Established in 1984, Capitol Contractors is a locally owned and operated company that serves the mechanical contracting industry in northern Virginia. It provides plumbing, mechanical piping, ductwork, insulation, controls and utility installation services. The company serves military bases, government installations, commercial locations, industrial plants and municipalities. Capitol Contractors specializes in plan and specification work, design-build projects and maintenance contracts. It maintains a team of mechanics, technicians and management personnel. The company has completed projects for the Boscobel east and west waterlines, a naval research laboratory, raw water treatment facility, South George Mason Drive water main and Hilldrups sewage pump station.