Cook County · Illinois
Jefferson Township property tax appeals
A Jefferson Township property tax appeal starts with the Cook County Assessor's Office, then the Cook County Board of Review. The next deadline is Nov 12, 2026 for Jefferson Township, Cook County Assessor's Office.
- Next deadline
- Nov 12, 2026
- Open now
- Jefferson Township · Cook County Assessor's Office
Opens Sep 29, 2026Closes Nov 12, 2026
- Source: Assessment & Appeal Calendar (page last updated 9/24/26) - Cook County Assessor's OfficeLast checked
Check a Jefferson Township home for free
Enter the address or parcel number from your notice. We compare the assessment with similar homes and show the numbers, whatever they are. You decide and file yourself.
Part of Cook CountyEvery appeal date in Cook County
Part of ChicagoEvery Chicago township's appeal dates
- Where to file first
- Cook County Assessor's Office
- Our coverage
- Free check available
- Independent guide — not affiliated with Jefferson, Cook County or any government agency.
When and where do I file a Jefferson Township property tax appeal?
Who hears a Jefferson Township appeal?
The stages in order. We are not affiliated with any of these offices.
Cook County Assessor's Office
Cook County Board of Review
Circuit Court of Cook County (tax objection)
Illinois Property Tax Appeal Board
Which Jefferson Township filing windows are coming up?
| Closes | Area | Who hears it | Status |
|---|---|---|---|
| Nov 12, 2026 | Jefferson Township | Cook County Assessor's Office | Open now |
When were past Jefferson Township deadlines?
| Tax year | Window | Office |
|---|---|---|
| 2025 | Closed October 3, 2025 | Jefferson · Cook County Assessor's Office |
| 2024 | Closed November 13, 2024 | Jefferson · Cook County Assessor's Office |
| 2021 | Closed September 17, 2021 | Jefferson · Cook County Assessor's Office |
When is the Jefferson appeal deadline?
Cook County Assessor's Office: Closes November 12, 2026.
- Deadline detailBoard of Review re-review
- Jefferson Township, tax year 2025: the Board of Review's decision date was Apr 13, 2026 and the re-review period closed Apr 15, 2026; the Assessor (CCAO) certification date was May 11, 2026.[1]
- Deadline detailNotice mailed
- Jefferson Township (2024 reassessment): Reassessment Notices were mailed Sep 30, 2024; appeals were due Nov 13, 2024.[2]
What do Jefferson Township property taxes and assessments look like?
Figures from public records and the Census, each with its source. They describe the county's homes as a group, not the value of any one home.
How Jefferson Township home assessments are spread
How Jefferson Township home assessments are spreadHistogram of 109,829 Jefferson Township home assessments; median $38,977, middle half $32,000 to $49,000.
Jefferson Township compared with other townships
- Wheeling$42,001
- Elk Grove$40,000
- Maine$40,000
- South Chicago$40,000
- Jefferson$38,977
- Niles$38,250
- Norwood Park$38,000
- Schaumburg$37,259
- Orland$35,000
Ranked 16 of 38; showing the 9 nearest in rank.
Median assessed value by township: highest North Chicago ($135,400), lowest Thornton ($12,000).
What happened to Jefferson Township appeals in tax year 2025
- Assessor13% lowered of 12,322
- Board of Review48% lowered of 23,864
Assessor: 13% of 12,322 appeals lowered (median cut 5.9%); Board of Review: 48% of 23,864 appeals lowered (median cut 6.1%)
Jefferson Township filing windows on a calendar
- Jefferson TownshipNov 12, 2026 · Cook County Assessor's Office · Open now
The dashed line marks today.
Jefferson Township: Nov 12, 2026
How often is property reassessed in Jefferson?
Jefferson Township is reassessed every three years with the City of Chicago; its scheduled reassessment years are 2024, 2027 and 2030.
- Reassessment cycle
- Jefferson Township is reassessed every three years with the City of Chicago; its scheduled reassessment years are 2024, 2027 and 2030.[3]
What do home values and property taxes look like in Jefferson?
Jefferson Township (2024 reassessment): total assessed value grew 24% at the Assessor's initial reassessment, before appeals (tax year 2024). Jefferson Township (2024 reassessment): the Assessor's median estimated market value for single-family homes was $366,000 (median 2023 sale price $393,000) (tax year 2024).
- Assessed value change
- Jefferson Township (2024 reassessment): total assessed value grew 24% at the Assessor's initial reassessment, before appeals.[4]
- Median assessor estimate
- Jefferson Township (2024 reassessment): the Assessor's median estimated market value for single-family homes was $366,000 (median 2023 sale price $393,000).[2]
- Median condo price
- Jefferson Township (2024 reassessment): condos had a median 2023 sale price of $205,000; the Assessor's median estimate was $201,000.[2]
- Median sale price
- Jefferson Township (2024 reassessment): the median sale price of single-family homes in 2023 was $393,000; the Assessor's median market value estimate for the class was $366,000.[4]
- Median small apartment price
- Jefferson Township (2024 reassessment): small apartment buildings had a median 2023 sale price of $516,000; the Assessor's median estimate was $482,000.[2]
- Sales ratio standards
- Jefferson Township (2024 reassessment): the Assessor's sales ratio analysis of single-family homes met 3 of 3 IAAO standards.[2]
Other places nearby
- Hyde Park TownshipFree check available
- Lake TownshipFree check available
- Lake View TownshipFree check available
- North Chicago TownshipFree check available
- Rogers Park TownshipFree check available
- South Chicago TownshipFree check available
Where do these facts come from?
- [1]Board of Review 2025 Re-Review/Decision Dates (PDF, Rev.6/9/2026) - Cook County Board of ReviewOfficial notice, form, calendar or rules · last checked Oct 1, 2026
- [2]Jefferson: Residential Valuations - Cook County Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
- [3]Township Triennial Reassessment Schedule (PDF) - Cook County Board of ReviewOfficial notice, form, calendar or rules · last checked Oct 1, 2026
- [4]Property Values for Jefferson Township Released - Cook County Assessor's Office (press release, October 2, 2024)Official guide or FAQ · last checked Oct 1, 2026
- [5]Assessment & Appeal Calendar (page last updated 9/24/26) - Cook County Assessor's OfficeOfficial notice, form, calendar or rules · last checked Oct 1, 2026
- [6]35 ILCS 200/12-55 - Illinois Property Tax Code (ILGA; Wayback capture 2026-01-09)Statute or regulation · last checked Sep 24, 2026
- [7]2025 Assessment Calendar (PDF) - Cook County Assessor's Office (Wayback Machine capture 2026-05-11)Official notice, form, calendar or rules · last checked Sep 24, 2026
- [8]Property reassessments released for Jefferson Township - Cook County Assessor's Office (press release, August 20, 2021)Official guide or FAQ · last checked Oct 1, 2026
- 9.County open data: cook assessmentsRetrieved Sep 25, 2026; aggregated by us for the charts above.
- 10.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
- 11.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
- 12.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
- 13.County open data: appeal resultsAggregated by us for the appeal-results chart.
- 14.County open data: appeal resultsAggregated by us for the appeal-results chart.
Not affiliated with Jefferson Township or any government agency. Not legal advice. Not an appraisal.