MissionThe mission of the Cook County Assessor’s Office is to deliver accurate and transparent assessments of all residential and commercial properties. We serve every community in the County …

Click here to access our advanced search tool, where you can locate your property by address, PIN, or neighborhood.

The Cook County Assessor's Office, situated in Chicago, Illinois, is responsible for delivering accurate and transparent assessments of all residential and commercial properties within Cook County.

Whether you are buying, selling, refinancing, or managing a legal matter, our Chicago real estate appraisal services are tailored to your needs with accuracy, efficiency, and professionalism.

In Cook County, property taxes involve coordination between offices at the county and state level. The CCAO produces fair market values for properties.

Important: This site provides access to the Cook County Assessor’s Office property records database. To access the records, you can search by your Property Index Number (PIN) or by Address.

Cook County Treasurer's Office - Chicago, IllinoisThe Cook County Treasurer's Office website was designed to meet the Illinois Information Technology Accessibility Act and the Americans with …

For appointments or assistance, please book at a nearby branch. In areas outside the City of Chicago, assistance may be available at local township assessors' offices. Our office will be closed on the …