How Much Does a Bathroom Renovation Cost?

Understanding bathroom renovation costs

A new bathroom is the project most people underestimate. The suite itself is rarely the problem. It’s the plumbing moves, the tiling, the waste runs, and the week you can’t use your own shower. Knowing where the money actually goes makes every other decision easier, whether you’re choosing tiles or reading a quote from a plumber. Here’s how bathroom costs break down in the UK right now.

Suite costs: Budget, Mid-range, and Premium

The suite (toilet, basin, bath, shower, and taps) is the most visible cost and the easiest to shop. Prices shift with brand, material, and where you buy.

Budget: £400 to £900 for the full suite. Own-brand ranges from the big merchants, acrylic bath, ceramic basin on a pedestal, thermostatic shower valve with a fixed head. Fine for a rental, a cloakroom, or a careful first renovation. Expect to replace the shower valve in 5 to 8 years.

Mid-range: £1,200 to £2,500.Recognisable brands (Roca, Ideal Standard, Hansgrohe entry-level), steel bath instead of acrylic, wall-hung basin with a cabinet, riser rail shower. This is where most UK family bathrooms land, and where the Houzz 2024 UK Bathroom Study put median spend at £5,300 on suite and fittings combined.

Premium: £3,500 to £8,000+. Designer brands, freestanding bath, stone or concrete basin, digital shower controls, heated towel rail plumbed off the main heating circuit. Adds 2 to 3 days to the install because the fixings and tolerances are tighter.

Plumbing and labour: the part that eats quotes

Labour is the cost most quotes underestimate, and it’s the one a calculator can actually sense-check for you.

If your new layout keeps the toilet, bath, and basin where they currently sit, plumbing labour stays contained (usually 2 to 3 days at £250 to £350 per day). Move the toilet across the room and you’re rerouting soil pipes, cutting joists, and quite possibly pulling up the floor downstairs too. That can add £800 to £2,000 on its own.

Swapping a bath for a walk-in shower sounds simple. In practice it means rebuilding the floor fall, adding a linear drain, and waterproofing properly. Budget 1 to 2 extra days of labour plus materials.

When you’re reading a plumber’s quote, look for line-item breakdowns: first fix, second fix, waste runs, isolation valves. A quote that bundles everything into one number is harder to compare, and harder to query when something changes mid-job. If the total sits more than 25% above the Mid-range figure this calculator gives for your postcode, it’s worth asking why.

Tiling considerations

Tiling is where small choices compound. A standard UK family bathroom has 12 to 18 m² of tiled surface once you cover walls around the bath and shower plus the floor. Full-height tiling everywhere pushes that to 25 m² or more.

Material cost per m²:ceramic £15 to £40, porcelain £30 to £80, natural stone (marble, travertine) £60 to £150+, large-format porcelain (600×1200 and up) £50 to £120.

Labour cost per m²:£40 to £70 for straight ceramic, £60 to £100 for large-format or patterned work, £80 to £140 for natural stone or herringbone. London and the South East sit at the top of those ranges.

Always order 10% to 15% extra for wastage, and 20% if you’re laying diagonal or chevron patterns. Under-ordering means paying delivery twice and risking a batch mismatch on the second run.

Hidden costs that catch people out

The line items missing from most quotes:

Waste disposal.A skip for a bathroom strip-out runs £250 to £400 for a 4-yard, more in London. Permit fees apply if it sits on the road.

Electrical work.New extractor fan, shaver socket, underfloor heating, or shower circuit all need a qualified electrician under Part P of the Building Regulations. Expect £300 to £800 for typical electrical on a bathroom refit.

Waterproofing (tanking).Wet areas behind tiles need a proper tanking system, not just tile adhesive. Add £150 to £400 for materials and an extra half-day of labour. Skipping this is why tiles fall off in year three.

Plastering.Old walls rarely come out clean behind a stripped-out bathroom. Re-skim at £200 to £500 depending on condition and room size.

Building Control sign-off.If you’re adding a new bathroom where there wasn’t one, or making changes to drainage, you may need Building Control approval. Roughly £150 to £400 in fees.

DIY limits: what you should never touch

Doing your own tiling or painting is reasonable if you have the patience. A short list of things to leave to qualified trades, regardless of budget:

Electrics in bathrooms. Part P of the Building Regulations covers all electrical work in zones near baths and showers. A competent-person-registered electrician can self-certify. An unregistered installation is a legal problem when you come to sell the house, and a real safety problem in the meantime.

Unvented hot water cylinders. Installation, modification, or relocation is notifiable work. You need a G3-qualified installer, full stop.

Soil stack and waste modifications.Getting the fall wrong on a waste run means recurring blockages or smells that no amount of cleaning fixes. If you’re moving the toilet or rerouting waste, that’s a plumber’s job.

Gas work. If your boiler is coming out or moving to accommodate the new layout, only a Gas Safe engineer can touch it. Always.

Everything else (demolition, painting, fitting accessories, straightforward tiling) is fair game if you have the time and the tools. Just factor your hours honestly. A DIY tiler will take three times as long as a pro, and most people only realise that halfway through.