I have come home to find a 10-12 foot 'garden shed' within 10cm of my garden fence today. This thing is huge with a gable roof! I am estimating the height at the moment but it is way taller than the garden fences and at present can not see if it is one storey or two. I can not go and nosey as said neighbour is in and as it is a cut-de-sac, there is no excuse for me to be next to her house if she sees me! With my garden being L shaped, it us directly opposite my living room. It will surely block sunlight into half of my garden. What are the rule on height and proximity to boundaries pls? I am contemplating contacting the planning department this week or finding a bunch of termites.