Assessor's Office

2020 Real Estate Assessment Appeals


            Presently, the “window” to appeal your property’s 2020 assessed value with the Cook County Assessor will begin March 5 and end approximately 40 days later. Check carefully any notice you may  receive to make sure it states the Assessed Value that you expect for your property. Any reductions you received from appeals you made in 2019 will be in effect through 2021 (subject to further reductions from subsequent appeals).  You may file your appeal in writing using the Assessor’s form or online using the Assessor’s portal.  Both the printed form and the online portal  can be accessed on the Assessor’s website (

            If you would like assistance in  filing your appeal such as information about comparable properties or recent  sales, we can help you.  The New Trier Township Assessor’s office is located at 739 Elm Street, Winnetka.  Our office hours are 9:00 a.m. to 12:30 p.m.  and 1:30 p.m. to 5:00 p.m. The office phone number is 847-446-8200. My email is, and Deputy Assessor Len Shifflett’s email is



NewTrier Township Assessor

What We Do

In a Nutshell: Your New Trier Township Assessor's Office advocates for you with the Cook County Assessor's Office and the Cook County Board of Review. Additionally, we provide a broad range of services acting as a liaison for you with various County agencies.

Available Services

  • Assistance with preparing appeals for the Cook County Assessor, the Assessor's Re-Review and the Cook County Board of Review (and Re-Review)
    • We provide information about the various grounds for appeal
    • We file appeals for you at your request
  • Assistance with preparing appeals for the Property Tax Appeal Board (PTAB)
  • Assistance with filing exemptions
  • Assistance with the Cook County Treasurer's Office
    • Obtaining refunds where applicable
    • Updating name and address information
    • Providing documentation to correct second installment tax bills that are missing valid exemptions
  • Sales and building permit information
  • Taxpayer of record information
  • Brief legal descriptions of a specific property
  • Information from the Plat Books ("Sidwell Maps")
  • Information from tax exempt properties
  • Tax rate information

Outreach Events

We are also available to do outreach events for your organization. We have a presentation we call "Your Annual Tax Calendar at a Glance," but will gladly tailor a presentation for your organization.

Cook County

Understanding Property Taxes

Who's who in the Cook County property tax system? Learn the ins and outs of the taxation process (PDF).

Contact Us

You can reach the New Trier Assessor's office at 847-446-8200. Deputy Assessor Leonard Shifflett and I look forward to serving you.

- Jan Churchwell, New Trier Township Assessor

Additional Resources