New water connections - standard size

If you’re building a new home or commercial property (such as a shop, office or industrial building), unless you’re planning on harvesting rainwater, you will probably need a new connection to our water main.

You might need a new water connection if you are:

building a new property
building onto an existing property (e.g. an extension, granny flat or annexe)
in need of a temporary building supply
converting a property into multiple units with individual supplies
converting a property that was once used for a different purpose (for example, converting a barn or garage into a house/home)
installing a fire apparatus (e.g. a fire sprinkler)
in need of a supply for irrigation purposes
moving from a private supply

You might need a replacement water supply if:

your water pressure is low and you require a larger supply
you are separating a shared supply
you are converting a property into multiple units with a shared supply

If you have any queries on the process our detailed guidance notes at the bottom of this page should be able to help.

How long will it take?
There are several stages to the new water connection process:

We’ll review your application within 5 working days and may get in touch if we need any further information. To help avoid delays, please make sure the application fee is paid.

We’ll send you a quote telling you how much the connection will cost within 28 days.

You’ll need to pay the quote, excavate the trench and lay the supply pipe.

You’ll need to contact us to arrange a trench inspection which we’ll aim to complete in 5 working days.

Self-certification

This allows approved contractors to inspect and sign off their own trench installations without waiting for a Welsh Water inspector to attend site. Click here for more information.

We’ll then construct the boundary box and connect you within 21 days (although this will be longer if we need to complete work in the highway).

How much will it cost?
The cost of a new water connection is made up of four different charges:

This is an upfront non-refundable fee, paid on application, using a valid credit or debit card.

A standard connection is £148.74+VAT per application. The quote you then receive will be valid for six months. After this point you will have to pay a new application fee. To apply for a standard connection, please login to the portal at the bottom of this page.

For standard sized connections, the costings are bespoke and based on the amount of work necessary to connect you to our water network. Each connection is reviewed on a case-by-case basis using the prices listed in the schedule of charges. There could also be additional fees, such as where additional meterage is needed to bring the service pipe up to the connection point. You can find out more information on this from page 9 onwards of our schedule of charges. VAT is only applicable where the properties are not exempt from VAT.
For larger connections, we will build up a bespoke quote. VAT is only applicable where the properties are not exempt from VAT.

This is a one-off charge:

£541 per property for standard connections
£541 x relevant multiplier for larger connections (you can find details of our multipliers on pages 22-23 of our schedule of charges)

This is a one-off charge, set by our regulator Ofwat, which is applicable for properties who are also connecting to our sewerage system and opt for a standard new water connection:

£541 per property for standard connections
£541 x relevant multiplier for larger connections (you can find details of our multipliers on pages 22-23 of our schedule of charges)

For information on our charges, visit our schedule of charges here.

View an indicative cost for your new water connection by selecting your connection size. Please note, this is not a formal application for water services.