Bathroom Cost Calculator UK 2025

Estimate your bathroom renovation cost by size, quality and specification. Includes wet rooms, underfloor heating and walk-in showers. Completely free.

Bathroom renovations cost anywhere from £3,000 for a basic suite replacement to £20,000 or more for a luxury wet room with underfloor heating and designer fittings. The biggest variables are the quality of sanitaryware, whether you are changing the room layout, and whether you need new plumbing and electrics.

A straightforward like-for-like swap — new bath, toilet, basin, and tiling in the same positions — keeps costs down because existing pipework and waste connections can be reused. Moving a toilet or adding a walk-in shower where there was not one before means more plumbing, more floor preparation, and potentially more building regulation involvement.

The Bathroom Manufacturers Association estimates that UK homeowners spend a combined £7.7 billion on bathroom products each year, with the average renovation costing between £6,000 and £8,000 (BMA). Getting a clear budget figure before you start shopping prevents overspending.

How this calculator works

  1. Select your bathroom size, quality level, and type (standard, en-suite, or wet room).
  2. Add optional upgrades like underfloor heating, walk-in shower, heated towel rails, or premium tiling.
  3. The tool calculates a cost estimate broken down by sanitaryware, tiling, labour, and extras.

Written by the CalcStack team · Last updated April 2026

Bathroom specification

Extras

Frequently asked questions

How much does a new bathroom cost in the UK?
A new bathroom in the UK costs between £3,000 and £35,000+ depending on size, quality and specification. Budget: £3,000-£5,000, Mid-range: £5,000-£10,000, Premium: £10,000-£18,000, Luxury: £18,000-£35,000+. These include the suite, tiling, plumbing and labour.
How long does a bathroom renovation take?
A straightforward bathroom renovation takes 1-2 weeks. A full gut-and-refit with plumbing changes takes 2-3 weeks. A wet room conversion or structural changes can take 3-4 weeks. Plan for the bathroom to be out of use for the full duration.
How much does a wet room cost?
A wet room adds £2,000-£4,000 to the cost compared to a standard bathroom. This covers: tanking (waterproof membrane for floor and walls), a linear drain or centre drain, a gradient floor (typically formed with screed), and waterproof tiling. Wet rooms are ideal for smaller spaces and accessible design.
Is underfloor heating worth it in a bathroom?
Electric underfloor heating in a bathroom costs £1,000-£2,000 installed and adds luxury feel plus eliminates the need for a radiator, freeing wall space. Running costs are low (typically £20-£40/year for a bathroom). It is particularly worth it with tile or stone floors which feel cold without it.
How much does a walk-in shower cost?
A walk-in shower costs £1,500-£4,000 including the glass screen, shower tray (or wetroom floor), and installation. Frameless glass screens cost more (£500-£1,500) than framed (£200-£500). A rain shower head adds £200-£800. Walk-in showers are popular for their modern look and ease of cleaning.
What adds the most value to a bathroom?
The best value improvements are: good quality tiling (floor to ceiling), a walk-in shower, underfloor heating, good lighting (including a backlit mirror), and quality brassware (taps and shower). A well-designed bathroom can add 4-5% to property value. Avoid over-specifying for the property type.
Do I need building regulations for a bathroom?
Building regulations may apply for: electrical work in bathrooms (must be done by a Part P registered electrician or inspected), structural changes, new waste pipe runs or soil pipe connections, and ventilation requirements (extractor fan if no opening window). A like-for-like replacement usually does not need approval.
How much does bathroom tiling cost?
Bathroom tiling costs £25-£80/m² for supply and fit depending on tile type. Budget ceramic: £10-£20/m² for tiles plus £25-£40/m² for fitting. Porcelain: £20-£40/m² plus fitting. Natural stone: £40-£100/m² plus fitting. A typical bathroom needs 15-25m² of tiling.
Freestanding bath vs built-in: which is better?
Freestanding baths cost £500-£5,000 and create a focal point, but need more floor space and exposed pipework. Built-in baths cost £200-£1,500 and are practical with storage underneath, but look more standard. For small bathrooms, built-in is more space-efficient. For larger bathrooms, freestanding adds the wow factor.
Can I renovate a bathroom myself to save money?
Some tasks are DIY-friendly: painting, fitting accessories, replacing taps, and basic tiling. However, plumbing should be done by a qualified plumber, electrical work must be Part P compliant, and tanking for wet rooms requires specialist skills. A badly waterproofed bathroom can cause thousands in damage to floors below.

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