Top of main content

Process for self-laying new mains and services

If you're extending or building a new property, you can ask us to design and build the new water mains and service pipes.

Alternatively, you can choose an accredited self-lay provider (SLP) to complete some or all of this work. SLPs may offer more flexible timescales and the option to install multiple utilities, which could save you time and money.


SLPs must complete the work under the Codes for Adoption and be accredited by the Water Industry Registration Scheme (WIRS).

Find a list of approved SLPs.


Our charging arrangements allow you to estimate application, design and other charges relating to the construction of your new water mains. We update these on 1 April each year.

Overview of the process

Process for self-laying new watermains