Building over a sewer: Self Certification

If you’re extending your property, you’ll need to make sure you know if there are any water mains, public sewers or drains on your land. It’s a good idea to find out before you begin, so the work goes as smoothly as possible.

We’d advise all our customers to complete the self-certification form first.

This is because it is the most common method for our customers. If you meet the self-certify criteria, or can amend your plans to suit, we will award consent to you building over or near to your sewer and you will receive an approval notice via email within 3 days of your submission. Once you have this notice, you can start building.

If you complete the form and you don’t meet our criteria, then you will need to complete the full application, which is a more detailed form.

How long will it take?

Once we’ve received your submission via our online portal, we’ll aim to respond within 5 working days.

It’s worth noting that to complete the below self-certification form, you will need know the following:

  • Location and route of the public sewer to your proposed build
  • Size and depth of the public sewer
  • Material of the public sewer
  • Type of public sewer e.g. gravity fed or pumped
  • Type of proposed foundations to be used

Are you a customer in need of extra support?

If you’re converting or extending your property to make it more accessible for someone with physical impairments, then let us know on the ‘nature of proposal’ section of your application form. We can offer additional support such as helping you to fill in your application, and more advice and support through the building and construction process. To discuss your proposals please contact our dedicated Build Over Sewers team on 0800 917 2652.