Isolated, commercial real estate suffers from great fluctuation in needed capacity. In the course of a week, buildings change from empty to overfilled, forcing companies to rent more fixed office space to handle peak utilization or suffer crowded offices.
Combined, however, there is a surplus of space. It is estimated that 50% of all commercial real estate is vacant or unused at any given time. Because this space is not available for anyone else, it is necessary to continue constructing new buildings to meet market demand.