ADUs are allowed in Gallatin County / Bozeman AreaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Gallatin County / Bozeman Area, MT
Is your property eligible for an ADU?
# of Properties
28
Owner-occupied
43%
Zoning districts
11
Avg Home Value
$728,606
Median Lot Size
0.14 acres
Avg Income
$102,847
Residential Types:
28 housing units
Single Family
100%
Zoning Districts:
3,455 parcels · 11 districts
RS
45%(1,543)
AS
24%(833)
RX-MD
17%(579)
RX-HD
10%(342)
Other
5%(158)
ADU Rules
What can you build in Gallatin County / Bozeman Area, MT?
Gallatin County / Bozeman Area, MT follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size equal to 100% of the principal dwelling’s square footage
Detached ADU Size Limits
- –Detached ADU maximum size of 2,000 sq ft on lots at least 1 acre, or 1,200 sq ft on smaller lots.
- –Detached ADU size may not exceed the square footage of the principal dwelling.
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space per bedroom, max 2 spaces per ADU; no overall max stated; no ADU-specific exemptions; off-site parking not allowed for single- or two-family dwellings; parking cannot be in required front/side setback areas; one space may be in a driveway for detached single-family dwellings.
Rental Restrictions
- –Short-term rentals are prohibited for ADUs in the residential subdistricts where ADUs are permitted.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Montana municipalities
Rules change at the town line. Check the municipality your property is actually in.
Gallatin County
Bear CanyonBig SkyBozemanBozeman PassBridger CanyonEast GallatinFour CornersHebgen LakeHyaliteMiddle CottonwoodNorth GallatinReese CreekRiver RockSouth Cottonwood CanyonSouth GallatinSpringhillSypes Canyon 1Sypes Canyon 2Trail CreekUnincorporated GallatinWheatland HillsZoning District 1Zoning District 6