How Much Does a Bathroom Renovation Really Cost?
You've seen the Pinterest boards. You've measured the room three times. Now you need to know what it'll actually cost - and where the money really goes. Here's an honest breakdown from budget refreshes to full gut-and-replace jobs.
Sarah Mitchell
Written by Sarah Mitchell, home improvement specialist
The short answer
A standard UK bathroom renovation costs £4,500–£9,000 for an average-sized room. Budget refreshes start around £2,500. High-end refits with underfloor heating and walk-in showers can reach £15,000–£20,000.
Why bathroom costs vary so wildly
Two bathrooms of the same size can cost vastly different amounts. The difference comes down to three things: the fixtures you choose, whether you're changing the layout, and where you live.
A like-for-like swap - new bath in the same spot, new basin in the same spot, new toilet in the same spot - is far cheaper than rearranging everything. The moment you move a toilet or add a shower where there wasn't one, the plumber needs to reroute waste pipes and water supply lines. The Chartered Institute of Plumbing and Heating Engineering (CIPHE)recommends always using a qualified plumber for any work involving waste pipes or water mains. That's where costs jump.
Regional differences matter too. Labour rates in London and the South East run 20–40% higher than the Midlands or the North. A bathroom that costs £5,000 in Leeds might cost £7,000 in Guildford for identical work.
The full cost breakdown
Here's where your money actually goes. These figures assume an average-sized bathroom (roughly 2.4m x 1.8m) and include both labour and materials unless stated otherwise.
| Item | Budget | Mid-range | Premium |
|---|---|---|---|
| Strip out and disposal | £300–£600 | £400–£700 | £500–£800 |
| Plumbing (labour) | £600–£1,000 | £800–£1,500 | £1,200–£2,000 |
| Tiling (labour + materials) | £400–£800 | £800–£1,500 | £1,500–£3,000 |
| Bathroom suite | £300–£600 | £700–£1,500 | £2,000–£5,000 |
| Electrics | £200–£400 | £300–£600 | £500–£1,200 |
| Flooring | £150–£300 | £300–£600 | £600–£1,200 |
| Plastering and prep | £200–£400 | £300–£500 | £400–£700 |
| Decoration and finishing | £100–£200 | £200–£400 | £400–£800 |
| Total estimate | £2,250–£3,300 | £3,800–£7,300 | £7,100–£14,700 |
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The hidden costs nobody warns you about
Every bathroom renovation forum is full of people saying it cost more than they expected. These are the extras that catch people out:
- Asbestos in old Artex ceilings or floor tiles. Testing costs £30–£50, but removal by a licensed contractor adds £300–£800 depending on the area affected.
- Rotten floorboards or joists. Common in older houses with long-standing leaks. Replacing a section of bathroom floor costs £200–£500.
- Outdated plumbing. Lead or iron pipes need replacing for safety and insurance reasons. Budget £400–£800 for replumbing a bathroom.
- Electrical upgrades. If your bathroom doesn't have an RCD-protected circuit (required since 2005), an electrician will need to upgrade your consumer unit. That's £200–£400.
- Ventilation requirements. Building Regs require mechanical extraction in bathrooms without openable windows. A decent extractor fan with ducting costs £150–£300 fitted.
Three real bathroom renovation scenarios
Scenario 1: Budget refresh (£2,500–£4,000)
You keep the layout. New bath panel, new toilet seat, replace the basin and taps, retile the splash areas, fresh paint. The bath stays if it's in decent condition. You handle the strip-out and painting yourself.
This is the sweet spot for anyone selling a house or renting out a property. It freshens up a tired bathroom without the cost of moving plumbing.
Scenario 2: Full mid-range refit (£5,000–£8,000)
Everything out, everything new. A decent bathroom suite from the likes of Roca or Ideal Standard. Full floor-to-ceiling tiling on at least two walls. New flooring (vinyl plank or porcelain tiles). Heated towel rail. Chrome shower with a glass screen rather than a curtain.
This is what most homeowners go for. The layout stays broadly the same, but everything is new and modern. It's the renovation that adds genuine value to your home.
Scenario 3: Premium renovation (£10,000–£18,000)
Layout changes. Walk-in shower with a wetroom-style floor. Wall-hung toilet and vanity unit. Underfloor heating. Large-format porcelain tiles. Niche shelving. LED mirror cabinet. Smart shower with thermostatic controls.
The cost here is driven by the layout change (moving plumbing), underfloor heating installation, and the fixtures themselves. A wall-hung toilet frame alone costs £200–£400 before fitting.
Where to save without cutting corners
There are genuine ways to bring the cost down without ending up with a bathroom you hate:
- Do the strip-out yourself. Ripping out an old bathroom isn't skilled work - it's just grafting. You'll save £300–£600 in labour.
- Keep the layout. Every pipe you move adds cost. If the current layout works, keep the toilet, basin, and bath in the same positions.
- Buy your own bathroom suite. Plumbers mark up suites by 10–20%. Buy directly from Victorian Plumbing, Better Bathrooms, or even Screwfix and have it delivered before your fitter starts.
- Choose larger tiles. Fewer tiles means fewer cuts and less labour time. A 600x300mm tile is cheaper to lay than a mosaic.
- Paint above the tile line. Full floor-to-ceiling tiling looks great but costs a fortune. Tile the wet areas and paint the rest with proper bathroom paint.
Do you need Building Regulations approval?
For a straightforward bathroom refit, you don't need planning permission or Building Regulations approval. But there are exceptions:
Any new electrical work in a bathroom must comply with Part P of the Building Regulations. Your electrician should either be registered with a competent person scheme (like NICEICor NAPIT) or you'll need to apply for Building Control approval separately.
If you're creating a new bathroom where there wasn't one before (converting a bedroom, for example), you will need Building Regulations approval for the drainage, ventilation, and structural changes. You can read more about Building Regulations approval on gov.uk.
Frequently asked questions
How much does a bathroom renovation cost in the UK?
A standard bathroom renovation in the UK costs between £4,500 and £9,000 for an average-sized room. A budget refresh starts around £2,500, while a high-end renovation with underfloor heating and premium tiles can reach £15,000–£20,000.
What is the biggest hidden cost in a bathroom renovation?
Plumbing changes are the most common unexpected cost. Moving a toilet, shower, or basin from its current position can add £500–£2,000 to the bill because it requires new pipework, waste runs, and sometimes floor-level changes.
How long does a bathroom renovation take?
A straightforward like-for-like bathroom refit takes 5–7 working days. If you're changing the layout, adding an en-suite, or dealing with structural work, expect 2–4 weeks.
Can I save money by doing some bathroom work myself?
Yes. Stripping out the old bathroom yourself can save £300–£600 in labour. Painting and tiling are also DIY-friendly if you have some experience. However, plumbing and electrics should always be done by qualified tradespeople - Part P regulations require a certified electrician for bathroom electrics.
Planning a bathroom renovation?
See the full cost guide for bathrooms with regional breakdowns and price ranges for every type of work.
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