A seismic shift toward highpaying jobs is coming to Maricopa, with farreaching impacts on commercial development, infrastructure, and property values. The City of Maricopa is expected to call for bids on the city's 680acre business triangle property.1. The Chase Tower With over 40 floors, the Chase Tower has been the tallest building in Phoenix since 1972. The 16,000 SF City of Maricopa Fire-Medical Administration Building is adjacent to a public works fleet facility and storage yard. The Maricopa County Security Building, once the tallest building in Arizona, has been entirely revitalized.