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Direct Access to the Assessor’s Office Data for Businesses

The Assessor’s Office is working with the Cook County Board of Commissioners to provide businesses with unlimited direct access to the most current assessment data in Cook County.

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Advertising your Business on the Assessor's Office Website

The Assessor’s Office has recently received authorization from the Cook County Board of Commissioners to allow businesses to advertise on the Assessor’s Office Website. The Assessor’s Office currently receives an average of 33 million hits per month on our website.

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The most current assessment information will only be available for properties in triennial reassessment townships that   have been mailed their "Notice of Proposed Assessed Valuation." For a listing of available townships and mailing dates click here.

Please read the following instructions for information on how to best conduct an assessment search for non-residential property.

Search Help: If you are having difficulty finding a property or wish to expand your search, try entering less information. For instance, in the "Search by Address" function leave the direction box blank, or only enter the first few letters of the street or city. In the "Search by PIN" function, if you enter only the first seven numbers of your PIN (i.e…if your index number is 01-01-123-456-0000, and you only insert 01-01-123) this will expand your search to include all the properties that share those seven digits in ascending PIN order. This will widen the parameters for the database and improve the possibility that a record is found.

CookCountyAssessor.com

   
   
Cook County Assessor's Office (Main)  County Building, Third Floor
118 North Clark Street, Chicago, IL 60602  (312) 443-7550

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