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§ 02
When a permit is required
Permit triggers and exempt work for Carter County
Prior to start of construction for any building being built, remodeled, moved, or undergoing change of occupancy (except exempt categories)
Farm and ranch buildings
Mining buildings on mining property
Petroleum refineries and pulp/paper mills (except office and shop buildings)
Residential buildings containing fewer than five dwelling units (excluding facilities serving transient guests)
Private garages and private storage buildings for personal use only (not part of commercial enterprise)
General finishing work such as painting and tiling
- Exempt Farm and ranch buildings
- Exempt Mining buildings on mining property
- Exempt Petroleum refineries and pulp/paper mills (except office and shop buildings)
- Exempt Residential buildings containing fewer than five dwelling units (excluding facilities serving transient guests)
- Exempt Private garages and private storage buildings for personal use only (not part of commercial enterprise)
- Exempt General finishing work such as painting and tiling
Note: Additional work may be exempt; inquiry to the bureau may be required to determine permit necessity
Required documents
- Construction plans
- Building Permit/Plan Review Application form
- Commercial building checklist (for commercial projects)
- Proof of plan review completion
- Building code
- Montana 2021 Edition International Building Code (IBC 2021), including International Residential Code (IRC 2021), International Existing Building Code (IEBC 2021), and related mechanical, plumbing, electrical, energy, and fuel gas codes (all effective June 11, 2022; adopted via Administrative Rules of Montana ARM Title 24, Chapter 301)
§ 03
Application process
Typical processing: Average 3 weeks for plan review
- 01 Access the EBIZ.MT.GOV online portal at https://ebiz.mt.gov/
- 02 Create account or log in (if existing user)
- 03 Complete Building Permit/Plan Review Application
- 04 Upload or attach construction plans showing compliance with Montana 2021 IBC
- 05 Submit application and plans via portal
- 06 State Building Codes Program reviews plans (average 3 weeks for review)
- 07 Applicant receives plan review comments and fee estimate via email/mail
- 08 Address all plan review comments in writing and submit revisions
- 09 Pay required permit fees to State
- 10 Building permit is issued
- 11 Applicant notifies assigned state inspector when work is ready for inspection
- 12 Inspector performs required inspections at designated stages
- 13 Final inspection and certificate of issuance
Typical processing time: Average 3 weeks for plan review
§ 04
Required inspections
Scheduling and sequence
How to schedule
- Permit holder must notify the assigned state inspector when work is ready for inspection and provide reasonable access to the building site (phone)
Typical sequence: Typical inspection sequence: Foundation/footing, framing, rough-in systems (electrical, plumbing, mechanical, HVAC), insulation/fire-stopping, final inspection before certificate of occupancy
§ 05
Frequently asked
Common questions about unincorporated Carter County permits
01 Do I need a building permit in unincorporated Carter County, MT? ▸
Prior to start of construction for any building being built, remodeled, moved, or undergoing change of occupancy (except exempt categories)
02 How do I apply for a building permit in unincorporated Carter County, MT? ▸
To apply for a building permit in unincorporated Carter County, MT, follow these steps: 1. Access the EBIZ.MT.GOV online portal at https://ebiz.mt.gov/ 2. Create account or log in (if existing user) 3. Complete Building Permit/Plan Review Application 4. Upload or attach construction plans showing compliance with Montana 2021 IBC 5. Submit application and plans via portal 6. State Building Codes Program reviews plans (average 3 weeks for review) 7. Applicant receives plan review comments and fee estimate via email/mail 8. Address all plan review comments in writing and submit revisions 9. Pay required permit fees to State 10. Building permit is issued 11. Applicant notifies assigned state inspector when work is ready for inspection 12. Inspector performs required inspections at designated stages 13. Final inspection and certificate of issuance
03 How long does it take to get a building permit in unincorporated Carter County, MT? ▸
Building permit processing times in unincorporated Carter County, MT typically run Average 3 weeks for plan review. Timelines can vary based on project complexity and current department workload.
04 What work is exempt from building permits in unincorporated Carter County, MT? ▸
Not all construction work requires a permit in unincorporated Carter County, MT. The following work is generally exempt: Farm and ranch buildings; Mining buildings on mining property; Petroleum refineries and pulp/paper mills (except office and shop buildings); Residential buildings containing fewer than five dwelling units (excluding facilities serving transient guests); Private garages and private storage buildings for personal use only (not part of commercial enterprise); General finishing work such as painting and tiling. Note: Additional work may be exempt; inquiry to the bureau may be required to determine permit necessity When in doubt, confirm with the local building department before starting work.
05 How do I schedule a building inspection in unincorporated Carter County, MT? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Carter County, MT via: Permit holder must notify the assigned state inspector when work is ready for inspection and provide reasonable access to the building site.
last verified March 2026
source Montana Building Codes Program (Building and Commercial Measurements Bureau), Montana Department of Labor and Industry, Business Standards Division ↗
entry id permits/montana/carter/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Montana Building Codes Program (Building and Commercial Measurements Bureau), Montana Department of Labor and Industry, Business Standards Division before applying. Jaspector is not legal advice.