It is important that you advise us of any changes that you wish to make to your account, such as changing your contact details or bank account details (if it will affect your Direct Debit payments).

How to update your account details

Use our online forms:

Change your mailing address
 

To change the main name on your account or for anything else, please use our general enquiry form.

Online enquiry form

 
Call us

Please call us on 0845 9200 888 (Textphone: 0845 7200 899).

Our lines are open from 8am to 8pm, Monday to Friday, from 8am to 1pm on Saturdays and closed on Sundays and bank holidays. 

If you are calling from outside the UK, please call +44 1793 366 011.

Please note that under the Data Protection Act, we can only discuss or change account details with named account holders or an authorised representative.

Changing named account holders

When adding additional named account holders, we need permission from the person being added to the account.

If the main named account holder leaves your property, we require notification from a named account holder who is staying at the property.

If the people remaining at the property are not currently named account holders, you will need to complete our online form, or call us on 0845 9200 888 (Textphone: 0845 7200 899).

Our lines are open from 8am to 8pm, Monday to Friday, from 8am to 1pm on Saturdays and closed on Sundays and bank holidays. 

Power of attorney

If you are granted power of attorney, please send copies of all supporting documents, such as a copy of a solicitor's letter, to:

Thames Water
PO BOX 286
Swindon
SN38 2RA

We will then update the named account.