As of Monday, November 16th, the downtown and suburban offices of the Cook County Assessor's Office are closed to the public. 

Our phone lines remain open to the public during normal business hours and assistance is available via our website and social media channels.


Basic Information

The basics of the property tax system and what you need to know. 

How To File...

Appeal and exemption filing

These guides can assist you in filing for exemptions or appeals with our office.



Deadlines, property information requests, and valuation reports can be found here.