Pre-application advice
Please bear in mind that pre-application advice is an officer level opinion based on information available. In the event of you subsequently submitting a planning application, such observations will not bind the Local Planning Authority in its consideration of your application.
A pre-application enquiry cannot be used to obtain formal confirmation as to whether works do or do not require planning permission, should you require a formal ruling on this matter then you would have to apply, with the payment of the appropriate fee, for a certificate of lawful development.