Hi, I am currently designing a rear extension to my end of terrace house that was built over 100 years ago. I’ve got 2 questions, firstly, the house used to have a rear toilet stuck on the very back of the house. This was demolished before I bought the house but I have found an old OS map from 2013 that shows it. Would the rear of the toilet be considered the rear of the ‘original house’ as it stood in 1948 even though it has been demolished for a few years? This is important as, when taking into account the toilet, the length of the extension is less than 3m meaning I can avoid prior approval. It was built from brick and a few of the houses in the terrace still have them. I might try to get an LDC to confirm but would appreciate some advice at this point.Secondly, Pretty sure the answer is no, but are there any limits on the width of a rear extension (other than not being any wider than the house)? I know there is for side extensions but can’t see anything on rear extensions? The design is about 2/3 the width of the house. Thanks!