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Understanding Property Taxes

Who's who in the Cook County property tax system? To learn the ins and outs of the taxation process, click here.

A Guide To Taxpayer Exemptions

To learn how taxpayer exemptions save you money, click here.

House Assessor

Senior Tax
Deferral Program 

Qualifying seniors can defer payment of their property taxes until their homes are sold.  To learn how, click here.

Assessor's Office

What We Do

 The Township Assessor provides a variety of services and acts as a liaison between the taxpayer and the Cook County Assessor’s Office.

Available Services

  • Assistance with appeals
  • Assistance with exemptions and refunds
  • Sales and building permit information
  • Taxpayer of record information
  • Detailed assessment information and property descriptions
  • Short legal descriptions of property
  • Property tax identification numbers
  • Assistance with name and address changes
  • Tax exempt property listings
  • Plat books
  • Tax rate information

 The Cook County Assessor's office does all assessing in Cook County. Property is reassessed every three years. 

 Tax billing is done by the Cook County Treasurer's office. Taxes are collected one year in arrears, and bills are issued twice each year, in the spring and  fall.

Latest News

Plan Your 2018 Real Estate Tax Calendar at New Trier Township
Jan Churchwell, Assessor of New Trier Township will lead a presentation on Wednesday, January 10, 2018, regarding the 2018 Cook County Real Estate Tax...
Read More
County Assessor’s Office Issues “CORRECTED” Notices for 389 Township Properties
The Cook County Assessor recently announced that he was re-setting the 2017 Assessed Value for 389 homes in New Trier Township and thereby...
Read More

Contact Information

Jan Churchwell Headshot

Assessor Jan Churchwell

Phone: 847-446-8200
Fax: 847-446-1743
Hours: Monday - Friday: 9:00 a.m. - 5:00 p.m.
Directions to our office.


Additional Resources

Cook County Assessor
(with links to downloadable forms) 
Chicago (312) 603-5300
Skokie (847) 470-7237

Cook County Treasurer
Chicago (312) 603-6202

Cook County Board of Review
Chicago (312) 603-5542
Skokie (847) 470-7520

Cook County Recorder of Deeds
Chicago (312) 603 5050

Cook County Clerk
Chicago (312) 603-5656 

Cook County Property Tax Portal



739 Elm Street, Winnetka, Illinois 60093 P. 847-446-8202 F. 847-446-1743
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