I'm interested in an amazing house which has a fairly large annexe. At the moment the annexe is lived in by the owner's elderly parents, but the only way we could afford the house would be to rent it out (or even sell it). Does anyone have any experience of doing similar? What are the implications likely to be for the mortgage? planning? insurance? Where would be the best place to go to find out? The annexe has an independent entrance, but at the moment there is one internal door (which obviously could be closed).