Bathroom Renovation in London

A straight swap-in-place refit takes about 1-2 weeks; a full renovation with new waterproofing, retiling, and any layout change takes 2-4 weeks. Add waiting time before the start for fixture delivery and trades scheduling — and note that waterproofing membranes need curing days you cannot compress.

Only in limited ways. Swapping a vanity, toilet, or taps in place works as standalone jobs, but anything touching the shower area, waterproofing, or tiling should be done in one hit — redoing tiles twice or breaking a waterproof membrane to add something later costs more than doing it together.

Relocating a toilet means rerouting the soil pipe and adjusting floor levels; moving a shower means new drainage falls and full re-waterproofing. Either typically adds a meaningful share of the total budget and extra days of work. If your budget is tight, keeping the existing layout is the single most effective cost-saver.

If the renovation strips the shower area back to the substrate, waterproofing must be redone — a failed membrane is the most expensive bathroom defect there is, because the fix means demolishing finished tiling. Several countries regulate wet-area waterproofing explicitly. Never let a contractor tile directly over an old or damaged membrane.

A bathroom renovation touches plumbing, electrics, waterproofing, tiling, and carpentry. A bathroom specialist or small contractor who coordinates all of it is usually worth the margin unless you have renovation experience — sequencing errors between trades (tiler before the plumber finished rough-in, for example) are the classic self-managed failure.

A like-for-like refit usually needs no permit in London, but moving drainage, altering walls, or adding a new bathroom typically does under your local building rules — and electrical and plumbing work must be done by qualified or licensed trades in most countries. Ask your contractor to name the specific approval needed; see the country checklist on this page for what applies where you live.

Checkatrade's 2025-26 guide puts a new bathroom including materials at £5,500-£8,000 with an average around £7,000; budget refits can come in near £3,000-£4,500 and large or high-end bathrooms run £14,000+. Fitting labour alone is typically £1,500-£4,000 depending on scope.

A straightforward refit takes about 5-10 working days; layout changes or first-floor drainage rework push it to two to three weeks. Book fitters ahead — good bathroom installers in most UK cities carry 4-8 week lead times.