Update: Commissioners Approve Accessory Dwelling Unit Code Amendment (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.
Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $297,000, making it one of the largest collaborative efforts in the county’s history.
Residents in the Niwot area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Public Health at (303) 441-6208 to verify eligibility and requirements.
What You Need to Know
Historical context: Boulder County was established in 1861 and covers 741 square miles of diverse terrain from the Great Plains to the Continental Divide. The county’s population of approximately 330,000 residents is served by 2303 county employees across 45 departments and offices.
A community information session will be held at the Niwot library on Tuesday, May 5 at 7:00 PM. Translation services in Spanish and Nepali will be available. The session will also be livestreamed on the Boulder County YouTube channel.
Timeline
Volunteers contributed over 4,123 hours to this program last year. The Public Health coordinates with 12 nonprofit partner organizations throughout Boulder County to deliver services.
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