California ISO Headquarters

A design-build contract for California ISO’s new headquarters. This new 278,000 square-foot headquarters building will exemplify the client’s commitment to the environment, with the goal of attaining a green building LEED Gold certification (U.S. Green Building Council). The scope of work includes 30-acres of site clearing, creating utility infrastructure, installing perimeter security, and constructing a headquarters building and parking facilities.

Type of Work

Vanir’s services include project management throughout the design phase, and full owner’s representation during the construction phase. The building will be comprised of three distinct wings with a combination of structural systems:

  • Main Lobby: The lobby is part of a two-story public wing, which will feature glass and metal panels wrapped around a structural steel frame. It will include training rooms, an educational center and support facilities.
  • Mission Critical Wing: This wing will house a datacenter, mechanical and electrical utility systems, and the mission control room. It will have a structural steel frame and a precast wall façade.
  • Office Building: The office building will be three stories and will have exposed structural precast concrete and beams with a glass and metal panel façade. It will house a majority of California ISO’s more than 500 employees in an open office environment.


Folsom, CA


California Independent System Operator Corporation

Design Team

Dreyfuss & Blackford Architects


Clark Design/Build of California

Construction Cost

$158 million




278,000 SF