Accessory Dwelling Unit (ADU) Rules for Trail Creek, MT

Is your property eligible for an ADU?

# of Parcels

332

Avg Parcel Value

$887,559

Median Parcel Size

20.01 acres

ADU Rules

What can you build in Trail Creek, MT?

Trail Creek, 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 of 1,000 sq ft for internal or attached ADUs: by right in AR-20 and capped at 1,000 sq ft within a PUD overlay.

Detached ADU Size Limits

–Maximum 1,000 sq ft for detached ADUs by right in the AR-20 district.
–In PUDs, an accessory rental/guest unit is capped at 1,000 sq ft.

Max Units

–1 rental living unit or guest unit not to exceed 1,000 sq ft

Parking

–2 spaces/dwelling unit (PUD); AR-20 ADUs have no stated parking standard; all residential parking off-street

Rental Restrictions

–ADU for agricultural employees only; occupancy restricted to agricultural employees (no general public rental).

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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Is your property eligible for an ADU?

ADU rules in other Montana municipalities

Rules change at the town line. Check the municipality your property is actually in.

Gallatin County

See all municipalities in Gallatin County →See all Montana municipalities →

Browse addresses by ZIP in Trail Creek

59715219 addresses