COVID-19 Update: We are masking and monitoring the vaccination status of all employees, subcontractors and visitors. 


  • Construction is our craft

    A rarity among large commercial contractors, Overaa is a self-performing builder. That means we draw upon our knowledge and experience to inform every decision – from designing concrete formwork to scheduling.

  • We are rock solid reliable

    Loyalty, humility and a can-do attitude are at the core of our company values. Our culture emphasizes continuous learning and improvement, community service, and long term employment. 

  • We love what we do

    We deliberately seek out technically challenging projects where creativity and genuine collaboration underpin every step of the project delivery process.

  • We are Overaa

    As a 4th generation family business we are passionately committed to our community. We are proud to have helped shape California’s infrastructure and grateful for our long-standing relationships. 


RICHMOND, Calif., October 14, 2021- C. Overaa & Co., a leading general contractor providing services to Northern California...

The Center – OUSD Central Commissary received a 2021 CA ENR Best Project Award, Northern California K-12 Education category. The lease-leaseback...

Our projects are in full swing and we are following the latest COVID-19 Prevention Emergency State Guidance including documenting the vaccination...

  • LABS
    • Design-Build
    • Berkeley, CA
    • 51,000 SF
    Lawrence Berkeley National Laboratory Advanced Light Source User Support Building
    This advanced sciences building was seamlessly integrated into the campus, featuring LEED Gold certified mechanical designs and state of the art systems. Through close collaboration with facility divisions, a sustainable, integrated systems approach that maximizes building flexibility and longevity was achieved.
  • TECH
    • Design-Build
    • Menlo Park, CA
    • 64,00 SF
    Stanford Linear Accelerator Research Building 52
    This LEED Gold certified facility supports scientists from around the world to control the multiple accelerators located on campus, hitting high energy efficiency goals with cutting edge technology.
    • Distribution Facility
    • Concrete Tilt Up
    • 171,000 SF
    Goodrick Industrial Building I & II
    The Goodrick Industrial Complex is a 171,000 SF industrial distribution center consisting of two concrete tilt-up buildings on a 10-acre site in Richmond, CA. Building One is a 133,000 SF building which will include 4800 SF of future office space. Building Two is a 58,000 SF building consisting 5,848 SF of future office space.
    • Preconstruction and Construction Services
    • Moraga, CA
    • 64,000 SF
    Saint Mary's College of California Recreation Center
    The 64,000 SF new recreation facility includes three full size sport courts, collegiate level pool complex, a rock climbing wall, fitness rooms, men and women locker rooms, conference rooms, multipurpose room and lobby. Overaa provided extensive preconstruction services and a design-assist delivery. The mechanical, electrical and plumbing as well as the pool was delivered through design-build.
    • Medical Training Facility
    • OSHPD Equivalent
    • 14,500 SF
    Veteran Affairs Palo Alto Mental Health Learning Center & Rose Garden
    The two story medical training facility includes auditorium, class rooms and open learning spaces. The structural steel building is clad in cementitious and aluminum panels with glazed curtain walls and aluminum fin break shapes.
    • Integrated Project Delivery
    • Oakland, CA
    • 392,800 SF
    Sutter Health Alta Bates Medical Center Parking Structure
    Using a form of contract in which the architect, owner and contractor share in the risk and reward, this 1067-stall parking structure was finished on schedule and under budget.
    • Design-Build
    • 88,500 SF
    • STEM campus
    Willie L. Brown Jr. Middle School
    An Exceptional California High Performing School project, the new design-build school campus consists of 88,500 SF of space featuring classrooms, administration, wellness center, multi-purpose room, library, kitchen, gymnasium, locker rooms, and computer lab. The project received the Design/Build Institute of America Western Region Pacific Distinction Award.
    • Renewable Power Generation
    • Oakland, CA
    • 10 MW
    EBMUD Power Generation Station
    Produces 10 MW of renewable energy to allow the Oakland Wastewater Treatment Plant to operate off the grid for the majority of the year.
    • Design Build
    • Pacific Grove, CA
    • 0.25 mgd
    Pacific Grove Water Recycling Project
    Between Pebble Beach and Monterey, CA, the facility is designed to eliminate potable water dependency and provide a sustainable source for recycled water for irrigation of the Pacific Grove Golf Course and parkland.