O'Brien Mechanical, Inc.

1515 Galvez Avenue, San Francisco, CA, 94124

3.7(3 Google reviews)View on Google

RTUAHUChilled Water/ChillerBoilerSplit SystemVRF/VRV System

Quick Answers

What makes O'Brien Mechanical, Inc. a strong choice for commercial HVAC in San Francisco, CA?

O'Brien Mechanical, Inc. is a family-owned, full-service HVAC and plumbing contractor headquartered in San Francisco that has been operating since 1970, employs over 90 union-affiliated professionals, and generates more than $18 million in annual revenue serving the Greater Bay Area. Their half-century track record includes landmark commercial projects at Wells Fargo Headquarters, UCSF Stanford Health Care, and the Moscone Convention Center.

Does O'Brien Mechanical, Inc. handle commercial HVAC replacement?

O'Brien Mechanical, Inc. self-performs full design, construction, and fabrication for commercial HVAC systems, which includes replacement work across building types such as office buildings, healthcare facilities, and industrial warehouses. Facility managers seeking a replacement quote can contact O'Brien Mechanical directly to discuss project scope within their 25-mile service radius of San Francisco.

Does O'Brien Mechanical, Inc. service Rooftop Units for commercial buildings?

O'Brien Mechanical, Inc. services Rooftop Units (RTUs) as part of its commercial HVAC offering, alongside Air Handling Units, Chilled Water/Chiller Systems, Boiler Systems, Split Systems, and VRF/VRV Systems. Their union-affiliated trades people handle these systems across office buildings, retail spaces, healthcare facilities, educational institutions, government buildings, and industrial warehouses throughout the San Francisco Bay Area.

About

O'Brien Mechanical, Inc. is a family-owned, full-service commercial HVAC and plumbing contractor headquartered at 1515 Galvez Ave in San Francisco, CA, with over five decades of project experience across the Greater Bay Area. Founded in 1970 and reorganized as O'Brien Mechanical, Inc. II in 1998, the company employs more than 90 union-affiliated and administrative staff and generates well over $18 million in annual revenue. That scale means OBMI can self-perform complex design, construction, and fabrication work in-house rather than subcontracting critical trades — a meaningful advantage for facility managers running tight project schedules. Their commercial HVAC scope covers Rooftop Units, Air Handling Units, Chilled Water and Chiller Systems, Boiler Systems, Split Systems, and VRF/VRV Systems. The building-type portfolio is equally broad, spanning office buildings, retail spaces, industrial and warehouse facilities, healthcare facilities, educational institutions, and government buildings — all served within a 25-mile radius of San Francisco. OBMI's project history reflects the depth of that experience: past work includes mechanical systems at Wells Fargo Headquarters on California Street, UCSF Stanford Health Care's Mount Zion Cancer Center, the Moscone Convention Center, and United Airlines facilities at SFO. Property and facility managers throughout the Bay Area who need a contractor with documented performance on large, complex commercial mechanical projects will find O'Brien Mechanical's track record relevant to their evaluation.

Frequently Asked Questions

What building types does O'Brien Mechanical, Inc. serve in the San Francisco Bay Area?

O'Brien Mechanical, Inc. services office buildings, retail spaces, industrial and warehouse facilities, healthcare facilities, educational institutions, and government buildings. Past project references include Stanford University, UCSF Stanford Health Care, the Moscone Convention Center, and Charles Schwab's 101 Montgomery Street office building.

Is O'Brien Mechanical, Inc. capable of handling large-scale commercial HVAC construction projects?

Yes — O'Brien Mechanical, Inc. is a full-service mechanical contractor with over 90 union-affiliated employees and more than $18 million in annual revenue, structured to self-perform design, construction, and fabrication on complex commercial projects. Their portfolio includes large institutional and hospitality projects such as hotel renovations, hospital facilities, and major convention center work in San Francisco.

What types of commercial HVAC systems does O'Brien Mechanical, Inc. install and service?

O'Brien Mechanical, Inc. works with Rooftop Units (RTUs), Air Handling Units, Chilled Water and Chiller Systems, Boiler Systems, Split Systems, and VRF/VRV Systems. This range covers the primary commercial HVAC configurations found in San Francisco office towers, healthcare campuses, and industrial facilities.

How far does O'Brien Mechanical, Inc. travel for commercial HVAC and mechanical projects?

O'Brien Mechanical, Inc. operates within a 25-mile service radius of its San Francisco headquarters at 1515 Galvez Ave, covering much of the Greater Bay Area. Past project locations listed on their site include San Francisco, Palo Alto, San Rafael, Union City, and Richmond.

Does O'Brien Mechanical, Inc. work on healthcare and government HVAC projects?

O'Brien Mechanical, Inc. has documented experience in both healthcare and government facilities, with past projects including the UCSF Stanford Health Care Mount Zion Cancer Center, the U.S. Veterans Ambulatory Facility, and the State of California Transbay Terminal in San Francisco. Facility managers in these regulated sectors can reference that portfolio when evaluating OBMI for sensitive or code-intensive mechanical work.

Equipment & Systems

System Types Serviced

Rooftop Unit (RTU)Air Handling Unit (AHU)Chilled Water / ChillerBoilerSplit SystemVRF / VRV System

Building Types Served

Office Building

Retail / Shopping Center

Industrial / Warehouse

Healthcare / Medical

Education / Campus

Government / Municipal

License & Insurance

Insurance VerifiedNot verified

Location

1515 Galvez Ave, San Francisco, CA 94124, USA

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Commercial Capabilities

24/7 AvailabilityNo

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Google Reviews

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2 months ago

Called O'Brien Mechanical Inc. after noticing a problem at home, and they handled it professionally. No delays, no confusion—just straightforward service and fair pricing.

— FAN YAN NAM

4 years ago

— Paul Swartfager

5 years ago

— Chris Redinger

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