Single storey rear extension

[Michael White]

Further to my last question, if a rear single-story extension is built under permitted development on a semi-detached property, and the roof i.e. tiles and wooden roof (no gutter on the side of the roof) overhangs the boundary line by about 20cm and the side brick wall crosses the boundary line by about 2 cm, can the local authority assist with this problem? I'm a bit confused as it has been done under permitted development.

[Ian Walmsley]

It doesn't sound like it complies with permitted development as it isn't all within the curtilage of the dwellinghouse. 

Therefore would require retrospective planning permission or potentially removal. 

Your only option is to enquire with the enforcement team at the local authority. They can enforce the situation if necessary.