Individuals, co-partnerships or corporations whose primary purpose of the business is the ownership and/or management of an office, apartment, institutional, loft, public utility of other building requiring active supervision and management in Philadelphia, suburban counties, the State of Delaware and Southern New Jersey. Membership dues are based on the size of the building represented. The building is considered the member. 

All buildings, comprising a total project, to include any single building industrial properties; one to two stories in height, with more than 5% and less than 50% of office area.