Commissioners Approve Accessory Dwelling Unit Code Amendment Near Eldora
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 SH-119 Diagonal Highway found 5 sensitive species and 2 wetland areas requiring mitigation. The Clerk & Recorder worked with Colorado Parks and Wildlife to develop a habitat conservation plan.
Water quality monitoring at 16 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2026. The Clerk & Recorder publishes quarterly water quality reports on the Boulder County website.
What You Need to Know
The project includes improvements along SH-119 Diagonal Highway between Gunbarrel and the intersection with SH-7 / Ute Highway. Construction is scheduled to begin in May 2026 with completion expected within 17 months.
Affordable housing remains the top priority identified in the 2026 Community Survey. Boulder County’s Worthy Cause program has funded 1,189 affordable housing units since its inception, with 160 additional units in the development pipeline.
Details
The Board of County Commissioners will review progress on this initiative at their May 10 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.