Lorton-based Shirley Contracting Co. has leased 770 square feet of downtown Fredericksburg office space in The Washington Building at 809 William St. The company handles transportation-related construction work including bridges, highways, roadways, paths and trails, railways and more. J.R. Burdette with Silver Commercial Brokerage represented the tenant, and Nick G. Calamos Jr. with Coldwell Banker Commercial, Carriage House Realty represented the landlord.