A form of real estate ownership of a multi-unit housing structure by a non-profit corporation which leases portions of the property to its stockholders. The stockholders are part owners of the corporation; they do not own their own apartments. Periodic payments, usually monthly, by stockholders are used to meet costs of ownership, such as mortgage payments, property maintenance, taxes, and repairs. Such shareholding by the tenant allows him to occupy a dwelling unit while not possessing direct title to it.