Contra Costa County’s New Administration Building Tops Out

  • Rendering of the Contra Costa County Administration Building
  • Contra Costa County Administration Building Steel Topping Out Ceremony
  • Contra Costa County Administration Building Steel Topping Out Ceremony
  • Contra Costa County Administration Building Steel Topping Out Ceremony

On March 26, 2019, representatives from Contra Costa County in California, Fentress Architects, and Hensel Phelps celebrated the placement of the last piece of structural steel for the 71,000-square-foot county administration building. The setting of the final steel beam marks a significant milestone for the project as contractors near completion of the building’s frame. In a design-build collaboration, Hensel Phelps and Fentress Architects will create an efficient and community-friendly space with a distinctive administration building for the County. The $60 million building commenced construction in 2018 and is on schedule to open to the public by spring 2020.

Targeting LEED Gold certification, Fentress’ design for the facility creates an efficient and welcoming landmark for downtown Martinez and the surrounding community. The new building will house office space for a variety of county departments including a Board of Supervisors meeting chamber.

This milestone represents close collaboration with Contra Costa County, our design-build team, and the community. The new administration building will serve as a landmark for Martinez and provide Contra Costa County with a dynamic building that will allow better service to its citizens.

                                                           Curtis Fentress, Principal in Charge of Design at Fentress Architects

The four-story administration building’s rigid structural steel enclosure was achieved through the design-build team’s implementation of Moment Frames that enable the structure to efficiently manage gravity loads and seismic forces among its interconnected columns and beams. This system is also highly configurable and flexible, allowing for the integration of a structural steel system without compromising architectural style.

Working with a talented team of designers and builders has produced innovative structural solutions to meet an aggressive construction schedule.

                                                                                                                                               Curtis Fentress

Client: Contra Costa County, CA

Architect:  Fentress Architects

Contractor:  Hensel Phelps

Structural Engineer: Thornton Tomasetti

Construction Manager: Vanir

Location:   Martinez, CA

Program:  Office space for a variety of county departments, a large assembly chamber, conference rooms, work stations, and support spaces for the county.

Area:  71,000 square feet

Project Cost:  $60 million

Status:  Under construction, opening 2020

Sustainability: Slated for LEED Gold Certification

To download renderings © Fentress Architects:

To download topping out ceremony images © Fentress Architects (images 1-4) and © Hensel Phelps (images 5-8):

In the News

“Contra Costa County Celebrates ‘Topping Out’ of its New Administration Building”