Properties in Cook County are reassessed every three years, and 2018 is one of those years.

Once assessment notices for your township are mailed you have 30 days to file an appeal.

There is no cost to file an appeal.

Plus when you appeal there is no chance an assessment will be increased so it's worth trying!


Jefferson August 16th.

Proviso August 17th.

Wheeling  August 17th.

Orland August 20th.

Lake  August 30th. 

See the entire Township deadline list here



This is the easiest way but they charge a portion of your savings of the first year.  I have seen anywhere between 30-50%.  (but if you are doing it in a reassessment year you get 3 years of benefits so its really more like keeping 83% of savings if they charge 50% of year one)

Here are a few recommendations is a web-based application which facilitates residential property tax appeals in Cook County, developed by seasoned Cook County property tax attorneys. The entire appeal process is managed by

Anastasia Poulopoulos
Anastasia M. Poulopoulos, Ltd.
(312) 545-9252

Dimitri Trivizas
Dimitrios P. Trivizas, Ltd.
(312) 256-7333

Molly Phelan
Much Shelist, P.C.
Office: 312.521.2679


If you are going to go the DIY route, make sure you make the deadlines they are very narrow windows.  Plus make sure that you have good evidence and present it clearly.  

1. Keep track of the deadlines for appeals from your township, both for the Cook County Assessor and Board of Review.

2.  Most likely you will be using the lack of uniformity argument to lower your assessed value. When you go to file online a list will come up with what they think are comparable properties and you can check them off. Make sure the comparable homes you use are similar in square footage, lot size, location, construction type and bedroom and bathroom count.  If you find that the assessor has valued your home higher than what these homes are assessed at you can make a strong argument for reducing your assessment.

5. File your appeal online with the Cook County Assessor’s Office, including your analysis of comparable properties. Wait a few months to learn the results.

6. If your appeal is declined or if you think your reduction should be larger you can now appeal to the Board of Review. If similar homes near you appealed at the Assessor and won, you now have more data to argue your case.