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§ 02
When a permit is required
Permit triggers and exempt work for Cassia County
A building permit is required for construction, erection, relocation, or remodeling of buildings covered under the International Building Code as adopted by Cassia County.
Accessory structures of 200 square feet or less (no permit required, but may be subject to zoning standards)
Agricultural structures for farm implements, hay, grain, poultry, livestock, or horticultural products may qualify for Agricultural Siting Permits rather than standard building permits
- Exempt Accessory structures of 200 square feet or less (no permit required, but may be subject to zoning standards)
- Exempt Agricultural structures for farm implements, hay, grain, poultry, livestock, or horticultural products may qualify for Agricultural Siting Permits rather than standard building permits
Note: Exempt from building permit does not mean exempt from zoning and planning requirements. Verify all exemptions with the County Building Department before proceeding.
Required documents
- Completed building permit application
- Plans and blueprints
- Property owner information
- Contractor information (if applicable)
- Building code
- International Building Code (IBC) with Idaho amendments; Idaho Residential Code (2020 Edition, based on IRC 2018); Idaho Energy Conservation Code (2020); International Fire Code (2018)
- Permit validity
- Not specified; contact county for details.
- Owner-builder
- Owner-builders may perform work on their own property; contractor registration may apply for projects valued at $2,000 or more.
- Contractor requirements
- Contractors performing work valued at $2,000 or more must register with Idaho Contractors Board and provide proof of workers compensation insurance and general liability coverage ($300,000 minimum).
§ 03
Application process
Typical processing: Varies by project complexity; contact county for specific timelines.
- 01 Submit plans and blueprints to the Cassia County Building and Zoning Department.
- 02 Pay non-refundable plan review fee with application (fee is applied to total permit fee).
- 03 County Building Official reviews plans for compliance with adopted codes.
- 04 Obtain approval from County Building Official before construction commences.
- 05 Keep approved plans on-site during all construction activities.
- 06 Schedule required inspections at appropriate construction phases.
Typical processing time: Varies by project complexity; contact county for specific timelines.
§ 04
Required inspections
Scheduling and sequence
How to schedule
- 208-878-7302 (phone)
- County Building Department, 1459 Overland Ave., Room 210 (in-person)
- Inspection hours
- 8:30 a.m. – 5:00 p.m., Monday – Friday
§ 05
Frequently asked
Common questions about unincorporated Cassia County permits
01 Do I need a building permit in unincorporated Cassia County, ID? ▸
A building permit is required for construction, erection, relocation, or remodeling of buildings covered under the International Building Code as adopted by Cassia County.
02 How do I apply for a building permit in unincorporated Cassia County, ID? ▸
To apply for a building permit in unincorporated Cassia County, ID, follow these steps: 1. Submit plans and blueprints to the Cassia County Building and Zoning Department. 2. Pay non-refundable plan review fee with application (fee is applied to total permit fee). 3. County Building Official reviews plans for compliance with adopted codes. 4. Obtain approval from County Building Official before construction commences. 5. Keep approved plans on-site during all construction activities. 6. Schedule required inspections at appropriate construction phases.
03 How long does it take to get a building permit in unincorporated Cassia County, ID? ▸
Building permit processing times in unincorporated Cassia County, ID typically run Varies by project complexity; contact county for specific timelines.. Timelines can vary based on project complexity and current department workload.
04 What work is exempt from building permits in unincorporated Cassia County, ID? ▸
Not all construction work requires a permit in unincorporated Cassia County, ID. The following work is generally exempt: Accessory structures of 200 square feet or less (no permit required, but may be subject to zoning standards); Agricultural structures for farm implements, hay, grain, poultry, livestock, or horticultural products may qualify for Agricultural Siting Permits rather than standard building permits. Note: Exempt from building permit does not mean exempt from zoning and planning requirements. Verify all exemptions with the County Building Department before proceeding. When in doubt, confirm with the local building department before starting work.
05 How do I schedule a building inspection in unincorporated Cassia County, ID? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Cassia County, ID via: 208-878-7302, County Building Department, 1459 Overland Ave., Room 210.
last verified April 2026
source Cassia County Zoning and Building Department ↗
entry id permits/idaho/cassia/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Cassia County Zoning and Building Department before applying. Jaspector is not legal advice.