Stopcock Replacement Cost
£100–£200typical UK range. Last updated October 2026.
Replacing an internal stopcock typically costs £100–£200 supplied and fitted, averaging about £150.
What each option costs
| Type | Typical cost | Notes |
|---|---|---|
| Internal stopcock replacement | £100–£200 | Supply and fitting |
What affects the price
- Internal or external valve
- Access and pipe condition
- Manual or automatic shut-off
What’s included
- The valve and fitting work stated in the quote
- Isolation, reconnection, and leak testing
Good to know
How long does it take? A straightforward internal stopcock replacement can take under an hour.
Do I need one? Replace a seized or leaking private stopcock; check ownership before arranging work on an external valve.
Before you book, read what to check before a plumber starts.
How to pay less
- Keep the valve accessible
- Confirm whether the external valve belongs to the water company
Confirm access and the isolation arrangement
Send a photo of the internal valve and its surrounding access, taken without moving plumbing. Describe leakage or seizure, pipe condition where visible, cupboards or boxing around it and whether it serves only this property. The plumber needs to establish a safe isolation arrangement before replacement. Ask the water supplier about ownership and arrangements if an external or shared valve is involved; do not assume it belongs to you.
A complete replacement quote covers more than the valve
Ask whether attendance, minimum labour, the replacement valve and fittings, isolation, reconnection and leak checks are included. Identify cabinet removal, pipe repairs, return visits and making good as included or separate. Confirm VAT treatment and who approves extra work if access or pipe condition differs from the description. Compare the complete plumbing charges in the linked hourly-rate guide, then describe the stopcock work to request a quote.
