Ok, thanks everybody. Just spoke with some woman at the planning department and she didn’t seem to have much of a clue. The main person that I needed to talk to wasn’t available and she tried to answer my questions as best she could. She told me that the original building didn’t even need to be structurally sound in order to get planning permission approved which seems strange. They were only interested if the design plans met with their approval, not the actual safety of the foundation structure. So in essence, the place could be ready to fall down but they would still consent to planning permission, strange.