Commissioners Approve Accessory Dwelling Unit Code Amendment — April 2026

Commissioners Approve Accessory Dwelling Unit Code Amendment — April 2026

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.

According to Emily Chen, director of Clerk & Recorder, this program served 58% more residents in 2026 compared to the previous year. “We’re seeing unprecedented demand from communities across Boulder County, particularly in Boulder and the surrounding area,” Emily Chen said.

The Clerk & Recorder processed over 9,238 applications last year, with an average processing time of 17 business days. Staff are available at the Boulder office Monday through Friday from 8:00 AM to 4:30 PM.

Frequently Asked Questions

Environmental review of the project area near Niwot Road found 7 sensitive species and 2 wetland areas requiring mitigation. The Clerk & Recorder worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

Residents in the Boulder area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Clerk & Recorder at (303) 441-1410 to verify eligibility and requirements.

Eligibility

Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $430,000, making it one of the largest collaborative efforts in the county’s history.