Current situation is domestic corner semi with a 2' high perimeter wall, immediately behind which are 6-7' high fencing panels. The wall and the fence panels are in a bad state and need rebuilding / replacing.
Another problem is various feral chavs seem to like sitting on the wall, and using the space between the wall and the fence as a garbage disposal unit for their empty beer/vodka bottles and who knows what else.
The plan is to rebuild the wall to about 5' high, with 2' wooden panels on top (so it doesn't look too 'Prisoner').
The question is, do I need to bother the council for planning permission to do this, given that the overall height isn't being increased?