San Francisco, CA
Moscone Center Expansion
The expanded and improved Moscone Center creates fewer carbon emissions per visitor than any major convention center in North America.
Contra Costa County's East County has grown faster than its public infrastructure. For residents, accessing county services has meant navigating a fragmented system spread across multiple locations — a problem the East County Service Center is built to solve. The three-story facility in Brentwood will bring approximately 440 staff across nearly a dozen departments together under one roof, consolidating human services, public health, legal, elections, veterans services, probation, technology, and elected representation into a single accessible civic hub.
The building pairs flexible modern workspaces with indoor and outdoor public gathering areas designed to function as a genuine community destination. The program accommodates departments with meaningfully different operational needs — public-facing service counters, secure legal and probation functions, election infrastructure, and technology systems — requiring a facility plan that supports both common use and departmental separation.
The project is pursuing LEED v5 Platinum — a meaningful distinction from prior certification cycles. Where LEED v4 rewarded incremental efficiency gains, v5 requires a full decarbonization plan projected over 25 years, multi-attribute material optimization across health, social equity, and climate impact, and integrated design coordination that front-loads decision-making before construction begins. The East County Service Center is tracking 82 points against an 80-point Platinum threshold, driven by three core systems: geothermal heating and cooling, a mass timber structure selected specifically to reduce embodied carbon, and a microgrid with battery backup that makes the building off-grid survivable — keeping its two main assembly spaces operational as emergency cooling centers during outages. The project is already being studied across the design team's national studios as a template for integrating these systems under v5 rigor.
Webcor enters the project as the incumbent team from Contra Costa County's previous civic facility, the ADR Administration Building B — a relationship built on demonstrated performance that the county chose to extend into this next civic investment.

The expanded and improved Moscone Center creates fewer carbon emissions per visitor than any major convention center in North America.
