A dormer window may need planning permission. We have a self-assessment form that will help you decide if your proposal needs planning permission: Dormer windows self-assessment form. Completing this form should help you understand whether you need planning permission for your dormer window. Should you wish to have further advice, the Council can check your completed form and supporting information and provide an informal written opinion as to whether planning permission is required. The fee for this service can be found here.
All new dormer windows or roof lights on a listed building will require listed building consent.
Do I need planning permission?