CO · State directory
Colorado ADU rules
Official accessory dwelling unit regulations for 23 jurisdictions in Colorado, plus statewide law.
Not sure which city yet?
We have read the ordinances for 23 Colorado cities and lined them up side by side: detached vs internal, size limits, owner occupancy, and approval process.
Statewide ADU law
Colorado has state-level ADU legislation that applies across local jurisdictions. Local rules below may add requirements on top of state law.
Cities
Arvada6 sources · verified July 2026Aurora6 sources · verified July 2026Boulder6 sources · verified July 2026Broomfield6 sources · verified July 2026Castle Rock4 sources · verified July 2026Centennial6 sources · verified July 2026Colorado Springs6 sources · verified July 2026Commerce City6 sources · verified July 2026Denver7 sources · verified July 2026Durango5 sources · verified July 2026Fort Collins6 sources · verified July 2026Golden6 sources · verified July 2026Grand Junction6 sources · verified July 2026Greeley5 sources · verified July 2026Lakewood6 sources · verified July 2026Longmont5 sources · verified July 2026Loveland6 sources · verified July 2026Monument4 sources · verified July 2026Parker4 sources · verified July 2026Pueblo4 sources · verified July 2026Thornton4 sources · verified July 2026Westminster5 sources · verified July 2026
Counties & regions
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