Urban Limit Line Renewal

The Contra Costa County Board of Supervisors has initiated work on a 2026 ballot measure to renew the County’s Urban Limit Line. The Urban Limit Line, initially established by Measure C in 1990, prevents sprawl and preserves open space by establishing a boundary beyond which no urban land uses can be designated. It ensures that urban development occurs within established communities where infrastructure and services already exist or are planned. The proposed renewal of the Urban Limit Line, including adjustments to the Line itself, are detailed in reports County staff presented to the Board of Supervisors on February 25, 2025, and June 24, 2025. The Board will consider approving a final ballot measure and an action to place the measure on the 2026 Primary Election ballot at a meeting in October or November of 2025. You can view the reports and accompanying materials from the two prior Board meetings below.