County Building Permits
Jefferson County, ID - 2026 Building Permit Guide
How to apply for a building permit in unincorporated Jefferson County, Idaho. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
All unincorporated areas of Jefferson County, Idaho.
- Department
- Jefferson County Planning, Zoning & Building Department
- Address
- 210 Courthouse Way Suite 170, Rigby, ID 83442
Online Permit Portal
Platform: • Account required: No • Submission: In-person only
Additional resources:
Application Process
- Contact the Planning, Zoning & Building Department to determine permit requirements and applicable zoning district.
- Prepare complete building plans, site plan, and zoning compliance documentation.
- Submit application with all required documents to the Planning Department.
- Department reviews application for completeness and zoning compliance.
- Plan review period: approximately 15 business days minimum.
- Respond to any comments or requests for additional information.
- Receive permit upon approval and pay applicable fees.
Typical processing time: 15 business days minimum for plan review, may vary based on project complexity.
Source: Jefferson County Planning, Zoning & Building Department
General Requirements
Building permits are required for most new construction and major alterations in unincorporated Jefferson County.
Required Documents
- Complete building plans or floor plans
- Site plan
- Zoning compliance documentation
- Idaho Contractor License (if contractor-performed)
- Septic permit (if applicable)
- Building code
- 2018 International Building Code (IBC) and 2018 International Residential Code (IRC) as adopted by Idaho, with local amendments per Jefferson County Code Chapter 112.
- Contractor requirements
- Idaho Contractors Registration Act requires registration for jobs exceeding $2,000 (materials + labor combined).
Work That Does NOT Require a Permit
Contact the Jefferson County Planning, Zoning & Building Department to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
Additional Resources
- Building code: 2018 International Building Code (IBC) and 2018 International Residential Code (IRC) as adopted by Idaho, with local amendments per Jefferson County Code Chapter 112.
- Zoning information: View zoning info
- Eastern Idaho Public Health District - Septic Permits
- Idaho Division of Occupational and Professional Licenses (DOPL)
- License lookup guide: Idaho Contractor License Requirements
- Contract template: Idaho Homeowner-Contractor Agreement
- Idaho hub: Idaho Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Jefferson County Planning, Zoning & Building Department before applying.
Frequently Asked Questions
Jefferson County Building Permit FAQ
- Do I need a building permit in unincorporated Jefferson County, ID?
- Building permits are required for most new construction and major alterations in unincorporated Jefferson County.
- How do I apply for a building permit in unincorporated Jefferson County, ID?
- 1. Contact the Planning, Zoning & Building Department to determine permit requirements and applicable zoning district. 2. Prepare complete building plans, site plan, and zoning compliance documentation. 3. Submit application with all required documents to the Planning Department. 4. Department reviews application for completeness and zoning compliance. 5. Plan review period: approximately 15 business days minimum. 6. Respond to any comments or requests for additional information. 7. Receive permit upon approval and pay applicable fees.
- How long does it take to get a building permit in unincorporated Jefferson County, ID?
- Typical processing time is 15 business days minimum for plan review, may vary based on project complexity..
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