This page contains all the forms and their relevant guidance notes required for any matters concerning the Southern Water sewerage and water networks.

It is advisable to read the guidance notes before filling in a form. Many forms require detailed site and other information and care should be taken that all information requested is filled in otherwise the application could be delayed. Most forms will require an application fee which must accompany the form.

Please use the postcode checker to ensure your property/development is in the Southern Water region.

Water Application Forms

Capacity Check Application form
S41 Water Main Requisition Application form
S45 Water Connection Estimate form
Water Main diversion Application form

Water Guidance Notes

Capacity Check Guidance Note
S41 Water Main Requisition Guidance Note
S45 New Connection Guidance Note
Self Lay Guidance Note
Infrastructure Charges leaflet

Sewerage Application Forms

Capacity Check Application form
Build Over Application form
S98 Off-site Sewer Requisition Application form
S102 Adoption of existing Sewers, Wastewater Pumping Stations and Treatment Works form
S104 Sewers for Adoption Applications Form - Updated
S106 Sewer Connection Application Form
Sewer Diversion Application Form

Sewerage Guidance Notes

Capacity Check Guidance Note
Build Over Guidance Note
S98 Off-site Sewer Requisition Guidance Note
S102 Sewers for Adoption Guidance Note
S104 Sewers to be Offered for Adoption - Updated
S106 Sewer Connection Guidance Note
Sewer Diversion Guidance Note
Infrastructure Charges leaflet