Three common grounds for appeals are listed below:

1. Uniformity Appeal:

   If you are concerned that the assessed valuation of your home is not uniform with the assessed valuations of other similar homes, compare your property to similar homes. This comparison will help you determine if you have reason to file a uniformity appeal.

   There are two ways to do this:

   1. Simply fill out the appeal form, indicating that the purpose of the appeal is "lack of uniformity". You do not need to research and find your own comparable properties in order to file an appeal with our office. Our analysts will check properties comparable to yours to determine if your assessed value is in line with the assessed values of those properties.

   2. If you wish to include a list of comparable properties with your appeal, please follow the gudielines below:

      • For your convenience, all residential assessments will be published in a local community newspaper a few days after you receive your reassessment notice. The name of the newspaper and date of publication are indicated on your notice. The assessment listing will also be available at your local library.
      • When choosing comparable properties, select homes within your neighborhood code that closely resemble your own home in both size and style. If the Permanent Index Numbers (PINs) are not known, the Assessor's staff will assist you in obtaining this information. You may also use the residential data books located in all of our offices to check if the comparable assessed values are in line with your assessment. If the assessed value of the comparable properties that you have chosen are lower than your property's assessed value, you may have reason to file an appeal.
      • You may also find the assessed values of comparable properties by visiting the assessor's Web site property search. Pictures of nearly every Cook County property may also be found there.
      • Write the PINs that you have found to be comparable on the appeal form that you file. Our analysts will use your information, along with our office data, to determine if the assessed value of your home is in line with the assessed values of comparable properties.

2. Overvaluation Appeal:

   You may also wish to file an appeal if you believe our estimate of the property value is overvalued for any reason. You are encouraged to submit supporting documentation, such as recent closing statements or purchase prices of homes similar to yours, along with your appeal.

3. Property Description Error Appeal:

   Finally, if there is an error in the description of your property, such as incorrect square footage of living area or an error that you believe may affect property value, you may wish to file an appeal. However, a minor error does not necessarily indicate an incorrect assessment.