Accessory Dwelling Unit (ADU) Permit in Montana
Compare accessory dwelling unit (adu) permit fees and requirements across the 6 Montana cities we cover. Every fee links to the city’s official source.
| City | County | Fee from | Details |
|---|---|---|---|
| Bozeman | Gallatin County | — | View → |
| Great Falls | Cascade County | $250 | View → |
| Helena | Lewis and Clark County | — | View → |
| Kalispell | Flathead County | $23.50 | View → |
| Missoula | Missoula County | $36 | View → |
| Unincorporated Yellowstone County | Yellowstone 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.