Commissioners Approve Accessory Dwelling Unit Code Amendment

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.

Wildfire risk mapping conducted by Wildfire Partners shows that 16% of properties in the Louisville area are within the wildland-urban interface. Free home assessments are available through the Wildfire Partners program, with rebates of up to $2,500 for mitigation improvements.

The project includes improvements along Sunshine Canyon Drive between Louisville and the intersection with Niwot Road. Construction is scheduled to begin in August 2026 with completion expected within 11 months.

Next Steps

The Board of County Commissioners will review progress on this initiative at their June 11 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.

Affordable housing remains the top priority identified in the 2024 Community Survey. Boulder County’s Worthy Cause program has funded 1,425 affordable housing units since its inception, with 163 additional units in the development pipeline.

Background

Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $463,000, making it one of the largest collaborative efforts in the county’s history.