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§ 02
When a permit is required
Permit triggers and exempt work for Powell County
All new residential structures (intended for private dwelling or sleeping place for one or more people) and all new commercial structures require a building permit in unincorporated Powell County.
One-story detached accessory structures (e.g., tool sheds, storage buildings) with floor area less than 200 square feet and height less than 12 feet
Additions to existing residential-only buildings for non-habitable storage use (e.g., covered entryway, patio, deck, lean-to)
- Exempt One-story detached accessory structures (e.g., tool sheds, storage buildings) with floor area less than 200 square feet and height less than 12 feet
- Exempt Additions to existing residential-only buildings for non-habitable storage use (e.g., covered entryway, patio, deck, lean-to)
Note: Even if a structure is exempt from a building permit, other permits may be required, including: land use/zoning compliance, floodplain, plumbing, mechanical, and electrical permits. Work exempt from permits may still require compliance with zoning setbacks, floodplain regulations, and other local ordinances.
Required documents
- Completed Development Certificate or Conditional Use Permit application form
- Full set of construction plans (if substantial work) prepared by Registered Design Professional or Engineer
- Proof of property ownership or authorization
- Site plan showing setbacks and zoning compliance
- Evidence of consistency with Growth Policy
- Building code
- Montana Building Code 2021 (based on International Building Code 2021 with Montana amendments). International Residential Code (IRC) 2021 for residential projects. Electrical, plumbing, and mechanical work requires compliance with Montana Department of Labor & Industry standards and may require state-level permits.
- Permit validity
- Six months from permit issuance; construction must begin within this period or permit expires
§ 03
Application process
Typical processing: 2 weeks from date of receipt of completed application
- 01 Contact Powell County Planning Department at (406) 846-9795 to discuss project and determine permit type required
- 02 Obtain Development Certificate or Conditional Use Permit application form from Planning Department
- 03 Prepare complete application with required documents
- 04 Submit application to Powell County Planning Department
- 05 Planning Department conducts 2-week review period from date of receipt of completed application
- 06 Address any plan review comments in writing
- 07 Upon approval and fee payment, permit is issued
- 08 Construction must begin within six months of permit issuance or permit expires
Typical processing time: 2 weeks from date of receipt of completed application
§ 04
Fee schedule
Powell County building permit fees
Fee type
Amount
01
Permit fee formula
Development Certificates and Conditional Use Permits have fees determined by Planning Department; exact formula not specified in public documents. Contact department for quote on specific project.
Contact Planning Department for current fee structure
§ 05
Required inspections
Scheduling and sequence
How to schedule
- Call building inspector at least 24 hours before requesting an inspection (phone)
- Scheduling deadline
- 24 hours in advance
- Inspection hours
- Monday-Friday 8am-5pm
- Time windows
- Inspector has 72 hours from notification to perform requested inspection
Typical sequence: Specific inspection sequence not documented in available sources; contact Planning Department for details specific to your project type (e.g., foundation, framing, final).
§ 06
Frequently asked
Common questions about unincorporated Powell County permits
01 Do I need a building permit in unincorporated Powell County, MT? ▸
All new residential structures (intended for private dwelling or sleeping place for one or more people) and all new commercial structures require a building permit in unincorporated Powell County.
02 How much does a building permit cost in unincorporated Powell County, MT? ▸
Building permit fees in unincorporated Powell County, MT are set by the local building department and vary by project type and valuation. Fees are calculated as: Development Certificates and Conditional Use Permits have fees determined by Planning Department; exact formula not specified in public documents. Contact department for quote on specific project..
03 How do I apply for a building permit in unincorporated Powell County, MT? ▸
To apply for a building permit in unincorporated Powell County, MT, follow these steps: 1. Contact Powell County Planning Department at (406) 846-9795 to discuss project and determine permit type required 2. Obtain Development Certificate or Conditional Use Permit application form from Planning Department 3. Prepare complete application with required documents 4. Submit application to Powell County Planning Department 5. Planning Department conducts 2-week review period from date of receipt of completed application 6. Address any plan review comments in writing 7. Upon approval and fee payment, permit is issued 8. Construction must begin within six months of permit issuance or permit expires
04 How long does it take to get a building permit in unincorporated Powell County, MT? ▸
Building permit processing times in unincorporated Powell County, MT typically run 2 weeks from date of receipt of completed application. Timelines can vary based on project complexity and current department workload.
05 What work is exempt from building permits in unincorporated Powell County, MT? ▸
Not all construction work requires a permit in unincorporated Powell County, MT. The following work is generally exempt: One-story detached accessory structures (e.g., tool sheds, storage buildings) with floor area less than 200 square feet and height less than 12 feet; Additions to existing residential-only buildings for non-habitable storage use (e.g., covered entryway, patio, deck, lean-to). Note: Even if a structure is exempt from a building permit, other permits may be required, including: land use/zoning compliance, floodplain, plumbing, mechanical, and electrical permits. Work exempt from permits may still require compliance with zoning setbacks, floodplain regulations, and other local ordinances. When in doubt, confirm with the local building department before starting work.
06 How do I schedule a building inspection in unincorporated Powell County, MT? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Powell County, MT via: Call building inspector at least 24 hours before requesting an inspection. 24 hours in advance.
last verified March 2026
source Powell County Planning Department ↗
entry id permits/montana/powell/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Powell County Planning Department before applying. Jaspector is not legal advice.