Urban Limit Line Renewal

On December 9, 2025, the Contra Costa County Board of Supervisors voted to place a measure to renew the County’s Urban Limit Line on the June 2, 2026, primary election ballot. 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 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, June 24, and December 9, 2025. You can view the reports and accompanying materials for these Board meetings below.