Any help would be greatly appreciated. I have applied for permitted development for a 3m rear extension, part double height and part single height. The single height part of our application is because it will be within 2 metres of the boundary with our neighbours (max height of building allowed 3 metres). We were initially refused permitted development because apparently the application is considered as a whole in other words as the highest point of the application (the double height part of the application). Therefore contravening the height maximum height of 3 metres within 2 metres of our neighbours.
We subsequently reapplied only with the double height part of the extension which has been granted a certificate of lawfulness. We now would like to apply for the single part of the extension but have been told there has to be a small gap between the two rear extensions and they can’t be joined? I have scanned all the technical guidance and can’t find information on this anywhere. Would anyone be able to point me in the right direction please? Many thanks in advance!