Keystone Construction Company is a St. Louis-based general contractor with expertise in design/build projects for office, retail, industrial and healthcare clients. For nearly 35 years, Keystone projects have reflected the company’s commitment to superior architecture and design, quality materials and craftsmanship that stand the test of time. The general contractor has received numerous design and construction awards, including Building St. Louis awards in 2017, 2019 and 2021; Project 64 West Excellence in Community Development Award; and Excellence in Design Award from American Builders Company and Nucor.  Harvard University chose Keystone’s unique process for a course study called “How to do Design/Build Right.” For more information, visit https://keystone-stl.com.