Who Is Responsible for a Blocked Drain?
In short
Drainage inside your boundary that serves only your property is normally yours to maintain. Lateral drains beyond your boundary and drains shared with other properties transferred to the water and sewerage companies in England and Wales in October 2011, so those are normally cleared free of charge. Public sewers are always the water company's. Responsibility can vary with tenure and title, so check where the blockage actually is before paying for work.
Responsibility for a blocked drain depends on where the blockage is, not on who noticed it. Getting that clear early can be the difference between paying for a repair and having your water company carry out the work at no cost to you.
The rules changed in October 2011, when most private sewers and lateral drains serving more than one property in England and Wales transferred to the water and sewerage companies. Many homeowners are still charged for work that is no longer theirs.
The simple rule of thumb
Drainage that lies within your property boundary and serves only your property is your responsibility as the homeowner. Once a pipe leaves your boundary, or once it takes waste from more than one property, it is very likely the water company's responsibility.
- Your drains: the pipework inside your boundary serving only your home, including gullies, inspection chambers and the run to the boundary.
- Lateral drains: the section beyond your boundary before it reaches the public sewer — normally the water company's.
- Shared drains: pipework taking waste from two or more properties — normally the water company's.
- Public sewers: always the water company's responsibility.
- Highway drainage and road gullies: the local council or National Highways.
Renting, leasehold and shared driveways
If you rent, blocked drains are usually the landlord's responsibility to repair under their repairing obligations, unless the blockage was caused by misuse — wipes, fat or nappies, for example. Report it in writing so there is a record.
In flats and leasehold blocks, communal drainage generally falls to the freeholder or managing agent through the service charge. On shared private driveways serving several houses the drainage will often now sit with the water company, even where residents assume it is theirs collectively.
How to establish where the blockage actually is
Lifting the inspection chambers tells you a lot. If the chamber nearest your house is clear but the one at the boundary is full, the blockage is downstream of your property. If your chamber is surcharged and the boundary chamber is empty, the problem is inside your boundary.
Where it is not obvious, a CCTV drain survey with a recorded location and depth gives you evidence — which is what a water company, insurer or managing agent will ask for before accepting responsibility.
What we do when the drain isn't yours
If we attend and find the fault lies in a public sewer or shared lateral, we tell you and give you the information you need to pass to your water company. We would rather be honest and be called again than charge you for someone else's pipe.
Still not resolved? 24/7 Emergency Drain Callouts can help
Drain blocked, sewage backing up, or water where it shouldn't be right now. Our engineers are available 24 hours a day with no call-out charge, and you get a fixed price before any work starts.