Accessory Structures in Eagle County, CO (2026)

ADU Rules

Unincorporated Eagle County (the Vail/Beaver Creek/Avon area outside town limits) allows accessory dwelling units in most residential and resource zone districts under the Eagle County Land Use Regulations (ECLUR), Article 3. ADUs are a use by right in the Resource (R) zone and require Limited Review in the Resource Limited (RL), Agriculture Limited (AL), Agriculture Residential (AR), Rural Residential (RR), and Residential Suburban Low Density (RSL) districts, subject to minimum lot size standards. Detached ADUs are typically capped at 850 square feet and intended for caretakers, persons who live and work in Eagle County, or relatives and guests. The towns of Vail and Avon have separate zoning codes (Vail uses an Employee Housing Unit framework). Eagle County is outside Colorado's five metropolitan planning organizations and is therefore not a 'subject jurisdiction' under HB24-1152.