The short answer
Responsibility depends on where the blockage is. A blockage in the pipes within your property boundary is usually the homeowner's responsibility. A blockage in a shared (lateral) drain or the public sewer is normally the water company's responsibility and often cleared free of charge. If it's your bill, choose an insured engineer who diagnoses before charging.
Knowing whose problem it is can save you a bill entirely — and helps you push back if someone tries to charge you for a sewer that isn't your responsibility.
Responsibility
- Within your boundaryhomeowner
- Shared/lateral drainusually water company
- Public sewerwater company
- Rented homeoften the landlord
- If unsureask your water company first
How to tell whose it is
As a rule of thumb, the pipe serving only your home, up to your boundary, is yours. Pipes shared with neighbours or running into the public sewer transferred to water companies in 2011 and are generally their responsibility. If you're not sure, your water company can confirm before you pay anyone.
| Where the blockage is | Usually responsible |
|---|---|
| Your own pipe, inside your boundary | Homeowner |
| Shared drain with neighbours | Water company |
| Public sewer | Water company |
| Rented property | Landlord (usually) |
General position in England & Wales; confirm with your water company.
Choosing an engineer if it's your bill
- Insured, with a clear complaints route.
- Diagnoses (and ideally shows you) before charging for jetting or excavation.
- Gives an all-in price or a capped rate, not an open-ended hourly charge.
- Has recent, checkable local reviews.
If the bill's yours, get it done fairly
We'll match you with a vetted, insured drainage engineer who diagnoses first and quotes clearly.
Frequently asked questions
Are blocked drains the water company's responsibility?
If the blockage is in a shared drain or the public sewer, usually yes — and often cleared free. Blockages in the pipe serving only your home, within your boundary, are usually yours.
Who pays for a blocked drain in a rented house?
It's usually the landlord's responsibility unless the tenant caused it through misuse. Report it to the landlord or letting agent promptly.
How do I find out if it's my drain?
Your water company can tell you whether the affected pipe is your responsibility or theirs before you commit to paying for any work.
Sources & further reading
Figures on this page are typical UK ranges drawn from published cost guides and are intended as guidance, not a quotation.