Contact Developer Services

We’re always happy to help with any queries about your development proposals.

You'll deal with a named contact once we've received your application. For general enquiries outside this process, please see the details below.


Please call us on 0800 009 3921.

Our lines are open from 8am to 5pm, Monday to Friday, and are closed at weekends and bank holidays.

If your hearing or speech is impaired, you can contact us using the Next Generation Text Service (NGTS).

Email us

Please email us by clicking below.

Email us

Write to us

Thames Water
Developer Services
Clearwater Court
Vastern Road

We'll respond to your letter within seven days.


We try our best to get things right first time, but realise that we occasionally don’t achieve the high standards we set ourselves.

If you’re concerned about any aspect of our service, your first step should be to call us on 0800 009 3921. If we aren’t able to quickly resolve your complaint, our case management team will investigate and call you back within two working days.

Alternatively, please write to marking your email for the attention of the case management team. We’ll reply to your complaint within five working days of receiving it, and will tell you the contact details of the case manager dealing with your complaint.

Please look at our customer quality scheme for further details.