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Douglas County residential solar permitting
Douglas County (unincorporated) handles residential solar permits through the Douglas County Building Division. Cities within the county have their own building departments.
Residential solar installations in unincorporated Douglas County are permitted through the Douglas County Building Division. Homes inside Castle Rock, Parker, Lone Tree, and Highlands Ranch community boundaries may fall under different jurisdictional processes. Confirm with the local building department before making assumptions about timeline or fees.
Last reviewed: 7/6/2026
Source: Douglas County Building Division