Have you tried our Frequently Asked Questions? See www.sarh.co.uk/faq
Gas and electric accounts, why does it take so long to change the name of the account or change supplier?
As your new home is a newly built property, you may experience delays in being able to register the property’s utility accounts into your name. This is not unusual and can take some time due for the national data bases to be updated.
We advise customers to save money for the first utility bill as you may find your first bill is higher than usual due to the delay in changing the account holder name.