We have found a massive terrace house which has loads of attic space which I am hoping to use as an artist's studio. The problem is that there is a chimney stack that is shared with the terraced house next door but that appears to be unsupported. Part of the stack appears to rest on our roof, but the main part of the chimney is attached to the neighbours house. The problem is that there is no trace of the chimney breast on the inside of the house in the attic, first floor or ground floor. It's such an old house this alteration is likely to have been done maybe 50 plus years ago. I know that people say if it hasn't collapsed, its probably OK but there are cracks in the wall of the downstairs WC. Should I just pass on this one? The vendor is not interested in dropping the price btw.