Will County Supervisor of Assessments
2023 Equalization Factors

  PIN Starts with: Township: Factor: Property Class Applied To:  
  07-01 Wheatland 1.0571 Residential Only  
  12-02 DuPage 1.1092 Residential Only  
  06-03 Plainfield 1.0122 Residential Only  
  11-04 Lockport 1.0202 Residential Only  
  16-05 Homer 1.0710 Residential Only  
  05-06 Troy 1.0578  and  1.0200 1.0578 on Residential
1.0200 on Commercial & Industrial
  30-07 Joliet 1.1055 Residential Only  
  15-08 New Lenox 1.0855 Residential Only  
  19-09 Frankfort 1.0979 Residential Only


  04-10 Channahon 1.0663 Residential Only  
  10-11 Jackson 1.0073 Residential Only  
  14-12 Manhattan 1.0000 All  
  18-13 Green Garden 1.1042 Residential Only  
  21-14 Monee 1.1368 All  
  23-15  or  23-16 Crete 1.1252 Residential Only  
  03-17 Wilmington 1.1043 Residential Only  
  09-18 Florence 1.0720 Residential Only  
  13-19 Wilton 1.0722 Residential Only  
  17-20 Peotone 1.1085 Residential Only  
  20-21 Will 1.0897 Residential Only


  22-22  or  22-23 Washington 1.0904 Residential Only  
  02-24  or  02-25 Reed 1.1020 Residential Only  
  01-24  or  01-25 Custer 1.0538 Residential Only  
  08-24  or  08-25 Wesley 1.0910 Residential Only  

Prior Years Equalization Factors: 2022 Equalization Factors 2021 Equalization Factors 2020 Equalization Factors

Equalization is the application of a uniform percentage increase or decrease to assessed values of various areas or classes of property in order to bring assessment levels, on average, to the same percentage of market value. Equalization of assessed values is important (and performed) at each level of government - township, county and state. Chief County Assessment Officers (CCAO), County Boards of Review and the State possess certain powers to equalize assessments.

In Will County, on an annual basis the Chief County Assessment Officer determines the level of assessment in each township based upon the sales transactions that have occurred in the three years prior to the assessment date. This year’s assessment valuation data is January 1, 2023. In analyzing the sales from the three previous years (2020, 2021, 2022) the CCAO takes the median level of assessment for each of those years, averages those medians, to determine the adjustment in assessments required in a township. Once the assessor has completed their assessment roll for the year, the CCAO analyzes the changes in assessments by class (residential, commercial and industrial) and determines what further adjustments are needed in a township, by applying a township multiplier to all non-farm parcels in the jurisdiction.

The equalization process is intended to bring the three-year average of the median assessment levels in a township to 33.33% of market value, which is our statutory requirement in Illinois.

PUB-136 - Property Assessment and Equalization information provided by the Illinois Department of Revenue.