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Cook County · Illinois

Chicago property tax appeal

A Chicago property tax appeal goes to Cook County, which assesses Chicago homes: first the Cook County Assessor, then the Cook County Board of Review. The city is split into 8 assessment townships, and each has its own 2026 dates. Filing is free at both stages.

Next deadline
Oct 8, 2026
5 days left
Hyde Park Township · Cook County Assessor's Office

Opens Aug 26, 2026Closes Oct 8, 2026

Source: Assessment & Appeal Calendar (page last updated 9/22/26) - Cook County Assessor's OfficeLast checked

Check a Chicago 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

Where to file
Assessor: online (SmartFile). Board of Review: online portal or in person.
Fee
None
Our coverage
Free check available
  • Independent guide — not affiliated with the City of Chicago, Cook County or any government agency.
Last updated
October 1, 2026
Sources last checked
October 3, 2026
Status
Verified guide

How we verify facts

When and where do I file a Chicago property tax appeal?

Who hears a Chicago appeal?

The stages in order. We are not affiliated with any of these offices.

  1. Cook County Assessor's Office

    Filing: appeal

    Official site

  2. Cook County Board of Review

    Filing: complaint

    Official site

  3. Circuit Court of Cook County (tax objection)

    Filing: objection

  4. Illinois Property Tax Appeal Board

    Filing: appeal

    Official site

Which Chicago filing windows are coming up?

Chicago filing windows
ClosesAreaWho hears itStatus
Oct 8, 2026Hyde Park TownshipCook County Assessor's Office · Official source · Last checked Sep 29, 20265 days left
Oct 29, 2026Lake TownshipCook County Assessor's Office · Official source · Last checked Sep 29, 2026Open now
Nov 12, 2026Jefferson TownshipCook County Assessor's Office · Official source · Last checked Oct 1, 2026Open now
Expected Nov 24, 2026 – Dec 30, 2026North Chicago TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Dec 2, 2026 – Jan 7, 2027South Chicago TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Apr 17, 2027 – Jul 19, 2027Rogers Park TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Jun 20, 2027 – Aug 23, 2027West Chicago TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Jul 13, 2027 – Dec 23, 2027Lake View TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Aug 11, 2027 – Sep 22, 2027Rogers Park TownshipCook County Board of Review · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Sep 8, 2027 – Oct 20, 2027Lake View TownshipCook County Board of Review · Official source · Last checked Oct 3, 2026Forecast, not an official date

When were past Chicago deadlines?

Past Chicago filing windows
Tax yearWindowOffice
2026Closed September 29, 2026Lake View · Cook County Board of Review
2026Closed September 1, 2026Rogers Park · Cook County Board of Review
2026Closed August 21, 2026West Chicago · Cook County Assessor's Office
2025Closed November 28, 2025South Chicago · Cook County Assessor's Office
2025Closed November 20, 2025North Chicago · Cook County Assessor's Office
2025Closed October 3, 2025Jefferson · Cook County Assessor's Office
2024Closed October 11, 2024Lake · Cook County Assessor's Office
2024Closed September 11, 2024Hyde Park · Cook County Assessor's Office

Which Chicago township am I in?

Your township is printed on your assessment notice. Chicago's 8 assessment townships are Hyde Park, Jefferson, Lake, Lake View, North Chicago, Rogers Park, South Chicago and West Chicago. The free check finds yours from your address.

2026 Chicago appeal dates by township

Assessor windows open when a township's notices are mailed. Dates the Assessor hasn't posted are shown as forecasts.

All Cook County appeal deadlines

How to appeal a Chicago property assessment

  1. Find your township's window on your notice or the Assessor's calendar.

  2. Compare your home with similar homes in your assessment neighborhood. If you use comparable homes at the Assessor, include at least 3 (5 recommended).

  3. File with the Assessor online by the closing date, with all evidence. Late appeals are not accepted.

  4. File with the Board of Review when it opens your township, whether or not you appealed to the Assessor.

Upcoming appeal deadlines in every county we track

What evidence counts in Chicago, and can the value go up?

Condos and buildings owned by an LLC

Companies, LLCs and condo associations must be represented by an attorney at the Board of Review. Owners may appear for property in their own name.

Can my Chicago assessment go up?

At the Board of Review, yes. It can raise an assessment after written notice and a chance to be heard.

What do Chicago 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.

Median home assessment by township

  1. North Chicago$135,400
  2. Lake View$89,642
  3. Rogers Park$46,001
  4. South Chicago$40,000
  5. Jefferson$38,977
  6. West Chicago$30,000
  7. Lake$19,861
  8. Hyde Park$13,701

Median assessed value by township: highest North Chicago ($135,400), lowest Hyde Park ($13,701).

Median assessed value of homes in the property classes our free check covers (202, 203, 204, 205, 206 and 8 more) for each township with at least 50 such homes, tax year 2025 values after the Board of Review.Source: Assessment records from the county's open data (tax year 2025 values after the Board of Review), retrieved Sep 25, 2026; our calculation.

What happened to Chicago appeals in tax year 2025

  1. Hyde Park · Assessor16% lowered of 2,188
  2. Jefferson · Assessor13% lowered of 12,322
  3. Lake · Assessor12% lowered of 3,770
  4. Lake View · Assessor19% lowered of 5,675
  5. North Chicago · Assessor22% lowered of 1,578
  6. Rogers Park · Assessor14% lowered of 1,171
  7. South Chicago · Assessor18% lowered of 1,822
  8. West Chicago · Assessor20% lowered of 6,281
  9. Hyde Park · Board of Review43% lowered of 5,401
  10. Jefferson · Board of Review48% lowered of 23,864
  11. Lake · Board of Review52% lowered of 14,427
  12. Lake View · Board of Review45% lowered of 8,901
  13. North Chicago · Board of Review32% lowered of 2,241
  14. Rogers Park · Board of Review44% lowered of 2,166
  15. South Chicago · Board of Review43% lowered of 3,421
  16. West Chicago · Board of Review47% lowered of 12,339

Hyde Park · Assessor: 16% of 2,188 appeals lowered (median cut 8.6%); Jefferson · Assessor: 13% of 12,322 appeals lowered (median cut 5.9%); Lake · Assessor: 12% of 3,770 appeals lowered (median cut 7.5%); Lake View · Assessor: 19% of 5,675 appeals lowered (median cut 4.4%); North Chicago · Assessor: 22% of 1,578 appeals lowered (median cut 6.6%); Rogers Park · Assessor: 14% of 1,171 appeals lowered (median cut 5.1%); South Chicago · Assessor: 18% of 1,822 appeals lowered (median cut 7.2%); West Chicago · Assessor: 20% of 6,281 appeals lowered (median cut 5.8%); Hyde Park · Board of Review: 43% of 5,401 appeals lowered (median cut 11.0%); Jefferson · Board of Review: 48% of 23,864 appeals lowered (median cut 6.1%); Lake · Board of Review: 52% of 14,427 appeals lowered (median cut 7.9%); Lake View · Board of Review: 45% of 8,901 appeals lowered (median cut 5.4%); North Chicago · Board of Review: 32% of 2,241 appeals lowered (median cut 5.9%); Rogers Park · Board of Review: 44% of 2,166 appeals lowered (median cut 5.6%); South Chicago · Board of Review: 43% of 3,421 appeals lowered (median cut 6.6%); West Chicago · Board of Review: 47% of 12,339 appeals lowered (median cut 8.0%)

Share of appeals on homes in the property classes our free check covers (202, 203, 204, 205, 206 and 8 more) that were lowered, unchanged or raised, by stage.Source: public appeal results for tax year 2025 from the county's open data, retrieved Sep 25, 2026; our calculation. Past results, not a prediction for any home.

Chicago filing windows on a calendar

  1. Hyde Park TownshipOct 8, 2026 · Cook County Assessor's Office · Open now
  2. Lake TownshipOct 29, 2026 · Cook County Assessor's Office · Open now
  3. Jefferson TownshipNov 12, 2026 · Cook County Assessor's Office · Open now
  4. North Chicago TownshipExpected Nov 24, 2026 – Dec 30, 2026 · Cook County Assessor's Office · Forecast, not an official date
  5. South Chicago TownshipExpected Dec 2, 2026 – Jan 7, 2027 · Cook County Assessor's Office · Forecast, not an official date
  6. Rogers Park TownshipExpected Apr 17, 2027 – Jul 19, 2027 · Cook County Assessor's Office · Forecast, not an official date
  7. West Chicago TownshipExpected Jun 20, 2027 – Aug 23, 2027 · Cook County Assessor's Office · Forecast, not an official date
  8. Lake View TownshipExpected Jul 13, 2027 – Dec 23, 2027 · Cook County Assessor's Office · Forecast, not an official date
  9. Rogers Park TownshipExpected Aug 11, 2027 – Sep 22, 2027 · Cook County Board of Review · Forecast, not an official date
  10. Lake View TownshipExpected Sep 8, 2027 – Oct 20, 2027 · Cook County Board of Review · Forecast, not an official date

The dashed line marks today.

Hyde Park Township: Oct 8, 2026; Lake Township: Oct 29, 2026; Jefferson Township: Nov 12, 2026; North Chicago Township: Expected Nov 24, 2026 – Dec 30, 2026; South Chicago Township: Expected Dec 2, 2026 – Jan 7, 2027; Rogers Park Township: Expected Apr 17, 2027 – Jul 19, 2027; West Chicago Township: Expected Jun 20, 2027 – Aug 23, 2027; Lake View Township: Expected Jul 13, 2027 – Dec 23, 2027; Rogers Park Township: Expected Aug 11, 2027 – Sep 22, 2027; Lake View Township: Expected Sep 8, 2027 – Oct 20, 2027

Each bar is a filing window from its opening day to its last day. Forecasts show the expected closing range and are not official dates.Source: the official calendars and rules cited in the sources list below.

Is Chicago being reassessed in 2026?

No. In 2026 Cook County is reassessing the south and west suburbs. The City of Chicago is next reassessed in 2027. You can still appeal your 2026 assessment in your township's window.

How much did the last Chicago reassessment change assessed values, by township?

Hyde Park Township (2024 reassessment): total assessed value grew 38% at the Assessor's initial reassessment, before appeals (tax year 2024). Jefferson Township (2024 reassessment): total assessed value grew 24% at the Assessor's initial reassessment, before appeals (tax year 2024).

Assessed value changeHyde Park
Hyde Park Township (2024 reassessment): total assessed value grew 38% at the Assessor's initial reassessment, before appeals.[5] (latest published: tax year 2024)
Assessed value changeJefferson
Jefferson Township (2024 reassessment): total assessed value grew 24% at the Assessor's initial reassessment, before appeals.[6] (latest published: tax year 2024)
Assessed value changeLake View
Lake View Township (2024 reassessment): total assessed value grew 27% at the Assessor's initial reassessment, before appeals.[7] (latest published: tax year 2024)
Assessed value changeLake
Lake Township (2024 reassessment): total assessed value grew 31% at the Assessor's initial reassessment, before appeals.[8] (latest published: tax year 2024)
Assessed value changeNorth Chicago
North Chicago Township (2024 reassessment): total assessed value grew 30% at the Assessor's initial reassessment, before appeals.[9] (latest published: tax year 2024)
Assessed value changeRogers Park
Rogers Park Township (2024 reassessment): total assessed value grew 32% at the Assessor's initial reassessment, before appeals.[10] (latest published: tax year 2024)
Assessed value changeSouth Chicago
South Chicago Township (2024 reassessment): total assessed value grew 25% at the Assessor's initial reassessment, before appeals.[11] (latest published: tax year 2024)
Assessed value changeWest Chicago
West Chicago Township (2024 reassessment): total assessed value grew 27% at the Assessor's initial reassessment, before appeals.[12] (latest published: tax year 2024)

More questions about Chicago property tax appeals

Common questions

Does the City of Chicago handle property tax appeals?

Chicago assessments are set by the Cook County Assessor and reviewed by the Cook County Board of Review, so appeals go to those two county offices.

Is there a fee to appeal in Chicago?

No. There is no fee at the Assessor or the Board of Review.

My township's dates aren't posted. What now?

Watch for your assessment notice; the last day to file is printed on it. We show a forecast until the Assessor posts the date, and we only send reminders for posted dates.

Other places nearby

Illinois property tax appeals: all counties

Where do these facts come from?

  1. [1]Assessment & Appeal Calendar (page last updated 9/24/26) - Cook County Assessor's OfficeOfficial notice, form, calendar or rules · last checked Oct 1, 2026
  2. [2]Learn about Reassessments (Valuation Reports) - Cook County Assessor's OfficeOfficial guide or FAQ · last checked Sep 25, 2026
  3. [3]35 ILCS 200/9-220 - Illinois Property Tax Code (ILGA; Wayback capture 2025-03-08)Statute or regulation · last checked Sep 24, 2026
  4. [4]Assessment & Appeal Calendar (page last updated 9/22/26) - Cook County Assessor's OfficeOfficial notice, form, calendar or rules · last checked Sep 24, 2026
  5. [5]Property Values for Hyde Park Township Released - Cook County Assessor's Office (press release, August 1, 2024)Official guide or FAQ · last checked Oct 1, 2026
  6. [6]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
  7. [7]Property Values for Lake View Township Released - Cook County Assessor's Office (press release, July 5, 2024)Official guide or FAQ · last checked Oct 1, 2026
  8. [8]Property Values for Lake Township Released - Cook County Assessor's Office (press release, August 30, 2024)Official guide or FAQ · last checked Oct 1, 2026
  9. [9]Property Values for North Chicago Township Released - Cook County Assessor's Office (press release, October 17, 2024)Official guide or FAQ · last checked Oct 1, 2026
  10. [10]Property Values for Rogers Park Township Released - Cook County Assessor's Office (press release, March 21, 2024)Official guide or FAQ · last checked Oct 1, 2026
  11. [11]Property Values for South Chicago Township Released - Cook County Assessor's Office (press release, October 31, 2024)Official guide or FAQ · last checked Oct 1, 2026
  12. [12]Property Values for West Chicago Township Released - Cook County Assessor's Office (press release, May 23, 2024)Official guide or FAQ · last checked Oct 1, 2026
  13. [13]35 ILCS 200/12-55 - Illinois Property Tax Code (ILGA; Wayback capture 2026-01-09)Statute or regulation · last checked Sep 24, 2026
  14. [14]Cook County Board of Review Dates and Deadlines 2026 Session (PDF, created 2026-09-14)Official notice, form, calendar or rules · last checked Sep 24, 2026
  15. [15]Frequently Asked Questions - Cook County Board of ReviewOfficial guide or FAQ · last checked Sep 24, 2026
  16. [16]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
  17. [17]Assessor Fritz Kaegi releases first property reassessments for City of Chicago - Cook County Assessor's Office (press release, June 16, 2021)Official guide or FAQ · last checked Oct 1, 2026
  18. [18]Property reassessments released for West Chicago Township - Cook County Assessor's Office (press release, July 27, 2021)Official guide or FAQ · last checked Oct 1, 2026
  19. [19]Property reassessments released for Lake View Township - Cook County Assessor's Office (press release, November 24, 2021)Official guide or FAQ · last checked Oct 1, 2026
  20. 20.County open data: cook assessmentsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  21. 21.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  22. 22.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  23. 23.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  24. 24.County open data: appeal resultsAggregated by us for the appeal-results chart.
  25. 25.County open data: appeal resultsAggregated by us for the appeal-results chart.

Not affiliated with Chicago or any government agency. Not legal advice. Not an appraisal.

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