Quotes for the same small bathroom can vary by thousands, which makes budgeting feel like guesswork. Here is a straight answer on what a small bathroom refit actually costs in the UK, where the money goes, and how to plan sensibly before you commit.
For a small bathroom (roughly 2m x 2m, the kind you find in many Wallington terraces and 1930s semis), a full renovation typically lands between £6,000 and £12,000 including labour, fittings and materials. A straightforward refresh keeping the existing layout sits at the lower end, while moving plumbing, fitting underfloor heating or choosing premium tiles pushes towards the top.
Labour usually accounts for around half to two thirds of the total. In south London, expect a small bathroom to take a fitter one to two weeks of work, and day rates here run higher than the national average, which is worth factoring in when you compare quotes from online cost calculators.
Understanding the breakdown helps you spot a fair quote from an inflated one. The suite itself (toilet, basin, bath or shower) is often a smaller slice than people expect; the labour-heavy trades and finishing materials are where costs build up.
Tiling is the single biggest variable after labour. Wall-to-ceiling tiling in a small room can mean 15 to 25 square metres once you account for cuts and waste, and porcelain at £40 to £70 per square metre adds up quickly compared with budget ceramics.
The biggest cost driver is moving things. Keeping the toilet, basin and bath in their existing positions avoids re-running waste pipes and chasing walls, which can save well over £1,000. Relocating the soil pipe or converting a bathroom into a walk-in shower is where budgets jump.
Older Wallington properties bring their own surprises. Lifting old flooring can reveal rotten joists or perished pipework, and solid walls often need replastering rather than a quick skim. A good fitter will flag these risks before starting and build a sensible contingency into the conversation rather than springing it on you mid-job.
Set aside a contingency of 10 to 15 per cent on top of your quoted figure, especially in a period property. Get at least two or three itemised quotes so you can compare like for like, and be wary of any price that comes in dramatically below the others, as it often signals cut corners on waterproofing or a thin allowance for fittings.
Decide your fittings before work starts. Choosing tiles and a suite halfway through causes delays and tempts upgrades that quietly inflate the final bill. A clear specification agreed up front is the single best way to keep the final cost close to the quoted one.
Most small bathrooms take one to two weeks from strip-out to finish. Layout changes, drying time for plastering and waiting on bespoke or out-of-stock fittings can extend this.
Yes, swapping a single fitting is far cheaper, often £800 to £2,000 depending on the item and any tiling around it. A full renovation only makes sense when the layout, pipework or general condition needs addressing.
A like-for-like refit usually needs neither. However, new electrical work and certain plumbing changes must comply with building regulations, so use a qualified electrician who can certify the work.