How much does a bathroom renovation cost in London in 2026?
Honest price ranges, what drives the cost up or down, and what to watch out for when getting quotes in South West London.
By Distinct Spaces · Updated June 2026 · 6 min read
If you've asked three different contractors for a bathroom renovation quote and received three completely different numbers, you're not imagining things. Bathroom costs in London genuinely vary — and the range is wide. A basic refresh can cost £4,500. A full wet room with underfloor heating, frameless glass and high-end sanitaryware can reach £22,000 or more.
This guide gives you an honest breakdown of what drives cost, what you can expect to pay in South West London in 2026, and what questions to ask before you commit to anything.
The short answer: three price bands
Most bathroom renovations in London fall into one of three categories:
Basic refresh — £4,500 to £7,000
New suite (toilet, basin, bath or shower enclosure), standard tiling, no layout changes. Labour and materials included. Good for a secondary bathroom or a rental property.
Mid-range renovation — £9,000 to £15,000
Better fixtures, larger format tiles, some layout changes, new heated towel rail, improved lighting. Most family bathrooms in South West London fall here.
Premium renovation — £18,000 to £30,000+
Wet room or freestanding bath, bespoke joinery, underfloor heating, concealed plumbing, designer sanitaryware. Principal bathrooms in Richmond or Chiswick homes often sit in this bracket.
Why London costs more than the national average
London labour rates are higher than the rest of the UK — typically £220 to £350 per day per trade, depending on the specialism. Bathroom renovations require multiple trades working in sequence: first a plumber and an electrician, then a tiler, then a decorator and a joiner for any fitted furniture. Getting that sequence right without delays takes proper project management.
There are also practical London factors: parking permits, ULEZ charges, and the time it takes a van to cross the city all feed into a contractor's costs. Outer South West London areas like Twickenham, Richmond and Kingston tend to be slightly cheaper than central London, but you should still expect to pay 15–25% more than a national average estimate.
What drives the cost up
Moving the plumbing. If you want to shift the toilet, basin or shower to a different position, soil pipes and supply pipes need to be rerouted. This adds cost and sometimes requires structural work depending on your floor construction.
Tile choice. Large format tiles (600×1200mm and above) are popular in 2026 and look excellent, but they take longer to lay, produce more waste during cutting, and require a perfectly flat substrate. That prep work adds time and cost.
Wet room tanking. Converting a standard bathroom to a wet room (fully waterproofed, level-access shower) requires a membrane system tanked to the walls, floor drainage set into the screed, and careful waterproofing at every junction. It's worth doing properly — done badly it leaks into the floor below.
Electrics. Bathroom electrics must be done by a Part P certified electrician. If you're adding underfloor heating, a new extractor fan, or repositioning lighting, budget for a dedicated electrical visit on top of the main build.
Period properties. Many homes in Twickenham, Richmond and Kew are Victorian or Edwardian. Once walls are opened up, you may find original lime plaster, uneven floor joists, old lead pipework, or no existing ventilation. These discoveries extend the programme and add cost — which is why a proper survey before you quote matters.
Do you need building regulations approval?
Most bathroom renovations — replacing like-for-like fixtures, retiling, new shower enclosure — don't require formal building regulations approval. However, if you're adding a new bathroom in a space that didn't previously have one, moving a soil stack, or making changes that affect ventilation or structural elements, building control may be involved. A good contractor will tell you upfront which category your job falls into.
What a fair quote looks like
A reliable quote should be itemised — labour broken out from materials, each trade listed separately, and any provisional sums (for items not yet chosen, like tiles or sanitaryware) clearly labelled as such. A single lump sum with no breakdown is a red flag: it makes it impossible to compare quotes or understand what you're actually paying for.
At Distinct Spaces, every bathroom quote is written line by line before work starts. We carry out a proper site survey first — not a five-minute look at a photo — because period bathrooms in South West London regularly hide surprises that affect cost and programme.
Ready to talk through your project? We do free site visits across South West London.
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