4 Gatehall Drive is a class A office property located at Mack-Cali Business Campus. LEED® for Existing Buildings: Operations & Maintenance™ Silver certified and a recipient of the U.S. Environmental Protection Agency (EPA)/U.S. Department of Energy's ENERGY STAR rating, this first-class building employs state-of-the art building systems, double-pane glazed windows, energy-efficient lighting systems, and occupancy sensors in common areas to ensure energy conservation.