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Assessor [Archived 05-11-2022] - Sales

Published by datacatalog.cookcountyil.gov | Cook County of Illinois | Catalog Last Checked: July 07, 2026 at 09:09 PM | Dataset Last Updated: January 27, 2026
Real estate sales data used by the Cook County Assessor to estimate Fair Cash Values for the purpose of property taxation. Deeds that include multiple PIN numbers are excluded from this data. This data is produced by joining sales data from the Illinois Department of Revenue against incomplete sales data from the Cook County Recorder of Deeds, parsing the resulting data to obtain data unique by deed number, and, in some cases, determining arms' length status of sales.

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