Accessory Dwelling Unit (ADU) Permit in Colorado
Compare accessory dwelling unit (adu) permit fees and requirements across the 10 Colorado cities we cover. Every fee links to the city’s official source.
| City | County | Fee from | Details |
|---|---|---|---|
| Arvada | Jefferson County | $34 | View → |
| Aurora | Arapahoe County | $1.30 | View → |
| Boulder | Boulder County | — | View → |
| Colorado Springs | El Paso County | — | View → |
| Denver | Denver | $35 | View → |
| Fort Collins | Larimer County | $6,925 | View → |
| Lakewood | Jefferson County | $26.00 | View → |
| Longmont | Boulder County | $5,000 | View → |
| Thornton | Adams County | — | View → |
| Westminster | Adams County | — | View → |
“Fee from” is the starting figure from each city’s published schedule — open a city for the full schedule, required documents, and source citations. Not legal advice.