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HELPING TO BUILD
THE SILICON VALLEY

FOR OVER 100 YEARS

HELPING TO BUILD
THE SILICON VALLEY

FOR OVER 100 YEARS

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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.

Whether the job is simple or complex, OC McDonald provides the ultimate in quality, design, installation and aesthetics and our authorized service technicians keep your HVAC, plumbing and piping systems working their best.

Helping build the Silicon Valley for over 100 years, OC McDonald is the Bay Area’s turnkey mechanical contracting and servicing solution.

Superior Work and Service

From the time our founder, Oren Charles McDonald, installed the first air conditioning system in San Jose in 1906, we’ve been committed to providing superior work and service to every customer. We keep everything in house to ensure the highest possible quality. When you contract with us, we’ll fabricate the sheet metal and mechanical piping at our own facilities. That way we’ll be able to ensure that we meet all safety and quality standards.

We established our business to help customers like you with your construction projects. The scope or size of your undertaking makes no difference to us. Our contractors are up to the challenge.

© O.C. McDonald. All rights reserved.