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1. What building code has Jefferson County adopted?

Jefferson County adopted the 2018 International Building Code and International Residential Code on March 7, 2022.  See Ordinance 2022-02 (PDF) adopting the 2018 Building Codes.

Learn more about the 2018 International Building Code.

Learn more about the 2018 International Residential Code.

2. Which structures require permits?

View our document about Structures Needing Permits (PDF).

3. What is the process from plan submittal to certificate of occupancy?

View our document about the Building Permit Process (PDF).

4. How do I know what is required for the permit?

Please review the following regarding what's needed for your specific permit:

• Building Permit Checklist - Commercial (PDF)
• Building Permit Checklist - Residential (PDF)
• State Electrical, HVAC, and Plumbing Permit (requires the creation of an account with Idaho Department of Building Safety)
• Residential Cross Section (PDF)
• Garages and Accessory Building Cross Section (PDF)
• Pole Barn Cross Section (PDF)

5. What should I expect at each inspection?

View our document about Inspection Information and Checklists (PDF).

6. What is an agricultural exemption?

For the answer to this question, please view our Agriculture Exemption Packet (PDF).

If you have additional questions, please call 208-745-9220.