Countywide Mechanical Systems

While expanding our facilities, services, and capabilities to better serve current and future clients, Countywide Mechanical Systems remains dedicated to the same things that got us here - a commitment to quality, our community, and to fostering client relationships. Through trusted partnerships and proven construction methods, we keep San Diego and its surrounding areas operating and growing with our HVACR, plumbing, and design-build services. Located in El Cajon and Sacramento, California, Countywide Mechanical Systems serves multiple markets including student housing, central plants, mission critical, corrections, hospitality and entertainment, education, federal government, healthcare, public spaces, HVACR and plumbing service and maintenance, and more