How much does a bathroom renovation cost in the UK?

A bathroom renovation in the UK typically costs between £5,000 and £15,000, with higher-spec projects reaching £20,000 and above.

In London, most projects fall between £5,000 and £20,000, with an average of around £8,000.

The range is smaller than kitchens, but variation still comes down to scope.

Layout, plumbing, fixtures, and finishes all affect the final cost.

The key is not just knowing the average. It is understanding what drives the cost and planning properly before you start.

If you are early in the process, see our guide on how to plan a bathroom renovation.

Bathroom renovation cost (UK): typical ranges

Most bathroom renovations fall into three broad ranges.

£5,000 to £8,000 (basic) Replace fixtures like-for-like, minimal layout changes, standard finishes.

£8,000 to £15,000 (mid-range) New bathroom suite, improved layout and storage, better quality finishes.

£15,000 to £25,000 and above (high-end) Premium fixtures and fittings, design-led finishes, higher-spec materials.

These ranges assume no major structural changes.

Bathroom renovation costs in London

Bathroom renovation costs in London are typically higher than the UK average.

As a guide: £5,000 to £20,000 total range, with an average project cost of around £8,000. Higher labour costs and tighter working conditions are the main drivers.

If your project is in London, budget at the higher end of UK ranges.

What drives the cost of a bathroom renovation

Bathroom costs are driven by a small number of key factors.

Plumbing changes Moving pipework increases cost quickly. Keeping the layout the same is more cost-effective.

Size of the bathroom A typical UK bathroom is around 2m x 2m, but larger spaces increase costs across the board.

Fixtures and fittings Costs vary widely. Baths range from around £80 to £3,000, showers from £50 to £2,000 and above, and toilets from £50 to £500 and above.

Tiling and finishes Tiles typically cost around £85 per m² and can significantly affect total spend.

Labour and complexity Bathrooms require multiple trades working in a small space, which increases cost.

Small changes across these areas can move a project from £6k to £20k and above.

What most people get wrong about bathroom costs

Most cost overruns are caused by changes during the build.

Common issues include moving plumbing after work starts, upgrading fixtures late, underestimating tiling and finishes, and uncovering hidden issues such as pipes, damp, or electrics.

Bathrooms are tightly constrained spaces. Small changes have a big impact.

This is why quotes often vary. Before comparing quotes, it helps to understand how the Beams process works and how we ensure every builder is pricing the same scope.

What your budget actually gets you

Understanding what different budgets deliver is more useful than averages.

Around £5,000 to £8,000: A basic replacement with standard fixtures and minimal layout change.

Around £8,000 to £15,000: A full renovation with better quality fittings and an improved layout.

£15,000 to £25,000 and above: A premium, design-led bathroom with higher-spec fixtures.

The right budget depends on how you want the space to function.

Why costs vary so much between quotes

Builders are often pricing different versions of the same project.

This happens when scope is not clearly defined, fixtures and finishes are not specified, and assumptions differ. This is why one quote may appear much cheaper than another.

Across Beams projects, the cheapest quote wins 44% of the time, while the most expensive wins 40%. Price alone is not a reliable signal of value.

How to budget for your bathroom renovation

Start with clarity, not guesswork.

Set a realistic range. Use cost bands to understand what is achievable.

Define your scope early. Lock in layout, fixtures, and finishes before speaking to builders.

Keep plumbing in place where possible. This reduces cost and complexity.

Allow contingency. Set aside 10 to 20% for unexpected costs.

Compare properly. Make sure quotes are based on the same assumptions.

For a full pre-renovation checklist, see our home renovation checklist.

Why this is difficult to do alone

Bathroom renovations involve tightly connected decisions.

Changing one element affects layout, plumbing, and cost. Without experience, it is difficult to define a complete scope, understand trade-offs, or compare quotes confidently. This often leads to changes during the build, which increases cost.

If you are also renovating your kitchen, see how much a kitchen renovation costs.

How Beams helps

Beams helps you understand your bathroom renovation cost before you speak to builders.

We define the scope upfront, including layout, fixtures, and level of detail. We set realistic expectations on cost. We match you with the right builders for your project and line up up to three site visits.

Builders then quote based on the same information. That means you can compare quotes properly and choose with confidence.

Get a clear plan and cost before you start

The best way to control your bathroom renovation cost is to start with clarity.

Know what you are building and what it should cost. Then move forward with confidence.