Fairness, Ethics, Transparency.
Many exemptions, appeals, and supporting documents can now be filed online with the Cook County Assessor's Office.
To assist taxpayers and our staff in these extraordinary times, deadlines for all online exemption applications have been extended.
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.