Download Bulletin : Class 1 Property

Taxpayers requiring assistance with commercial/industrial appeals may consult one of the assessor’s industrial/commercial hearing specialists at 312-603-7526. They may also receive assistance at the assessor’s downtown office and at all suburban branch offices.

MAIN OFFICE OF THE COOK COUNTY ASSESSOR
(Located in Cook County Building)

The appellant will be notified by mail of the result of the appeal. If the appellant is dissatisfied with the result, reconsideration may be sought upon timely submission of a written request which details in brief and specific terms the basis for reconsideration. All such requests for reconsideration should be addressed to the Chief of Assessment Operations.

A Certificate of Error request is initiated in all cases except exemption claims by filing a current assessment year appeal accompanied by a Certificate of Error application for each tax year requested. The request for a Certificate of Error should also be marked on the appeal form with the basis of the Certificate of Error noted in the explanation box. The same rules and recommendations for affidavits and supporting documentation on a current appeal apply for a Certificate of Error.

Any affidavit should provide the following:

The following documents may be required to initiate an appeal. Please refer to the respective Class Bulletin for more information.

1. Real Estate Valuation Appeal form

   This form must be completed in its entirety and shall contain:

The Office of the Assessor has a policy for certain properties (you will be told if your property falls under this category) in which a letter request for pre-valuation information and documentation is substituted for the initial reassessment notice. This program is an effort to have access to information generally unavailable to the Assessor so as to arrive at a more accurate and fair initial assessed valuation.

Notice appeals may be filed at any time within the filing period of 30 calendar days beginning with the date Notices of Proposed Assessed Valuation are issued for the township in which the subject property is located.

Owners of commercial properties and businesses may wish to consult with members of the Assessor's staff for assistance in preparing an appeal. Inquiries may be directed to an industrial/commercial specialist at 312-603-7526.

The Assessor's staff can assist in answering questions regarding filing an appeal. (312) 603-7526