Whether you're building a large development or renovating a property, we've got the know h2ow to guide you through the process and help you on your journey.

Everything you need to know is set out below, but if you still need more information don't hesitate to email developer.services@southeastwater.co.uk or give us a call on 0333 000 0060 (lines are open Monday to Friday, 8am to 4pm).

Our charges

Click here to find out about our charges for new connections.


Self-lay applications

Click here to see our list of self-lay application forms and guidance notes.

Self lay application form
Guidance notes


Fire main and sprinkler connection

Fire hydrants
Fact sheet
Policy on domestic sprinkler systems

Water connections to an existing main

Section 45 (services) application form


Water UK levels of service

Water UK produces a set of standards that you can expect from us. Find out how we're performing here.



NAV information

You can ask for a ‘New Appointment and Variation’ (NAV) to serve your development in a defined area known as an inset.

NAV prices 2021/22

NAV Enquiry Form
Bulk supply agreement 
NAV policy and process overview


New mains connections

Section 41 (Water Mains) application form
Pre Development (Budget) enquiry

Working near a water main

A guide to works near our water main
C3-C4 Diversion application

Mains requisition calculator

Use our calculator here to estimate the cost of on-site water mains.


Find a groundworker

Use the below postcode checker to find an approved groundworker near you.

If things go wrong

If we've got something wrong, please click on the link below and follow the step-by-step guide so we can investigate.

Complaints procedure & redress arrangements

Launch Recite Me web accessibility software

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