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  1. Certificates of Error | Cook County Assessor's Office

    Homeowners can now apply for multiple exemptions and tax years using one consolidated form. Please carefully read through the eligibility and required document section of each exemption.

  2. We are Here to Help | Cook County Assessor's Office

    Effective Monday, September 22, 2025, the Cook County Assessor’s Office located inside the Markham Courthouse will be closed for remodeling until further notice.

  3. Assessor's Office Locations | Cook County Assessor's Office

    Effective Monday, September 22, 2025, the Cook County Assessor’s Office located inside the Markham Courthouse will be closed for remodeling until further notice.

  4. About the Cook County Assessor's Office

    The Cook County Treasurer sends property tax bills, collects property tax revenue, and distributes it to taxing districts to fund services (like schools). Read how a residential property tax bill is …

  5. Homeowner Exemption | Cook County Assessor's Office

    Once the exemption is applied, the Assessor’s Office automatically renews it each year. A Homeowner Exemption provides property tax savings by reducing the equalized assessed value.

  6. What is a Homeowner Exemption and how can I receive it? | Cook …

    For further assistance, call our Taxpayer Services Department at (312) 443-7550. If you have never received a Homeowner Exemption on your home, you will need to apply for one. …

  7. Contact Us | Cook County Assessor's Office

    Search for refunds and learn more about the Treasurer's "Black & Latino Houses Matter" program by calling the Treasurer's Office at (312) 603-5100 or visiting cookcountytreasurer.com. …

  8. Property Tax Saving Exemptions | Cook County Assessor's Office

    Mar 18, 2025 · Join us for a virtual workshop to learn about the Cook County Assessor's Office and homeowner exemptions.

  9. Property Tax Exemption Deadline Extended | Cook County …

    Homeowners can either complete the paper application (s) or apply online on the Assessor’s website. If a Homeowner already successfully applied online for the exemption before …

  10. New Construction Reporting Form | Cook County Assessor's Office

    The Form may be submitted in person or by mail or electronic submission to the Cook County Assessor’s Office, 118 N. Clark St., Room 300, Chicago IL 60602.