Longmont Community Briefing: 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.
Environmental review of the project area near Left Hand Canyon Drive found 5 sensitive species and 4 wetland areas requiring mitigation. The Community Planning & Permitting worked with Colorado Parks and Wildlife to develop a habitat conservation plan.
Data from the 2025 Boulder County Community Survey shows that 71% of respondents rated this service as “important” or “very important.” The survey, conducted every two years, received 3,633 responses from residents across the county.
What You Need to Know
Residents in the Boulder area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Community Planning & Permitting at (303) 441-9797 to verify eligibility and requirements.
Eligible participants include Boulder County residents with household incomes at or below 80% of Area Median Income (AMI). For a family of four, this is approximately $55,000 per year. Applications are processed on a first-come, first-served basis.
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