This will depend on the home you choose to buy. Some homes are much more energy efficient than others. It is a good idea to get this information from the present home owner.
With that being said there is general information out there by way of the internet: http://www.connectutilities.com/wf/
will allow you to locate and connect to a utility company; compare and order cable, broadband, phone, newspaper subscriptions, home security and other home services.
To find a home in North Raleigh, please contact me at a toll free number 1-800-225-5947 ext. 8554.