O'brien Mechanical

O'Brien Mechanical Inc. II is a family-owned, full-service plumbing, piping, and HVAC contractor based in San Francisco, specializing in commercial projects across the Greater Bay Area. With a history dating back to 1970, the company prides itself on innovative engineering, quality craftsmanship, and exceptional customer service, employing over 90 skilled professionals to deliver comprehensive design, construction, and fabrication services.

Over the past five decades, O'Brien Mechanical has earned the trust of prominent building owners, architects, and general contractors, successfully completing projects in various sectors including residential, education, hospitality, industrial, healthcare, and commercial. Their extensive portfolio features notable clients such as Stanford University, UCSF, and the New Moscone Center, highlighting their expertise in complex plumbing, piping, and HVAC systems.

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