Fairness, Ethics, Transparency.

Please note that our offices are currently closed to the public, and deadlines have been suspended. Here's how to access services and assistance

Online tools

Cook County

Many exemptions, appeals, and supporting documents can now be filed online with the Cook County Assessor's Office.

For Homeowners

Homeowners

To assist taxpayers and our staff in these extraordinary times, deadlines for all online exemption applications have been extended.

For Business Owners

Business Owners

Learn about commercial property reassessments and find incentives and tools for business owners.

Latest News

Assessor’s Office Suspends Assessment Notice Mailings and Deadlines Exemption filings and processing continue online

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