Helena Zoning & Land Use Guide
Key Zoning Facts
Helena Zoning Overview
Helena is Montana's state capital, situated in the western part of the state in the Helena Valley at the eastern slope of the Continental Divide. As the seat of state government, Helena's economy is anchored by public-sector employment, supplemented by healthcare, education, and a growing outdoor recreation sector. The city's zoning code, administered by Community Development, reflects a mature community balancing historic preservation with growth.
Helena's historic Last Chance Gulch downtown, built during the gold rush era, is a focal point of the city's character and planning efforts. The city has worked to revitalize this corridor while managing residential growth in the surrounding valley. Helena's growth policy emphasizes infill development, neighborhood connectivity, and maintaining the visual relationship between the city and its mountain backdrop.
Key Zoning Districts
Helena's zoning includes residential districts from R-1 (Rural Residential) through R-4 (Multi-Family), business districts B-1 through B-3, and industrial zones. The city has overlay districts for the historic downtown area and floodplain areas along Prickly Pear Creek and Last Chance Creek.
ADU Regulations
Under Montana state law (SB 528 and HB 211), Helena must allow accessory dwelling units in residential zones. The city cannot require owner occupancy or mandate additional parking for ADUs. Helena's older neighborhoods, with their established lots and alley access, are well-suited for ADU development.
Development Process
Development in Helena begins with a pre-application meeting with Community Development staff. Building permits require plan review and inspections. Zoning changes and conditional use permits are reviewed by the Zoning Commission and Helena City Commission.
Regulatory Layers That Apply in Helena
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 — Lewis and Clark 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
- Min Lot
- 6,000 sq ft
- Max Height
- 35 ft
- Front Setback
- 20 ft
- Side Setback
- 5 ft
- Rear Setback
- 20 ft
- Min Lot
- 5,000 sq ft
- Max Height
- 45 ft
- Front Setback
- 15 ft
- Side Setback
- 8 ft
- Rear Setback
- 20 ft
- Min Lot
- None
- Max Height
- 45 ft
- Front Setback
- 0 ft
- Side Setback
- 0 ft
- Rear Setback
- 10 ft
ADU Rules in Helena
- 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
Permit Costs & Timelines
Permit Costs & Timelines
Specific permit fee schedules for Helena are available from the local planning department. Fees vary based on project type, scope, and valuation.
Check Helena permit fees →