i would think it likely that you could as it is not a permanent fixture that you would need planning for..the neighbour has no right to gaze over to your house and as long as your not blocking day light from her home i cant see any problem at all......think about it....you can build a six foot wall or grow an hedge so why not a summer house......if you don't get on with the nosey old bat then post a letter of what you intend to do and the size of it and let her threat about it and do all the running around to find out.if she is awkward do it anyway he he
Source(s):
am i getting it right here? isn,t a summer house like a wooden structure ie a shed? some people have answered as though it is a brick like structure where of course you would not be allowed to do it too close to fence/wall and certainly would need planning permission to build anything pemanant