Bathrooms · Updated August 2026
Bathroom Plumbing Cost UK 2026
Plumbing first and second fix on a bathroom runs £900–£2,200. The number that moves it most is whether the soil stack stays put — keeping the WC where it is can be the difference between the bottom and the top of that range.
Bathroom plumbing cost by job — 2026
Anything that moves waste rather than supply is where the money goes.
| Job | Typical 2026 cost | Notes |
|---|---|---|
| Plumbing first & second fix (full bathroom) | £900–£2,200 | Moving the soil stack is the big cost driver |
| Plumber call-out / first hour | £60–£120 | London at the top of the range |
| Additional hourly rate | £45–£90 | Half-day and day rates often cheaper |
| Emergency / out-of-hours call-out | £120–£300 | Plus hourly rate on top |
| Replace shower valve or mixer | £150–£350 | Plus the valve itself |
| Replace toilet (like for like) | £150–£350 | Plus the unit |
| Waste re-route / new drain run | £200–£700 | Joist direction and the drop available decide it |
| Move the soil stack | £800–£2,000+ | Structural and often needs building control |
Source: Best Builders 2026 quote data across 519 UK towns.
What changes the cost
| Cost factor | Typical impact | Why it matters |
|---|---|---|
| Moving the soil stack | +£800–2,000 | Waste runs on gravity; relocating the WC is the single biggest driver |
| Waste re-route | +£200–700 | Joist direction and the drop available decide what is possible |
| Strip-out & disposal | +£400–900 | Skip hire, access, and artex from the asbestos era |
| Electrics & extractor | +£450–1,200 | Part P certification and IP-rated fittings are notifiable work |
| Floor structure alterations | +£0–1,800 | Timber joists often need notching or a dropped deck |
| Spec tier | ×1.5–3 | Budget to premium roughly triples the fittings bill on the same room |
| Region | +20–30% (London/SE) | Higher labour rates and access challenges |
Bathroom cost by UK region — 2026
Labour rates drive most of the spread. Figures are for a mid-spec bathroom; the same percentages apply across the other job types.
| Region | Standard bathroom (mid-spec) | Wet room (mid-spec) |
|---|---|---|
| London | £7,000–18,000 | £10,000–28,000 |
| South East & Home Counties | £6,000–16,000 | £8,500–24,000 |
| South West & Midlands | £5,000–13,000 | £7,000–20,000 |
| North of England | £4,500–12,000 | £6,500–18,000 |
| Scotland, Wales & NI | £4,000–11,000 | £6,000–17,000 |
Getting it priced properly
1. Settle the layout first
Whether the WC, bath and basin stay put decides most of the cost. Agree the layout before anyone quotes, because moving waste changes the number entirely.
2. Ask who certifies what
Bathroom electrics are notifiable under Part P and any gas work is legally Gas Safe. Ask which trade is certifying which part, and check the register yourself.
3. Compare like for like
Get three itemised quotes covering the same spec tier, the same fittings and the same amount of making good, so you are comparing the job and not the wording.
Plumbing — frequently asked questions
Waste runs on gravity, so a WC needs a fall to the soil stack. Moving it means new waste runs at the right gradient, often notching or boxing joists, and sometimes relocating the stack itself — £800–£2,000+ rather than the £150–£350 of a like-for-like swap.
Not for plumbing itself, but a bathroom almost always involves both: any gas appliance work is legally Gas Safe, and electrics in a bathroom are notifiable under Part P. Ask who is certifying what before work starts.
First fix is the pipework buried in walls and floors before plastering. Second fix is hanging the taps, shower, WC and basin once tiling is done. Quotes that give one figure should still itemise both.
Often yes on supply, if it is copper and sound. Old lead or failing plastic push-fit should be replaced while the walls are open — it is far cheaper now than after tiling.
Related bathroom guides
Every size and spec tier priced side by side.
Tanking, falls and drainage priced line by line.
What the fitter charges, separate from materials.
Reviewed by the BestBuilders editorial team on 9 August 2026 · Next scheduled review: November 2026 · See our editorial standards.