Cook county assessor chicago property taxes

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    Frequently Asked Questions

    On August 15th, President Joseph Biden signed a disaster declaration for the State of Illinois in areas affected by severe storms and flooding from June 29 to July 2, 2023, including all of Cook County. This triggered the provisions of 35 ILCS 200/13-5, which authorizes property tax relief for disaster areas.  A PTAX 245 Application requests reassessment of property under Section 13-5 of the Property Tax Code (35 ILCS 200/13-5) based on substantial damage caused by a disaster in a county that has been declared a major disaster area by the President of the United States or the Governor of the State of Illinois.

    As of September 1st, 28,000 Cook County taxpayers had claimed flooding damages under the declaration, and FEMA had identified $52 million in damages from this summer’s flooding. As a result of President Biden’s disaster declaration, property owners experiencing significant damage due to this summer’s flooding may be

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    The Cook County Property Tax System

    The Cook County property tax system is complex. It involves the Assessor's Office, the Board of Review, the Cook County Clerk, and the Cook County Treasurer. Plus, the Illinois Department of Revenue. How much you pay in taxes depends on your property's assessment, assessments of other properties, appeals, exemptions, and local tax levies. In this section, we explain all of it.

    The Role of the Cook County Assessor

    The Cook County Assessor is an elected government official who is responsible for establishing fair and accurate property assessments. Valuation of the county's 1.8 million parcels of property is conducted for ad valorem tax purposes. Ad valorem means according to value and refers to the amount of taxes that will be required to be paid based on the value of the property.

    To administer this task, the Assessor reassesses one-third of the properties located in the county each year. The Assessor alternates assessments among the northe

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    Mission

    The mission of the Cook County Assessor’s Office is to deliver accurate and tydlig assessments of all residential and commercial properties. We serve every community in the County through ethical stewardship within the property tax system. 

    Mandates and Key Activities

    • As part of the Valuation and Appeal Process, the County Assessor follows and enforces state and county laws and ordinances: Classification of Property 35 ILCS 200/9-150
      • Classification Ordinance Cook County Code of Ordinances, Chap. 74, Art. II, Div. 1, Sec.74-31 et seq. and Div. 2, Sec.74-60 et seq.
      • Assessment by Districts 35 ILCS 200/9-220 Omitted Property 35 ILCS 200/9-260, 9-270 Publication of Assessments 35 ILCS 200/12-20
      • Assessment Notices of Increases 35 ILCS 200/12-55 Certificates of Correction 35 ILCS 200/14-10 Certificates of Error 35 ILCS 200/14-15
      • Revision of Assessments 35 ILCS 200/14-35
      • Valuation of Particular Types of Property 35 ILCS 200/10-5 thru 10-620
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