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§ 02
When a permit is required
Permit triggers and exempt work for Franklin County
Building permits are required for residential and commercial construction in unincorporated Franklin County.
Required documents
- Completed building permit application
- Construction plans (site plans, elevations, structural details)
- Proof of septic permit approval from Southeast Idaho Public Health District
- Any required engineering or design documentation
- Building code
- Idaho Building Code (2018 IBC) and Idaho Residential Code (2018 IRC) with state amendments.
- Contractor requirements
- Contractors performing work on projects of $2,000 or more in value must be registered with the Idaho Contractors Board. Proof of workers' compensation and general liability insurance ($300,000+ single limit) required.
§ 03
Application process
Typical processing: Minimum 30 days from complete application submission
- 01 Obtain septic permit from Southeast Idaho Public Health District before proceeding.
- 02 Submit completed building permit application with required documentation to Franklin County Building Inspector.
- 03 County reviews application for completeness and compliance with Idaho Building Code (2018 IBC) and Idaho Residential Code (2018 IRC).
- 04 Pay required permit fees upon approval.
- 05 Receive permit issuance and commence construction.
Typical processing time: Minimum 30 days from complete application submission
§ 04
Required inspections
Scheduling and sequence
How to schedule
- (208) 220-2120 (phone)
§ 05
Frequently asked
Common questions about unincorporated Franklin County permits
01 Do I need a building permit in unincorporated Franklin County, ID? ▸
Building permits are required for residential and commercial construction in unincorporated Franklin County.
02 How do I apply for a building permit in unincorporated Franklin County, ID? ▸
To apply for a building permit in unincorporated Franklin County, ID, follow these steps: 1. Obtain septic permit from Southeast Idaho Public Health District before proceeding. 2. Submit completed building permit application with required documentation to Franklin County Building Inspector. 3. County reviews application for completeness and compliance with Idaho Building Code (2018 IBC) and Idaho Residential Code (2018 IRC). 4. Pay required permit fees upon approval. 5. Receive permit issuance and commence construction.
03 How long does it take to get a building permit in unincorporated Franklin County, ID? ▸
Building permit processing times in unincorporated Franklin County, ID typically run Minimum 30 days from complete application submission. Timelines can vary based on project complexity and current department workload.
04 How do I schedule a building inspection in unincorporated Franklin County, ID? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Franklin County, ID via: (208) 220-2120.
last verified April 2026
entry id permits/idaho/franklin/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Franklin County Building Inspector before applying. Jaspector is not legal advice.