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When a permit is required
Permit triggers and exempt work for Iroquois County
For any grading of site for the construction, improvement, enlargement or alteration of new or existing building or structures, whether or not the alteration affects external dimensions
Note: No comprehensive published county exemption list was found in the public sources reviewed; exemptions should be verified with Planning & Zoning.
- completed application
- set of plans
- fee
- plot plan sketch
- legal description / PIN
- 911 address
- contractor information
- floodplain status
- project details
- Building code
- International Building Code, National Electrical Code, and State Plumbing Code; statewide Illinois minimum standards also apply.
- Owner-builder
- Owner or authorized agent signature requested on county form.
- Contractor requirements
- County form requests general, electrical, plumbing, concrete, and sewer contractor information.
Application process
Application → plan check → issuance → inspection → final
- 01 Start by completing the county building permit application and plot plan.
- 02 Submit completed application with plans and fee to Planning & Zoning.
- 03 County form states the permit will not be issued unless the total application is complete and plans are submitted.
- 04 Do not start construction until the permit is issued.
Fee schedule
Iroquois County building permit fees
Required inspections
Scheduling and sequence
- Inspection hours
- Monday through Friday, 8:30 AM to 4:30 PM
Typical sequence: application, plan submission, permit issuance, then construction
Frequently asked
Common questions about unincorporated Iroquois County permits
01 Do I need a building permit in unincorporated Iroquois County, IL? ▸
02 How do I apply for a building permit in unincorporated Iroquois County, IL? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with Iroquois County Planning & Zoning before applying. Jaspector is not legal advice.