Nothing written, it was verbal. I have now lasered extension and it 20 to 25cm bigger than the planing permission. Obvious may not be 100% but i did it 3 times with the same figure and then just tested the laser in my house at the same distance.The plans show a gap between properties of approx 100 to 150mm. Having been out there with the owner he said it was accidental that it was built on the border. I don't think so.