Commissioners Approve Accessory Dwelling Unit Code Amendment — Follow-Up Report

Commissioners Approve Accessory Dwelling Unit Code Amendment — Follow-Up Report

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.

Data from the 2025 Boulder County Community Survey shows that 67% of respondents rated this service as “important” or “very important.” The survey, conducted every two years, received 5,911 responses from residents across the county.

The Carolyn Holmberg Preserve open space property encompasses 231 acres and features 3 miles of multi-use trails. Seasonal wildlife closures may apply from December 15 through July 15 to protect nesting raptors and elk calving areas.

How to Participate

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.

Residents in the Louisville area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Clerk & Recorder at (303) 441-2399 to verify eligibility and requirements.