September: Commissioners Approve Accessory Dwelling Unit Code Amendment

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.

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.

Funding of $214,000 for this initiative comes from a combination of federal grants, state matching funds, and the Boulder County General Fund. The Board of County Commissioners approved the allocation during the 2026 budget session.

Related Programs

Environmental review of the project area near SH-119 Diagonal Highway found 6 sensitive species and 3 wetland areas requiring mitigation. The Community Justice Services worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

Transportation access remains a key concern. Boulder County’s Via mobility program provides door-to-door transit service for residents in Erie and surrounding communities who cannot access fixed-route bus service. RTD routes B, J, and BOLT serve major corridors.

How to Participate

Safety data from the Erie area shows 37 reported incidents in the past 12 months, a 23% change from the previous year. The Sheriff’s Office has increased patrols along SH-119 Diagonal Highway and added community outreach programs in response to resident feedback.