File Form 1099-S to report the sale or exchange of real estate.
Generally, you are required to report a transaction that consists in
whole or in part of the sale or exchange for money, indebtedness,
property, or services of any present or future ownership interest in any
of the following:
Improved or unimproved l, including air space
Inherently permanent structures, including any residential, commercial,
or industrial building
A condominium unit its appurtenant fixtures common elements, including
Stock in a cooperative housing corporation (as defined in section 216)
Any non-contingent interest in sting lumber.