• Committed to:

    Performance Based Innovation and Creative Results to Exceed Customer Expectations - See Our Services

  • Committed to:

    Offering the highest customer care and expertise - See Our Services

  • Committed to:

    Giving Back to Our Community and Evolving the Field of Construction for the Future - See News and Events

  • Committed to:

    Setting our sights on the brightest and best workforce. Job satisfaction and a healthy work-life balance is our priority - See Onyx Team

We are Onyx Building Group

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Featured Work

Pacific Highlands Ranch Fire Station

Located in the Carmel Valley area of San Diego, this 10,500 sq. ft. LEED silver certified facility consists of a three-bay semi-rural station that houses 11 fire-rescue personnel including a Battalion Chief.

Moscone Center Expansion

Located in San Francisco, the Moscone Center Expansion will add over 300,000 square feet of space, with 157,000 sq. ft. being dedicated to exhibits. This $551 million project (GC - Hunt Construction) will be completed at the end of 2018.

Maple Street Correctional Center

This 257,000 sq. ft., $165 million correctional facility in Redwood City, Calif., is a LEED Gold model for corrections with sizable space for inmate programs, natural light and ventilation. 

Architect: HOK

Vista Civic Center

This 3 story, 103,000 sq. ft. building, serves as a space for City Council Chambers and offices. A community center with an alternate use as an emergency operations center is also available for use by the public.

General Contractor: Highland Partnership, Inc.

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Every project is a new challenge to produce something unique.

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News and Events

2018 Women's Build

May 5, 2018

Onyx was proud to be part of Habitat for Humanity's 2018 Women's Build. Giving back to the community is a priority for us at Onyx and we pride ourselves in being resourceful and well-integrated with others in the construction field.

Sycuan Casino and Resort Expansion

March 15, 2018

Onyx is happy to announce to be joining the team over at Sycuan Casino and Resort and will be installing an integrated plaster system for exterior conditions.

2017: Year in Review

January 1, 2018

2017 presented Onyx Building Group many successful opportunities to implement design solutions in high-end, custom projects throughout California.

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555 Raleigh Ave El Cajon, CA 92020 | P: (619) 324-1440 F: (619) 324-1441
Department of General Services Small Business Certification # 1547520 (exp 2/28/19)
California Public Utilities Commission Woman-Owned Business Certification # 14040093 (exp 7/17/19)
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