,000 | £60,000 | Freestanding bath, wet area, his/hers basins, UFH, premium tile. |
How regional cost varies (m² rates for the typical build).
| Region | From | To | Notes |
|---|---|---|---|
| Prime central London (W1, SW1, SW3, NW1) | £30,000 | £36,250 | Premium finishes and listed-building consent standard. |
| Inner London (SE/SW/E/NW/N inside South Circular) | £25,000 | £31,250 | Strong Article 4 / conservation-area constraints. |
| Outer London (Bromley, Bexley, Croydon, Sutton, Havering) | £10,000 | £25,000 | Mid-band labour rates, PD typically intact. |
| Kent / Surrey / Essex commuter belt | £9,500 | £27,500 | Affluent areas (Sevenoaks, Tunbridge Wells, Weybridge) sit near top. |
| Outer Kent / Essex / Hertfordshire | £8,500 | £23,750 | Below-London labour costs; longer logistics. |
Mid-range sanitaryware (Roca, Vitra, Ideal Standard): £1,200–£2,500 for a full set. Premium (Duravit, Villeroy & Boch, Lefroy Brooks): £3,500–£8,000. Luxury (Antonio Lupi, Boffi): £8,000–£20,000+.
Mid-range porcelain: £35–£60/m². Designer porcelain: £60–£120/m². Stone (marble, travertine, limestone): £80–£200/m². Large format (1200×600+): adds 20% labour. A standard family bathroom needs 25–35 m².
Mid-range (Hansgrohe Logis, Grohe Bauedge): £400–£800 for full set. Premium (Hansgrohe Metris, Vola): £1,200–£2,500. Luxury (Lefroy Brooks, Crosswater Belgravia): £3,000–£8,000.
Tanking system: £400–£800. Linear drain channel: £400–£800. Floor build-up to create 1:80 fall: £400–£800. Glass screen: £600–£1,500.
Electric UFH mat: £80–£140/m² supplied and fitted. Wet UFH (if zone is large enough to justify): £140–£220/m² + manifold.
Most bathroom layouts can stay where they are. Moving the soil pipe (toilet to a new wall) needs floor lifting and re-routing: £800–£1,800. Moving the bath to a different wall: £400–£800.
Bathrooms must have either an openable window or mechanical ventilation. A new MVHR or dMEV fan: £400–£800 supplied and fitted. Required under Building Regs Part F.
| Phase | Duration | Notes |
|---|---|---|
| Design + survey | 1 week | Layout drawings, material list. |
| Procurement | 4–8 weeks | Client orders tiles, sanitaryware, brassware. Most lead time on bespoke vanity units. |
| Strip-out | 2 days | Everything out, waste removed. |
| First fix | 4–6 days | Plumbing, electrics, ventilation, tanking, UFH. |
| Tile + plaster | 4–6 days | Wall and floor tiles, plaster to non-tiled surfaces. |
| Second fix | 3–4 days | Sanitaryware, brassware, screen, accessories. |
| Snagging | 1–2 days | Defects, certificates. |
For a typical £12,000 family bathroom in London: labour and materials £7k–£8k, tiles £1.5k–£2k, sanitaryware £1.5k–£2k, brassware £700–£1,200, vanity unit £500–£1,200. The single biggest cost lever is sanitaryware + brassware spec — the same labour hours fit a £1,500 set or a £5,000 set.
Wet rooms are 20–30% more expensive than traditional bathrooms because of the tanking, fall and linear drain. They look stunning but only work where the floor build-up allows the fall — typically suspended timber floors can struggle and may need stiffening or a step-up. Concrete floors are ideal. For most family bathrooms, a generous walk-in shower in a traditional layout delivers 90% of the visual benefit at 70% of the cost.
Two big overspends: (1) bespoke marble vanities and feature tiles that cost £4k–£8k versus an off-the-shelf vanity at £600 with similar visual impact; (2) luxury brassware (Lefroy Brooks, Vola) — beautiful but £2k–£5k more than premium Hansgrohe for similar function. The most cost-effective premium bathroom is a mid-range layout with one feature element (a freestanding bath, or a single statement tile).
Top mistakes from our delivery: under-spec'd extract fan (Part F requires 15 l/s for a bath, 6 l/s for a basin — many cheap fans don't meet this); skipping the tanking on the shower wall (the £150 tanking saves a £3k repair); using cheap silicone that goes black within 12 months; and putting a wall-hung WC on a stud wall without a proper carrier frame.
A modern, well-finished bathroom typically returns 50–70% of cost in resale value. The bathroom is a key viewing trigger — buyers will mentally subtract the full replacement cost of a tired bathroom from their offer, even if it works fine. Investing £10k–£15k in updating a tired family bathroom usually pays back £8k–£12k in viewing-stage perception.
A standard family bathroom renovation in London costs £10,000–£18,000 in 2026 for a 4–8 m² room. That includes labour and materials, plus client-supplied tiles, sanitaryware and brassware.
A small ensuite (≤4 m²) costs £8,000–£15,000 in London in 2026. Most of the cost is fixed (plumbing, electrics, tanking, tiling) so smaller ensuites cost almost as much as full bathrooms.
Plan on 2–4 weeks on site for a standard family bathroom, 3–5 weeks for a wet room. Procurement of sanitaryware and tiles often takes longer than the on-site work — order 6–8 weeks ahead.
Any electrical work in a bathroom is Part P notifiable. Soil-pipe re-routing needs Building Control sign-off. Structural changes (e.g., moving a load-bearing wall) need full Building Control approval. Most bathroom renovations only need Part P self-certification.
A cloakroom / downstairs WC at £3,500–£8,000 is the cheapest. For a full bathroom, the cheapest sensible spec is around £8,000 — below that you're cutting corners on the things you can't see (plumbing, electrics, tanking) that cause leaks within 2 years.
Wet rooms are 20–30% more expensive but look stunning. They work best on concrete floors with adequate build-up for fall and drainage. For most family bathrooms, a generous walk-in shower in a traditional layout delivers similar visual impact at lower cost.
Keep the existing layout (avoid moving the soil pipe), choose mid-range sanitaryware over premium, use porcelain tiles rather than natural stone, and supply your own materials rather than buying through the builder.
The numbers above are real averages — but every project is different. Use our 60-second instant quote, configure your project in detail, or book a free site visit for a fixed written quotation in 5 working days.