Drainage Repair Costs in Wales 2026
Drainage repair costs in Wales depend on the type of problem, access, and method required. High rainfall in Wales means drainage issues are among the most common homeowner problems â blocked gullies, collapsed pipes, and inadequate soakaways.
Typical drainage costs in Wales (2026):
| Job | Typical cost |
|---|---|
| Drain clearance (high-pressure jetting) | £80â£200 |
| CCTV drain survey | £150â£350 |
| Drain repair (patch liner) | £400â£900 |
| Full drain relining (per metre) | £100â£300 |
| Drain excavation and replacement | £600â£3,000 |
| Soakaway replacement | £700â£2,000 |
| Gully replacement | £200â£600 |
Emergency call-outs for blocked drains outside normal hours add a premium â expect 50â100% more than standard rates.
Blocked Drain Clearance in Wales
Blocked drains in Welsh homes most commonly result from:
- Root ingress (trees near drainage runs)
- Grease and fat accumulation (kitchen waste pipes)
- Wet wipes and sanitary products (cause most sewer blockages)
- Collapsed or displaced pipes (common in older Welsh properties)
High-pressure water jetting is the standard clearance method for most blockages. A CCTV survey is recommended after clearance to identify underlying problems â collapsed pipes or root ingress that have caused the blockage will recur without repair.
In Wales, where heavy rainfall is frequent, surface drainage problems (flooded patios, blocked gullies, poor driveway drainage) are also common. These typically require a groundworks solution â improved grading, new gullies, or a permeable surface.
Welsh Water responsibility: Welsh Water (Dŵr Cymru) owns and maintains the public sewer. Private drains within your property boundary are your responsibility. Since 2011, lateral drains (shared sections between your property and the public sewer) are also Welsh Water's responsibility â worth checking before spending on shared drainage repairs.