+ OLD FASHIONED VALUES
SERVING THE GREATER SILICON VALLEY SINCE 1906
A full-service mechanical contractor, OC McDonald provides comprehensive design, installation and service for commercial new construction or retrofit. Our single-source approach allows us to manage all aspects of a project, reducing potential complications and minimizing costs for our customers.
We help you make the
best of your business
O.C. McDonald Company, Inc. has been the Bay Area’s most respected Mechanical Contractor for over a century, specializing in HVAC, plumbing, process piping, building services, direct digital control systems and building automation systems.
With over 100 years experience in heating and cooling, from basic to custom installations, we have the expertise to complete any job. Our technicians will work with you to find the best options for your needs.
24 HOUR EMERGENCY SERVICE
Your emergency is our emergency! When time is not on your side, call O.C. McDonald’s 24-hour live operator and we’ll have one of our many experienced technicians address your issue with speed!
24/7 LIVE OPERATOR: