Established in 1906 by Oren Charles McDonald, O.C. McDonald Company has been providing high-quality plumbing, process piping, and HVAC services to the Bay Area for over a century. As pioneers in the industry, the company installed the very first air conditioning system in the city of San Jose, setting the stage for a legacy of innovative installations and complex projects.

Under the leadership of Jim McDonald, the founder’s great-grandson, O.C. McDonald Company continues to uphold the same core principles of exceptional workmanship, traditional values, and technical innovation. The company prides itself on offering superior customer service, unfailing quality, steadfast reliability, and continuous innovation, always delivered on schedule and within budget.

At O.C. McDonald Company, we take pride in our long history of serving the community, and we remain committed to meeting the evolving needs of our clients. Whether you require routine service, emergency repairs, or new installations, you can rely on us to provide expert solutions tailored to your specific requirements. Trust O.C. McDonald for all your plumbing and HVAC service, repair, and installation needs – experience the difference of partnering with true professionals who stand behind their promises.

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