Great Falls Zoning & Land Use Guide
Last updated: Verified:
Key Zoning Facts
Regulatory Layers That Apply in Great Falls
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
State — Montana
- Building Code: Montana Building Code (based on 2021 IBC)
- State ADU Override: Yes (SB 528 and HB 211)
County — Cascade County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions.
Primary Zoning Districts
| District Code | Name | Min Lot | Max Height | Front Setback | Side Setback | Rear Setback | FAR |
|---|---|---|---|---|---|---|---|
| R-3 | Single-Family Residential | 7,000 sq ft | 35 ft | 25 ft | 5 ft | 20 ft | — |
| R-5 | Multi-Family Residential | 5,000 sq ft | 45 ft | 20 ft | 10 ft | 20 ft | — |
| C-2 | General Commercial | None | 50 ft | 0 ft | 0 ft | 10 ft | — |
ADU Rules in Great Falls
ADUs:Allowed
- Max Size
- 900 sq ft
- Max Height
- 24 ft
- Rear Setback
- 5 ft
- Side Setback
- 5 ft
- Parking
- None required (per state law SB 245)
- Owner Occupancy
- Not required (per state law)
- Permit Timeline
- 3-5 weeks
Official Sources
Frequently Asked Questions
Frequently Asked Questions
Can I build an ADU in Great Falls?
Yes. Montana state law (SB 528 and HB 211) requires cities to allow ADUs. Great Falls permits accessory dwelling units in residential zones with local size and setback standards, but cannot require owner occupancy or additional parking.
How do I find the zoning for my property in Great Falls?
Use the City of Great Falls online zoning map or contact the Planning & Community Development Department at (406) 455-8432 for property-specific zoning information.
What zones allow multi-family housing in Great Falls?
Multi-family housing is permitted in R-5 (Multi-Family Residential), R-6, and several commercial and mixed-use districts in Great Falls.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Zoning codes and building regulations change frequently. Always verify current requirements with your local planning department and building authority before making any decisions.