This was a response to a forum thread (elsewhere) and something that has been touched on in an earlier blog.   I designed a small mock coach house, at the end of a very long  garden. (It was mock to the planners, and a possible nimby backlash, and their were no coaches) The site was less than 5.6m and agreement had been reached to build on the boundary thus leaving an internal width of 3.6m. Plainly there were no projections over the neighbour's land and the wall and gutters etc were d