Commissioners Approve Accessory Dwelling Unit Code Amendment — Fourmile Canyon Area

Commissioners Approve Accessory Dwelling Unit Code Amendment — Fourmile Canyon Area

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.

Environmental review of the project area near 75th Street found 3 sensitive species and 1 wetland areas requiring mitigation. The Sustainability, Climate Action & Resilience worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

For questions about this program, contact Michael Kowalski at Sustainability, Climate Action & Resilience: (303) 441-2140 or email Sustainability, Climate Action & [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.

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

The project includes improvements along 75th Street between Louisville and the intersection with Baseline Road. Construction is scheduled to begin in August 2026 with completion expected within 17 months.