This is a strange one. I have appraised many house's that the owners had an undivided interest in an adjoining or nearby lot. Its pretty common around here for several homes to share ownership of a lake front lot. I just got a request from a Bank for a driveby on a new construction. Very low loan to value on this one. When I got the deed from him, it turns out the owner is building on a tract of land that he has a 1/2 undivided interest in. I don't know if the both owners have to sign the mortgage or not. What happens if it were to end up in foreclosure? Just never seen this before. It appears since he only owns half the lot then then my appraised value only includes half the lot value. I am serious considering just making the assumption that he owns the lot and disclose the mess and let the bank worry about it. Thank goodness it is a narrative and not on the forms! Got any advice on this one?