Established in 1979, JG Construction is a family-owned business that offers commercial general contracting services. The company maintains a work force of several architects, engineers, designers and subcontractors. JG Construction provides planning, remodeling and tenant improvement services. The company operates JG Service Company, which provides a range of electrical services, including lighting and communication cabling. JG Service Company offers repair and maintenance services for heavy switchgears, transformers, breaker panels and switches, timers and photo controls. The company additionally provides 24-hour emergency services. JG Service Company also relocates and installs a variety of power systems. JG Construction is located in Chino, Calif.