Long shot but I am investigating converting a garage into an annexe. However, the planning portal doesn't really help as to whether pp is required. It is a property in an AONB with, I suspect, permitted development rights removed, but there would be no alteration at all to the exterior of the garage; it already has enough windows and doors. It would purely be interior work as far as I can tell. If I contact the council I will have to pay so I wondered if anyone else has experience of this? Thanks