Assessor

Phone Number

Mission

The 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 through ethical stewardship within the property tax system. 

Mandates and Key Activities

  • As part of the Valuation and Appeal Process, the County Assessor follows and enforces state and county laws and ordinances: Classification of Property 35 ILCS 200/9-150
    • Classification Ordinance Cook County Code of Ordinances, Chap. 74, Art. II, Div. 1, Sec.74-31 et seq. and Div. 2, Sec.74-60 et seq.
    • Assessment by Districts 35 ILCS 200/9-220 Omitted Property 35 ILCS 200/9-260, 9-270 Publication of Assessments 35 ILCS 200/12-20
    • Assessment Notices of Increases 35 ILCS 200/12-55 Certificates of Correction 35 ILCS 200/14-10 Certificates of Error 35 ILCS 200/14-15
    • Revision of Assessments 35 ILCS 200/14-35
    • Valuation of Particular Types of Property 35 ILCS 200/10-5 thru 10-620
  • The County Assessor provides taxpayer assistance via the review, processing, and administration of Exemptions through the following ordinances and laws: Disabled Veterans 35 ILCS 200/15-165
    • Returning Veterans Homestead 35 ILCS 200/15-167 Disabled Persons Homestead 35 ILCS 200/15-168
    • Disabled Veterans Standard Homestead 35 ILCS 200/15-169 Senior Citizens Homestead 35 ILCS 200/15-170
    • Senior Citizens Assessment Freeze 35 ILCS 200/15-172 General Homestead 35 ILCS 200/15-175
    • Alternate General Homestead 35 ILCS 200/15-176 Long-time Occupant Homestead 35 ILCS 200/15-177 (This role includes significant outreach, communications, and religious exemption programs as well as responding to thousands of taxpayer inquiries and certificates of error.)
  • The County Assessor enforces the Erroneous Exemptions legislation (35 ILCS 200/9-275), designed to target property owners who erroneously received property tax exemptions.

Downtown Office 
Schedule an appointment

118 N. Clark Street, Room 320 
Chicago, IL 60602 
312-443-7550 
8:30 a.m. - 5:00 p.m.

Markham Branch Office 
Schedule an Appointment

16501 S. Kedzie Ave. 
Room #237 
Markham, IL 60426 
312-443-7550 
8:30 a.m. - 4:30 p.m.

Skokie Branch Office 
Schedule an Appointment

5600 W. Old Orchard Rd., Room #149 
Skokie, IL 60077 
312-443-7550 
8:30 a.m. - 4:30 p.m.

Bridgeview Branch Office 
Schedule an Appointment

10200 South 76th Avenue, Room #237 
Bridgeview, IL 60455 
312-443-7550 
8:30 a.m. - 4:30 p.m.

In areas outside the City of Chicago, assistance may be available at local township assessors' offices.

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Location Title
Main office
Location Phone
Location Hours
Sunday: Closed
Monday: 8:30 am-5:00 pm
Tuesday: 8:30 am-5:00 pm
Wednesday: 8:30 am-5:00 pm
Thursday: 8:30 am-5:00 pm
Friday: 8:30 am-5:00 pm
Saturday: Closed