Connecting your property to the Thames Water Utilities Sewer

Civil Engineering

Connecting to Thames Water Utilities sewers can only be done by a Thames Water Utilities approved contractor. SB Civil Engineering is an approved Thames Water Contractor. TWU must inspect the connection to ensure it complies with the Water Industry Act 1991.

You need two pieces of information to be able to get us to quote you for your connection.

The first is the Thames Water (TW) Asset drawing, showing the public sewers in the vicinity, this will provide us with details of the size & depth of the existing sewer, with upstream and downstream manhole locations for over pumping.

Please request the Thames Water asset drawing for your location, from Thames Water Developer Services:

Tel: 0845 8502777

Address: Thames Water, Developer Services, Clearwater Court, Vastern Road, Reading, RG1 8DB

Email a request direct from the Thames Water Utilities website here:

Once you have the Thames Water Asset drawing that relates to your property location (these can be obtained within 24 hours through an express service for about £100 or within about 4 to 5 days normally for about £55) you then need to contact them to request Consent/Notice to Connect. This will be issued to you in the form of a letter. To request this Thames Water Consent to Connect you need to:

Go to the following web address and complete the form. The information that you will need to complete this includes the following:

  • Your full name, contact number and email address.
  • The address of the property to be connected to the sewer.
  • Payment details for the type of connection needed.
  • A copy of detailed plans, including site location plan indicating:
  • The location / point of connection (connection points should be labelled individually)
  • Size of proposed connection
  • Size of sewer
  • Level of connection

A Thames Water engineer will technically assess your application to discharge to the TWU network and advise you on whether it has been approved or refused. On approval please send both the Thames Water Asset Drawing and the Thames Water letter for the Consent/Notice to Connect to SB Civil Engineering by email to: or in hard copy to:
SB Civil Engineering Limited, G29 Allen House, The Maltings, Station Road, Sawbridgeworth, Herts, CM21 9JX.


We can then assess the physical work involved to make the connection, this usually includes a site survey, size of site gang/workforce, equipment and materials needed plus any involvement with the local highway department as to whether there is any significant impact on the public road network, i.e any parking bays/roads that may need to be closed or suspended.

Call SB Civils for a low cost quote for your Thames Water sewer connection / Sewer works 01279 276030.


Civil Engineering