Welcome

Welcome to the Cook County Assessor's Office Website. Please select from the drop-down menu selections at the top of the page to access the information you need. The Assessor's Office maintains this website as a free public service to provide extensive assessment information to Cook County taxpayers.

Assessment Data Online

Online search and retrieval of parcel data with G.I.S. pictures of residential and nonresidential properties as well as prior and current assessment values. This information is similar to what is found on your "Notice of Proposed Assessed Valuation," mailed by the Assessor’s Office.
New Update to our Website
Direct Access to the Assessor’s Office Data for Businesses

The Assessor’s Office has recently received authorization from the Cook County Board of Commissioners to provide businesses with unlimited direct access to the most current assessment data in Cook County. Interested ?   Contact Us
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 millions of hits per month on our website.  Interested ?   Contact Us

Interactive Mapping

This application allows you to interact with property information maintained by the Cook County Assessor's Office.
Here you can view property details such as:

Parcel Locations and Square Footage
Assessed Value and Property Characteristics
Classification Descriptions
Using the built-in map viewer and database query tools, you can:
 Compare your property to others in your neighborhood
View street-level property photos
View aerial photographs and parcel boundaries
For a quick tour of this new system, click here for a Quick Start.
 
7% Expanded Homeowner Exemption

In 2003, Cook County Assessor Jim Houlihan developed the 7% Expanded Homeowner Exemption in an effort to provide immediate relief to homeowners facing skyrocketing assessment increases and the resulting increases in their property tax bills.  The measure was recently renewed by the Illinois General Assembly. To view how the 7% Expanded Homeowner Exemption affects your home, click here or use our quick search below:

Enter Permanent Index Number
- - - -  
To view the impact effect in your community Click Here .
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In The News

The Cook County Assessor’s Office has refined its appeal search functions and new search features are now available.  Taxpayers may retrieve information based on property index number, appeal number, tax representative, attorney and also retrieve the result or status of an appeal. To obtain information on a specific property please click here.

Chicago – February 29, 2008 – Cook County Assessor Jim Houlihan Announces Property Tax Relief Available for Senior Citizens.
  - Senior Freeze Exemption Applications Mailed to 145,000 Senior Citizens
- Senior Citizen Exemption Renewal Automatic This Year
Read Press Release

The Cook County Assessor’s Office has refined its appeal search functions and new search features are now available.  Taxpayers may retrieve information based on property index number, appeal number, tax representative, attorney and also retrieve the result or status of an appeal. To obtain information on a specific property please click here.

Chicago – November 6, 2007 – Cook County Assessor James M. Houlihan released a report today showing an aggregate estimate and methodology used to determine the potential value of Cook County’s non-profit hospitals. View Details

In an effort to generate revenue, the Cook County Board recently approved a new fee plan requiring the Cook County Assessor’s Office begin charging fees for a number of services.  View Press Release

Active Townships

No current township activity, to view all township details click here.
Upcoming Out-Reach Events
Illinois Dept. of Human Services   1151 S. Woods    May 13, 2008   View Details
Safety Officers Expo   3510 S. Michigan    May 14, 2008   View Details
View Full Listing Click Here
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Cook County Assessor's Office (Main)  County Building, Third Floor
118 North Clark Street, Chicago, IL 60602  (312) 443-7550

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