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§ 02
When a permit is required
Permit triggers and exempt work for Montgomery County
no county building permit; structural improvement notification for assessment purposes when work is $1,000 or more.
Required documents
- owner name and address, improvement information, estimated start date, cost estimate, property number, legal description.
§ 03
Fee schedule
Montgomery County building permit fees
Fee type
Amount
01
Permit fee formula
none for a county permit; this is not a fee-based permit
§ 04
Frequently asked
Common questions about unincorporated Montgomery County permits
01 Do I need a building permit in unincorporated Montgomery County, IL? ▸
no county building permit; structural improvement notification for assessment purposes when work is $1,000 or more.
02 How much does a building permit cost in unincorporated Montgomery County, IL? ▸
Building permit fees in unincorporated Montgomery County, IL are set by the local building department and vary by project type and valuation. Fees are calculated as: none for a county permit; this is not a fee-based permit.
last verified April 2026
source Montgomery County Supervisor of Assessments ↗
entry id permits/illinois/montgomery/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Montgomery County Supervisor of Assessments before applying. Jaspector is not legal advice.