September: 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.
Safety data from the Lyons area shows 5 reported incidents in the past 12 months, a 17% change from the previous year. The Sheriff’s Office has increased patrols along CO-72 Peak-to-Peak Highway and added community outreach programs in response to resident feedback.
The program is modeled after similar successful initiatives in Larimer County and Jefferson County. Boulder County’s version includes additional provisions for wildfire mitigation, affordable housing, and environmental sustainability.
Contact Information
The application deadline is June 29, 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 6 business days.
Public comment on this matter can be submitted through the Boulder County online portal, by email to Housing & Human 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.
Eligibility
The Housing & Human Services processed over 8,586 applications last year, with an average processing time of 7 business days. Staff are available at the Lyons office Monday through Friday from 8:00 AM to 4:30 PM.
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