Update: Commissioners Approve Accessory Dwelling Unit Code Amendment (2025)

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.

Affordable housing remains the top priority identified in the 2026 Community Survey. Boulder County’s Worthy Cause program has funded 513 affordable housing units since its inception, with 232 additional units in the development pipeline.

Wildfire risk mapping conducted by Wildfire Partners shows that 22% 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.

Related Programs

For questions about this program, contact David Thompson at Clerk & Recorder: (303) 441-5233 or email Clerk & [email protected]. Office hours are Monday through Friday, 8:00 AM to 4:30 PM. Walk-in services are available at the Louisville office without an appointment.

Funding of $290,000 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.