Fairness, Ethics, Transparency.
Please note that our offices are currently closed to the public. Here's how to access services and assistance.
Online tools
Many exemptions, appeals, and supporting documents can now be filed online with the Cook County Assessor's Office.
For Homeowners
The deadline to apply for property tax-saving exemptions has been extended to Friday, April 10.
For Business Owners
Learn about commercial property reassessments and find incentives and tools for business owners.
Where do I find my PIN?
Your 14-digit Property Index Number (PIN) is printed on your tax bill, your property closing documents and deed, and notices from the Assessor's office (such as your assessment notice).
Enter PIN to see property details
Don’t know the property’s PIN? Search by address.
Latest News
Assessor’s Office Suspends Assessment Notice Mailings and Deadlines
Exemption filings and processing continue online
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