O.C. McDonald Co., Inc.

For over a century, O.C. McDonald Co., Inc. has been the bedrock of mechanical contracting in the Greater Silicon Valley, providing unparalleled service since 1906. With a profound commitment to both innovative technology and old-fashioned values, they deliver a seamless blend of design, installation, and service for commercial new construction and retrofit projects. Their single-source project management approach is crafted to reduce complications and minimize costs, ensuring that each endeavor is handled with precision and efficiency.
In the bustling Bay Area, O.C. McDonald stands out as the go-to mechanical contractor, specializing in HVAC systems, plumbing, process piping, and building automation systems. Their expertise extends beyond mere installation — they are adept in the intricacies of direct digital control systems, ensuring that businesses operate at peak efficiency. Their reputation as a trusted partner in the commercial sector is highlighted by their dedication to integrating cutting-edge technology with proven industry practices.
For residential clients, O.C. McDonald brings over 100 years of experience to the table, tackling everything from basic heating and cooling systems to intricate custom installations. The company prides itself on its responsive customer service, available 24/7 to address emergencies with immediacy. With a team of skilled technicians only a call away, they are ever-ready to address any HVAC or plumbing issue, making homeowners feel secure and comfortable year-round.