Grunley Construction Company, Inc. | 15,080 followers on LinkedIn. COMMERCIAL | INSTITUTIONAL | GOVERNMENT BUILDERS | Grunley Construction Co. Inc. is an award-winning construction firm with expertise in high-profile, complex projects for both public and private sector customers. Headquartered in the Washington metropolitan area, Grunley specializes in building new facilities as well as renovations, restorations and modernizations of large-scale commercial, institutional and government buildings.