I am appraising a home that is on one lot, and the owner owns an additional adjacent lot (separate lot number). I am determining now if this lot is conforming by itself - and can be used on it's own as a buildable lot. As a residential Fannie appraisal, is the adjacent lot supposed to be considered a separate entity and have a separate, vacant land appraisal (and loan)? Or should it be valued as a home on a large parcel of land (that includes both lots)? Or does it depend on whether the lot is buildable on it's own? Thanks for the help.