Sewer closure

Abandoning a public sewer

If you need to abandon a sewer to make site remediation works easier or remove a restriction from future development, we may be able to close part of the public sewer network for you.

Before a sewer can be closed

We must be certain the sewer is no longer in use or needed. This usually involves:

• a CCTV survey of the public sewer and any private drainage connections
• written evidence to support the closure.

There should be a manhole at the new upstream point of the sewer. If one isn't already in place, a new one needs to be built to meet our requirements.

What happens after closure?

After the sewer is officially closed:

• We'll issue a closure certificate
• The sewer must be abandoned as soon as possible
• Our inspector will monitor the abandonment process

How sewers are abandoned

We prefer the sewer to be grubbed up (excavated and removed) with any redundant chambers. If that's not practical, the sewer should be sealed and filled with grout.

Updating the sewer map

We'll update the Statutory Sewer Map to show the changes:

• Grubbed-up sewers are removed from the map
• Grouted sewers are shown as abandoned

Who covers the cost?

The applicant or developer is responsible for covering the costs of the closure and abandonment. These works are usually carried out by them and must meet our standards.

Ownership after closure

Just so you know, even when a public sewer is closed, it's still our responsibility and can't be transferred to private ownership.