How Deep Are House Drains?

The depth of house drains in the UK typically ranges from 600mm (0.6m) to 1.5m below ground level, though some pipes — especially those running under roads or connecting to deep public sewers — can be 2m, 3m, or even deeper. Understanding how deep your drains are matters for planning building work, estimating repair costs, and assessing excavation complexity.

What to Look For

• Drains leaving the house: typically 600mm–1m deep
• Drains at the property boundary: 1–1.5m deep
• Drains under roads: 1.5–3m+ deep
• Connection to public sewer: varies hugely by location
• Older properties may have shallower drains than modern homes
• Depth increases as drains run further from the house due to gradient

How We Diagnose the Problem

We use CCTV cameras with sonde transmitters to measure the exact depth of your drain pipes at any point. The receiver above ground detects the camera's signal and calculates the depth, allowing us to map the full profile of your drainage system.

How We Fix It

Knowing pipe depth is essential for planning repairs (deeper pipes cost more to excavate), avoiding drains during building work, and understanding why certain problems occur (shallow pipes are more vulnerable to frost and traffic damage).