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Cook County · Illinois

Berwyn Township property tax appeals

A Berwyn Township property tax appeal starts with the Cook County Assessor's Office, then the Cook County Board of Review. This season's deadline has not been announced yet. Our forecast for Berwyn Township, Cook County Assessor's Office: May 24, 2027 – Jul 6, 2027 (not an official date).

Next deadline
Expected May 24, 2027 – Jul 6, 2027
Forecast, not an official date
Berwyn Township · Cook County Assessor's Office
Source: 35 ILCS 200/12-55 - Illinois Property Tax Code (ILGA; Wayback capture 2026-01-09)Last checked

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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 first
Cook County Assessor's Office
Our coverage
Free check available
  • Independent guide — not affiliated with Berwyn, 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 Berwyn Township property tax appeal?

Who hears a Berwyn Township 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 Berwyn Township filing windows are coming up?

Berwyn Township filing windows
ClosesAreaWho hears itStatus
Expected May 24, 2027 – Jul 6, 2027Berwyn TownshipCook County Assessor's Office · Official source · Last checked Oct 3, 2026Forecast, not an official date
Expected Sep 8, 2027 – Oct 20, 2027Berwyn TownshipCook County Board of Review · Official source · Last checked Oct 3, 2026Forecast, not an official date

When were past Berwyn Township deadlines?

Past Berwyn Township filing windows
Tax yearWindowOffice
2026Closed September 29, 2026Berwyn · Cook County Board of Review
2026Closed July 6, 2026Berwyn · Cook County Assessor's Office
2023Closed May 24, 2023Berwyn · Cook County Assessor's Office
2020Closed June 23, 2020Berwyn · Cook County Assessor's Office

When is the Berwyn appeal deadline?

Cook County Assessor's Office: Expected around June 2027 (between May 24, 2027 and July 6, 2027), based on past deadlines for tax years 2020, 2023 and 2026 (predicted, not yet announced). Cook County Board of Review: Expected to close between September 8, 2027 and October 20, 2027 (predicted, not yet announced). We'll confirm these dates when the county posts them.

Deadline detailBoard of Review re-review
Berwyn Township, tax year 2025: the Board of Review's decision date was Feb 3, 2026 and the re-review period closed Feb 5, 2026; the Assessor (CCAO) certification date was Apr 9, 2026.[1] (latest published: tax year 2025)
Deadline detailNotice mailed
Berwyn Township (2026 reassessment): Reassessment Notices were mailed May 21, 2026; appeals were due Jul 6, 2026.[2]

Who can answer questions about my assessment?

Hours: Berwyn Township Assessor's office hours: Monday, Wednesday and Thursday 9:00 A.M. to 5:00 P.M. Tuesday: 9:00 A.M. to 8:00 P.M. Friday: 9:00 A.M to 2:00 P.M. Office: The Berwyn Township Assessor's office is at 6600 W. 26th St. Berwyn, IL 60402; phone (708) 788-6600.

ContactHours
Berwyn Township Assessor's office hours: Monday, Wednesday and Thursday 9:00 A.M. to 5:00 P.M. Tuesday: 9:00 A.M. to 8:00 P.M. Friday: 9:00 A.M to 2:00 P.M.[6]
ContactOffice
The Berwyn Township Assessor's office is at 6600 W. 26th St. Berwyn, IL 60402; phone (708) 788-6600.[6]

Upcoming appeal deadlines in every county we track

What do Berwyn 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 Berwyn Township home assessments are spread

Assessed values of 12,734 homes in the property classes our free check covers (202, 203, 204, 205, 206 and 8 more), tax year 2025 values after the Board of Review. Half are between $22,000 and $29,304; the median is $25,000. The last bar holds everything above it.Source: Assessment records from the county's open data (tax year 2025 values after the Board of Review), retrieved Sep 25, 2026; our calculation.

Berwyn Township compared with other townships

  1. Palos$32,595
  2. Hanover$31,000
  3. Leyden$30,000
  4. West Chicago$30,000
  5. Berwyn$25,000
  6. Proviso$24,000
  7. Stickney$23,000
  8. Worth$23,000
  9. Cicero$22,000

Ranked 27 of 38; showing the 9 nearest in rank.

Median assessed value by township: highest North Chicago ($135,400), lowest Thornton ($12,000).

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.

How much home assessments changed, by township

  1. River Forest+27.8%
  2. Berwyn+24.0%
  3. Oak Park+22.2%
  4. Stickney+21.1%
  5. Riverside+20.4%
  6. Cicero+20.0%
  7. Palos+20.0%
  8. Elk Grove0.0%
  9. Evanston0.0%

Ranked 2 of 14; showing the 9 nearest in rank.

Median change in assessed value from tax year 2025 values after the Board of Review to tax year 2026 Assessor-certified values: Berwyn +24.0%, Cicero +20.0%, Elk Grove 0.0%, Evanston 0.0%, Maine 0.0%, New Trier 0.0% and more.

Median change per home from tax year 2025 values after the Board of Review to tax year 2026 Assessor-certified values, for homes with a value at both stages. 14 townships have the newer values so far.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 Berwyn Township appeals in tax year 2025

  1. Assessor12% lowered of 2,281
  2. Board of Review44% lowered of 2,770

Assessor: 12% of 2,281 appeals lowered (median cut 6.1%); Board of Review: 44% of 2,770 appeals lowered (median cut 7.3%)

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.

Berwyn Township filing windows on a calendar

  1. Berwyn TownshipExpected May 24, 2027 – Jul 6, 2027 · Cook County Assessor's Office · Forecast, not an official date
  2. Berwyn TownshipExpected Sep 8, 2027 – Oct 20, 2027 · Cook County Board of Review · Forecast, not an official date

Berwyn Township: Expected May 24, 2027 – Jul 6, 2027; Berwyn 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.

How often is property reassessed in Berwyn?

Berwyn Township is reassessed every three years with the South and West Suburbs; its scheduled reassessment years are 2026, 2029 and 2032.

Reassessment cycle
Berwyn Township is reassessed every three years with the South and West Suburbs; its scheduled reassessment years are 2026, 2029 and 2032.[3]

What do home values and property taxes look like in Berwyn?

Berwyn Township (2020 reassessment): total assessed value grew 19.2% at the Assessor's initial reassessment, before appeals (tax year 2020). Berwyn Township (2026 reassessment): the Assessor's median estimated market value for single-family homes was $300,000 (median 2025 sale price $328,000).

Assessed value change
Berwyn Township (2020 reassessment): total assessed value grew 19.2% at the Assessor's initial reassessment, before appeals.[4] (latest published: tax year 2020)
Median assessor estimate
Berwyn Township (2026 reassessment): the Assessor's median estimated market value for single-family homes was $300,000 (median 2025 sale price $328,000).[2]
Median condo price
Berwyn Township (2026 reassessment): condos had a median 2025 sale price of $152,000; the Assessor's median estimate was $143,000.[2]
Median sale price
Berwyn Township (2026 reassessment): the median sale price of single-family homes in 2025 was $328,000; the Assessor's median market value estimate for the class was $300,000.[5]
Median small apartment price
Berwyn Township (2026 reassessment): small apartment buildings had a median 2025 sale price of $450,000; the Assessor's median estimate was $399,000.[2]

Other places nearby

Illinois property tax appeals: all counties

Where do these facts come from?

  1. [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. [2]Berwyn: Residential Valuations - Cook County Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  3. [3]Township Triennial Reassessment Schedule (PDF) - Cook County Board of ReviewOfficial notice, form, calendar or rules · last checked Oct 1, 2026
  4. [4]Berwyn Township Properties Reassessed - Cook County Assessor's Office (press release, May 28, 2020)Official guide or FAQ · last checked Oct 1, 2026
  5. [5]Property Values for Berwyn Township Released - Cook County Assessor's Office (press release, May 27, 2026)Official guide or FAQ · last checked Oct 1, 2026
  6. [6]Cook County Township Assessors - Cook County Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  7. [7]Assessment & Appeal Calendar (page last updated 9/22/26) - Cook County Assessor's OfficeOfficial notice, form, calendar or rules · last checked Sep 24, 2026
  8. [8]35 ILCS 200/12-55 - Illinois Property Tax Code (ILGA; Wayback capture 2026-01-09)Statute or regulation · last checked Sep 24, 2026
  9. [9]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
  10. [10]Frequently Asked Questions - Cook County Board of ReviewOfficial guide or FAQ · last checked Sep 24, 2026
  11. [11]Property Values for Berwyn Township Released - Cook County Assessor's Office (press release, May 4, 2023)Official guide or FAQ · last checked Oct 1, 2026
  12. 12.County open data: cook assessmentsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  13. 13.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  14. 14.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  15. 15.County open data: cook parcelsRetrieved Sep 25, 2026; aggregated by us for the charts above.
  16. 16.County open data: appeal resultsAggregated by us for the appeal-results chart.
  17. 17.County open data: appeal resultsAggregated by us for the appeal-results chart.

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

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