A householder planning application may not necessarily be the route for you. Permitted Development, or PD, does not have the 45-degree rule. There are, however, other restrictions, such as materiality to be matching to the existing house, and the height of the extension limited to single story. For more information on the full list of permitted development rules click here. At Fingerprint Studios we can guide all clients on the pros and cons of each type of planning application to ensure that you end up with the most suitable strategy for your home.