This link takes you to an article about the medieval church cottages in North Street, York, next to All Saints Church. The article is about all the cottages, which were built around the time of Richard III, but concentrates on one in particular, number 31 North Street. There are some excellent old photographs.
After standing empty and almost derelict, in the early 1970s the cottages were saved and turned into dwellings again.
Oh, and the article also tells of a small building that had some claims to being the ‘smallest house in England’!