Cost to Fix a Leak in the UK (2025)
Fixing a simple leak costs £80–£300. More complex leaks behind walls or in roofs can cost £500–£3,000+ depending on access and damage.
Types of leaks and who to call
Dripping taps and under-sink leaks are plumbing jobs. Roof leaks need a roofer. Leaks from central heating pipes need a plumber or heating engineer. Leaks from chimneys or flashing need a roofer or builder. Always identify the source before calling — it saves time and money.
What affects the cost most?
Access is the biggest cost driver. A visible leak under a sink can be fixed in an hour. A leak inside a wall or under a concrete floor requires cutting into plasterwork or lifting floors — adding significantly to the labour and making-good costs. Always ask for a full quote before work begins, including reinstatement.
Cost Breakdown
All prices are indicative UK averages for 2025. Actual costs vary by location, specification, and contractor. London and South East rates are typically 20–35% higher.
| Item | Low | High |
|---|---|---|
| Dripping tap repair | £80 | £180 |
| Under-sink or isolation valve | £100 | £250 |
| Burst or leaking pipe (accessible) | £150 | £400 |
| Leak inside wall (trace and repair) | £400 | £1,500 |
| Roof leak repair | £150 | £600 |
| Leak under concrete floor | £800 | £3,000 |
What Affects the Cost?
- ✓Location of the leak — visible vs concealed
- ✓Whether walls, floors, or ceilings need to be opened up
- ✓Urgency — emergency call-outs attract higher rates
- ✓Whether any damage (damp, mould) needs remediation
- ✓Location — London and South East rates are higher
Get Free Quotes for This Work
Post your job on Quote2 and receive up to 3 quotes from local, reviewed tradespeople. Free for homeowners.
Post a Job — It's FreeFrequently Asked Questions
Should I turn the water off if I find a leak?
Yes — turn off the stopcock (usually under the kitchen sink or outside the property) to prevent further damage while you arrange a repair. For a central heating leak, turn off the boiler and let the system cool.
Will my home insurance cover the leak repair?
Home insurance policies vary widely. Most cover the damage caused by a leak (e.g., wet ceilings, damaged floors) but not the plumbing repair itself. Check your policy before claiming, as it may affect your premium.
How quickly can a plumber fix a leak?
Most local plumbers can attend within 24–48 hours for a non-emergency leak. Same-day emergency plumbers are available but typically charge premium rates.