How would you approach appraising two houses on one lot. Property is 5 acres, and according to homeowner, this is permitted by zoning? Problem is, this scenario is not at all common in this market. I have seen "carriage houses" built next to 3,000+ square foot homes, in older neighborhoods in a few instances, but even these properties rarely sell. It also occurs in $500K+ neighborhoods, but this is more of a $250-300K market. This property has a 1,500 square foot home and a 1,000 square foot home. I'm guessing the second house isn't going to add much to the value. Superadequate? I have already done a preliminary search and nothing remotely similar came up. The first thing I did was to call the client and find out if they want me to proceed under the circumstances. Oh yeah, and fee increase was immediately requested. This is going to be a learning experience.