This industry comprises establishments primarily engaged in acting as lessors of real estate (except buildings), such as manufactured home (i.e., mobile home) sites, vacant lots, and grazing land. Cross-References. Establishments primarily engaged in-- ? Acting as lessors of buildings used as residences or dwellings including manufactured (mobile) homes on-site--are classified in Industry 531110, Lessors of Residential Buildings and Dwellings; ? Acting as lessors of buildings (except miniwarehouses and self-storage units) that are not used as residences or dwellings--are classified in Industry 531120, Lessors of Nonresidential Buildings (except Miniwarehouses); and ? Renting or leasing space for self-storage--are classified in Industry 531130, Lessors of Miniwarehouses and Self-Storage Units.