Bathroom Plumbing Costs: Small Jobs to Full Refits (2026)
Bathroom plumbing spans the cheapest jobs in the trade and some of the largest domestic projects, which makes averaged 'bathroom cost' figures nearly useless. The useful version itemises: small works, sanitaryware swaps, and refit wet-side scope split into first and second fix. Here's that breakdown for 2026.
Small works: the everyday bands
Reseal a bath or shower (strip, sterilise, re-silicone): £95–£160. Waste and trap repairs: £85–£140. Toilet internals: £75–£130. Tap repairs £65–£120, replacements £90–£160 labour. Fixing the leak a failed seal let through is quoted on what the water reached — the argument for booking the £120 reseal the month the silicone blackened rather than the year after.
Sanitaryware swaps
Like-for-like swaps on sound connections: basin £140–£260, toilet £160–£300, bath £280–£520 (access and waste realignment drive the spread), shower tray £320–£600 with tanking checks. 'Like-for-like' is the operative phrase — moving positions converts a swap into first-fix work, and honest quotes say so at survey rather than at invoice.
Refits: first fix and second fix, separately
First fix — routing supply and waste to the new layout, isolation on every feed, pressure test before boarding — typically runs £900–£2,200 for a standard family bathroom depending on how far services move. Second fix — fitting and commissioning sanitaryware, brassware and wastes after tiling — lands £700–£1,500. Quoted separately, the two stages let you stage spend and compare contractors on identical scope. A single 'bathroom plumbing' number hides exactly the detail you need.
Where refit budgets actually leak
The overruns are predictable: discoveries behind old tiling (rotten boards, corroded pipework — hold a contingency), position moves decided after first fix ('while you're here' is the most expensive phrase in construction), and premium brassware whose cartridges and spares cost premium forever. The savings are predictable too: keep the toilet within a metre of the stack, decide positions before pipework, and put isolation valves everywhere while walls are open — they repay themselves at the first future fault.
| Scope | Typical cost | Notes |
|---|---|---|
| Reseal bath/shower | £95–£160 | Strip + sterilise + re-silicone |
| Sanitaryware swap (per item) | £140–£600 | Like-for-like, sound connections |
| Refit first fix | £900–£2,200 | Pipework to new layout, tested |
| Refit second fix | £700–£1,500 | Fit + commission after tiling |
Reading quotes against these numbers
National price bands earn their keep at comparison time: any quote inside the range with clear inclusions is negotiating in good faith; anything dramatically outside it — in either direction — is a prompt for questions rather than automatic rejection. Regional variation is real (London and the South East price higher throughout), as is access difficulty, which legitimately doubles some jobs. What never varies legitimately: surprise doorstep supplements and prices that grow after work has started.
Frequently asked questions
Why do plumbers quote first and second fix separately?
Because they're different work at different project stages, and separating them makes quotes comparable and spend stageable. A single number hides scope differences between contractors.
What's a realistic contingency for a bathroom refit?
On the wet side, 10–15% covers the usual discoveries behind old finishes. Zero-contingency budgets don't remove surprises; they just remove the plan for them.
Can I reuse my existing taps and shower on a new suite?
If they're sound and compatible, yes — it's a real saving. Worn cartridges and obsolete valves are better replaced while everything is open than retrofitted after tiling.
Does moving a toilet cost much more than replacing one?
Substantially — position moves are first-fix work with waste-fall constraints, not swaps. Keeping the pan near the soil stack is the single biggest cost-saver in bathroom design.
Getting this fixed properly
If reading this has confirmed you need an engineer rather than a Saturday afternoon, that's a useful outcome — the expensive version of most plumbing problems is the one that was almost fixed. Our network's vetted local plumbers handle this work daily: they carry the common parts, price before starting, and are insured for the rare occasion something goes sideways. Emergencies get 24/7 response; planned work gets a proper quote. And if your problem turns out to be drainage rather than supply plumbing, our drainage partner picks it up seamlessly.