Abstract: A system for using real estate lease data has at least one property file stored on a data storage device and representing a property that has at least one leasable space, and a lease deal component operated by at least one processor and receiving data for a plurality of lease deals each with terms of a lease deal. At least one previously established lease deal has data for a lease deal, and is associated to at least one leasable space. This lease deal was established previously to at least one subsequent lease deal. The lease deal component links at least one subsequent lease deal to the at least one previously established lease deal to associate the at least one subsequent lease deal with an amount of leasable space linked to the previously established lease deal. A display displays lease terms or results of financial calculations or both of at least one linked lease deal.

Abstract: A system and method for analyzing property data includes accepting links from a plurality of property files and to at least one library on a data storage device. Each property file has data identifying a property. Thereafter, the system receives at least one set of assumptions of property data for storage at the at least one library. The system also permits the at least one set of assumptions to be selected for use with a plurality of the property files linked to the at least one library.