County Building Permits

Cook County Building Permit Guide (Unincorporated Area)

How to apply for a building permit in unincorporated Cook County, Illinois. Permit authority, application steps, fees, and inspection requirements.

Illinois Updated March 2026

Permit Authority

Unincorporated Cook County.

Department
Department of Building and Zoning (BNZ)
Address
69 W. Washington St., Suite 2830, Chicago, IL 60602
Phone
312-603-0500
Website
https://www.cookcountyil.gov/building-and-zoning

Online Permit Portal

Open

Platform: • Account required: No • Submission: In-person only

Application Process

Source: Department of Building and Zoning (BNZ)

General Requirements

Work That Does NOT Require a Permit

Contact the Department of Building and Zoning (BNZ) to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

Additional Resources

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Department of Building and Zoning (BNZ) before applying.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.
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