Jefferson Township Valuation Reports 2021

Reassessment notices for properties in Jefferson Township were mailed to property owners on August 16, 2021. Appeals may be filed until September 17, 2021.

For details on Jefferson's reassessments, real estate market data, and assessment methodology, read the full reports below.

The Cook County Assessor’s Office released initial assessments of residential and commercial properties in the township of Jefferson. This is the third of eight townships in the City of Chicago to be reassessed in 2021 and the third Chicago township to be reassessed under the leadership of Assessor Fritz Kaegi, who took office after Chicago’s last reassessment in 2018.

Increases in assessments reflect a robust market. Assessments, under Illinois law, should reflect overall market values. The first step to ensuring property owners pay only their fair share of property taxes—without needing to file appeals to correct inaccurate assessments—is to make sure assessments of all property types accurately reflect the real estate market.

Changes in assessed value in Jefferson Township

The following chart represents the increase in total assessed value in residential and commercial properties in Jefferson Township. The numbers below are prior to adjustments that may come after appeals.

Property Group 2018 (Board of Review Final) 2021 (pre-CCAO appeals, pre-Board of Review) Increase in total Assessed Value
Residential (Class 2) $4,178,423,824 $4,783,006,491 14%
All other classes $1,346,091,169 $2,442,444,574 81%
Total $5,524,514,993 $7,225,451,065 31%

Note: percentage increases and total increases for that category, not average property increases.

How assessments relate to property taxes

It is important to understand that an increase in a property's assessment does not lead to the same increase in an individual property’s tax bill. A property’s share of taxes depends on reassessments throughout all of Chicago, from homes in Chatham and Jefferson Park to commercial properties in Little Village and the Loop.

If the growth in assessed values elsewhere in Chicago outpaces the growth of an individual property’s assessment, that individual property’s share of property taxes could shrink despite its increase in property value. In 2018, properties in Jefferson Township made up 15% of Chicago’s total assessed value.

Property assessments in Chicago are used to apportion taxing district levies which pay for services such as schools, parks, libraries, and pensions. The Assessor does not set levies or tax rates. Also, increases in assessments do not necessarily increase the revenue received by taxing districts.

The graphs below show that in Jefferson Township, there were increases in both residential and non-residential total assessed value. These increases also shifted Jefferson's balance of residential and non-residential assessed value.

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At the end of the 2018 reassessment cycle, 76% of Jefferson Township’s total assessed value was residential, with the other 24% comprised non-residential and commercial multi-family properties.

The 2021 initial reassessed values have shifted this to 66% residential, and 34% non-residential and commercial multi-family properties. These percentages may change at the final stage of assessment after appeals are processed by the Assessor's Office and by the Board of Review.

2021 assessments will affect the second installment property tax bill issued in late 2022.

Residential modeling reports

Property type 2021 Model Report Property count 2020 Sales: # 2020 Sales: Range (bottom third, top third) 2021 Model: Estimated Market Range (bottom third, top third)
Single-family homes
Assessment Report 81,031 3,131 $310k to $400k  $300k to $380k
Multi-family (six units or less) 
Assessment Report 31,674 886 $370k to $490k $360k to $450k
Condos (class 2-99)
Assessment Report 23,000 1255 $150k to $230k $140k to $200k

Residential assessments are based on several factors, including location, age, neighborhood school boundaries, square footage, construction material, and the number of bedrooms and bathrooms.

The Estimated Market Values produced by the model are reviewed by our analysts, neighborhood by neighborhood. If warranted, our analysts refine the Estimated Market Values predicted by the model before the value is mailed to the homeowner. 

Commercial reports

Jefferson Township's commercial properties contain about:

  • 1,892 apartment buildings
  • 313 large office buildings
  • 1,000 industrial buildings
  • 274 retail shopping centers or other special commercial properties (classes 5-31 and 5-97)

View reports for each commercial property's valuation methodology by clicking the button below.

Commercial Valuations

In the three years since 2018's reassessment, commercial real estate sale prices and rents—therefore, estimated market values and assessed values—have grown overall from 2018 to 2021 for most property types.

In the last year, COVID-19 and associated shutdowns have had varying effects throughout Chicago. Hotels and retail properties are among the sectors with the largest declines since the onset of COVID, whereas large multifamily apartments, grocery stores, industrial buildings, and data centers have been stable or even met positive growth since the onset of COVID.

  • Market rents for apartments in Jefferson range from $638 to $1,800 a month. Market vacancy is between 3.8 and 7.90%.
    • Market values are estimated from $14,740 to $328,962 per unit.
    • Affordable housing figures are calculated separately and listed in the complete report below.
  • Office buildings in Jefferson range in size from 1,731 to 802,000 in square footage and are assessed at $5 - $28 in rent per square foot with 3-14% market vacancy.
    • Estimated market values are $51-$233 per square foot.

This commercial assessment report contains information about rents, expenses, and capitalization rates used by the Assessor's Office to determine assessments, including offices, hotels, industrial. and large multi-family apartments. For more on the Assessor's Office's commercial assessment methodology, read How Commercial Properties Are Valued.

UPDATED 8/28: A previous version of this report was missing cap rate and expense information for industrial properties. 

Commercial Assessment Report

How residential assessments are calculated

Residential assessments are based on several factors, including location, age, neighborhood school boundaries, square footage, construction material, and the number of bedrooms or bathrooms.

In order to detect the many different ways that homes’ physical characteristics and locations impact sale prices over time, we design a range of statistical, algorithmic models, which are then tested to see how well they compare to actual databases of sale prices. analysts examine estimated market values for different property classes, neighborhood by neighborhood, to verify that the model has performed effectively and that values fall in a reasonable range.

Improvements to data and modeling used by the Assessor’s Office since 2018 have improved assessment accuracy, uniformity, and equity—for neighborhoods, and for individual homes.

How commercial assessments are calculated

Our office first determines a property’s use (office, retail, apartments, industrial, etc.) and group the property with similar or like-kind property types. Then we examine the income generated by the property such as rent or incidental income streams like parking or advertising signage. Next, we examine market-level vacancy based on location and property type. In addition, new construction that has not yet been leased is also considered. Finally, we look at expenses such as property taxes, insurance, repair and maintenance costs, property management fees, and service expenditures for professional services. Once we’ve been able to recreate a snapshot of a property’s income statement based on market data, we use a standard valuation metric called a “capitalization rate” to convert income to value. 

More information on how assessments are calculated can be found at the How Properties Are Valued page.

Events for Jefferson Township homeowners

The Assessor's Office staff host virtual events to provide information and answer your questions about reassessments and appeals. See the full list.


If the property characteristics listed on your assessment notice are incorrect, or if the estimated market value of your home is significantly more than what you believe your home could sell for in the current real estate market, you should file an appeal. The last date to file an appeal is printed on your notice. A good rule of thumb is this: If the property characteristics on this notice are correct and the estimated market value is within 10 percent of what you think your home is worth then it is unlikely that an appeal would change your property’s assessed value enough to significantly affect its property tax bill.

If you would like to file an appeal of your property's assessment, we encourage you to file online. The appeal deadline for Jefferson Township is September 18, 2021.

For assistance with appeals, contact the CCAO's main office via phone, email, or social media. In-person visits are currently available by appointment.