State Of California Office Buildings 8 & 9

Renovations of these two 18 floor towers, including 632,000 SF of office space for the State of California included the implementation of new mechanical, electrical, and telecommunications systems, structural upgrades addressing seismic consideration, overall building upgrades meeting current code requirements, and minor repairs to the exterior shell.

A new 12,000 SF addition provided a central secured lobby and checkpoint to serve both buildings, second-level walkway connection OB8 and OB9. Goals for this project included meeting or exceeding all appropriate California Tier 1, Tier 2, and Title 24 design criteria and achieving a LEED Silver Certification through USGBC. As part of the renovation scope, Capital replaced the existing primary and secondary dual duct air distribution system with a new pressure-independent dual-duct VAV air distribution system with chilled water and steam served via the State’s central utility plant.

The chilled water is supplied through various A/C coils via base-mounted lead-lag pumps with VFDs. Energy-efficient measures include premium efficiency motors on all new 1 HP and larger motors with VFD motor speed controllers for all new motors over 10 HP, variable volume distribution, both air and water, demand-controlled ventilation via carbon dioxide sensors in the return air duct and full DDC energy management and control system with optimized system start and shut-off and reset of supply air and water temperatures.

State of California 

Sacramento, CA 


Project Value

Project Area
632,000 SF 

Completion Date

Mechanical Engineering
Plumbing Engineering
Fire Suppression Engineering
Title 24 Energy Analysis
LEED Documentation 

LEED for New Construction Gold Certification