Since 1975, Keystone Structures has been manufacturing the finest quality preassembled buildings and structures for a vast array of industries including, petroleum, parking, industrial, security, transit, and sanitation.During this time, we have produced and delivered more than 8500 booths, guardhouses, convenience stores, restrooms, in-plant offices, and other prefabricated structures, enclosures and shelters for customers throughout the United States.Our booths are completely pre-assembled, wired, and outfitted in our 30,000 square foot production facility in Kennett Square, Pennsylvania.