Office/Retail Space for Lease in Riverdale Just off of GA HWY 85. Building is undergoing interior and exterior renovations. HWY 85 is a heavily traveled major thoroughfare from Columbus, GA through many counties including Coweta, Fayette and Clayton counties. The City of Riverdale is located in Clayton County, approximately 10 miles south of Atlanta. The City is only 5 miles south of Atlanta’s Hartsfield-Jackson International Airport, one the nation’s busiest airports.