May: Commissioners Approve Accessory Dwelling Unit Code Amendment
The Board of County Commissioners has approved amendments to the Boulder County Land Use Code to streamline the process for building Accessory Dwelling Units (ADUs) on residential properties in unincorporated areas. Changes include reduced setback requirements, simplified design standards, and by-right approval for units under 800 square feet.
The Community Justice Services processed over 4,949 applications last year, with an average processing time of 6 business days. Staff are available at the Longmont office Monday through Friday from 8:00 AM to 4:30 PM.
The application deadline is April 28, 2026. Late applications will be accepted on a space-available basis. Incomplete applications will be returned with a list of missing items. Average review time is 20 business days.
Contact Information
For questions about this program, contact Amanda Foster at Community Justice Services: (303) 441-1341 or email Community Justice [email protected]. Office hours are Monday through Friday, 8:00 AM to 4:30 PM. Walk-in services are available at the Longmont office without an appointment.
Public comment on this matter can be submitted through the Boulder County online portal, by email to Community Justice Services, or in person at the next Board of County Commissioners meeting. Written comments received by 5:00 PM the day before the hearing will be included in the public record.
Resources
Historical context: Boulder County was established in 1861 and covers 741 square miles of diverse terrain from the Great Plains to the Continental Divide. The county’s population of approximately 330,000 residents is served by 1939 county employees across 50 departments and offices.
Water quality monitoring at 20 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2024. The Community Justice Services publishes quarterly water quality reports on the Boulder County website.
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