What's the process?
We’ve published a guide explaining all the steps involved in connecting a new or replacement water supply, what you need to do and how long the process will take.Steps to connect
How can I apply and how much will it cost?
You can estimate our charges yourself by referring to the ‘service connections’ section of our charging arrangements.
If you’d like us to give you an estimate or a quote, there are two ways we can help you:
1) Budget estimate (within 24 hours)
If you just want to understand the probable cost to replace, upgrade or split your existing water supply, we can give you a quick and easy budget estimate, usually on the same day. One of our advisers will take you through the process. At that stage, you can proceed to a formal quote if you want.
You need to use the full application form below rather than a budget estimate if you:
- Are in a hurry to complete your connection
- Need a completely new connection (usually for a new property).
Call us on 0800 009 3921 for a budget estimate (Monday-Friday, 8am-5pm).
Please note, we will charge a non-refundable application fee and design fee from October 2018.
2) Full application form (up to 28 days) or pay for your quote
You'll also need to upload a drawing detailing the point of entry for your new connection.
You can submit an application online, via phone or by completing a paper form.
For details on how we’ll use the information you provide in your application, click here.
By phone: Phone us on 0800 009 3921 to pay by card. Please note that we don’t accept American Express or Solo cards.
By post: Make cheques payable to Thames Water Utilities Ltd and write the reference number starting ‘DS’ on the back. Send to:
Thames Water Developer Services
By BACS or CHAPS payment:
Pay to the Thames Water Utilities Ltd account, quoting the reference number starting ‘DS’ and using the following information:
Sort Code: 60-00-01
Bank Account: 90478703
For international payments, the IBAN number is GB96NWBK60000190478703.
For CHAPS payments, the BIC number is NWBKGB2L