INNOVATIVE TECHNOLOGY
+ OLD FASHIONED VALUES

SERVING THE GREATER SILICON VALLEY SINCE 1906

Construction

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.

Commercial

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.

Residential

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.

Clients

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:
(408) 295-2182

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