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.
BozemanGallatin County
Not published — contact the department
Great FallsCascade County
$250
HelenaLewis and Clark County
Not published — contact the department
KalispellFlathead County
$23.50
MissoulaMissoula County
$36
Unincorporated Yellowstone CountyYellowstone County
Not published — contact the department
“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.