Commissioners Approve Accessory Dwelling Unit Code Amendment — December 2025
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 Board of County Commissioners will review progress on this initiative at their April 26 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.
Residents in the Lafayette area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Transportation at (303) 441-3008 to verify eligibility and requirements.
What You Need to Know
Colorado state law requires all counties to provide these services to eligible residents. Boulder County exceeds minimum state requirements by offering expanded hours, multilingual support, and online access. In 2024, the county received a state award for excellence in service delivery.
Eligible participants include Boulder County residents with household incomes at or below 40% of Area Median Income (AMI). For a family of four, this is approximately $100,000 per year. Applications are processed on a first-come, first-served basis.
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