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Illinois · County guide

DuPage County property tax appeal

A DuPage County property tax appeal goes to the DuPage County Board of Review. Appeals must be e-filed online within 30 days after your township's assessments are published, and each of the nine townships publishes on its own date.

This season

Next deadline
Expected Oct 17, 2026 – Jan 12, 2027
Forecast, not an official date
Wayne Township · DuPage County Board of Review
Source: Fall 2014 Wayne Township Newsletter - Wayne Township Assessor's OfficeLast checked

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Where to file
Online only (no fax or email)
Office address
421 North County Farm Road, Wheaton, Illinois 60187 · 630-407-5888
Our coverage
Free check available
  • Independent guide — not affiliated with DuPage 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 DuPage County property tax appeal?

Who hears a DuPage County appeal?

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

  1. 1

    DuPage County Board of Review

    Filing: complaint

  2. 2

    Illinois Property Tax Appeal Board

    Filing: appeal

Where is the DuPage County office?

DuPage County Board of Review[1]

Address
421 North County Farm Road, Wheaton, Illinois 60187
Fax
630-407-5860
Online
SmartFile

DuPage County office[2]

Address
421 N. County Farm Road, Wheaton, IL 60187
Hours
8 a.m. - 4:30 p.m. Monday - Friday

We are not affiliated with this office. Hours can change, so call before you visit.

Has the DuPage County property tax appeal deadline been announced?

Upcoming
Not announced yet
Last seasonWayne · DuPage County Board of Review
Closed January 12, 2024
Forecast
Expected around December 2026 (between October 17, 2026 and January 12, 2027), based on past deadlines for tax years 2014, 2015 and 2023
Last checked

We will update this page when the new dates are posted.

Which DuPage County filing windows are coming up?

DuPage County filing windows
ClosesAreaWho hears itStatus
Expected Oct 17, 2026 – Jan 12, 2027Wayne TownshipDuPage County Board of Review · Official source · Last checked Oct 3, 2026Forecast, not an official date

When were past DuPage County deadlines?

Past DuPage County filing windows
Tax yearWindowOffice
2023Closed January 12, 2024Wayne · DuPage County Board of Review
2015Closed December 11, 2015Wayne · DuPage County Board of Review
2014Closed October 17, 2014Wayne · DuPage County Board of Review

When is the DuPage County appeal deadline in 2026?

The last day to file is 30 days after your township's assessments are legally published. Talking to your township assessor first doesn't extend it.

How do I appeal my DuPage County assessment?

  1. Talk to your township assessor about your assessment. This is recommended, but it doesn't stop the filing clock.

  2. E-file your appeal on the Board of Review website within 30 days of your township's publication. Faxed or emailed appeals are not accepted.

  3. Upload your evidence when you file. If you have your own appraisal, it may follow up to 10 calendar days after the deadline.

What happens after the Board of Review?

A DuPage County Board of Review decision can be appealed to the state Property Tax Appeal Board (PTAB) within 30 days of the written decision notice. PTAB charges no filing fee. The Illinois page covers the PTAB rules.

Illinois appeal rules outside Cook County

When is the deadline to appeal a property tax assessment in DuPage County?

The next filing window we list is predicted, not yet announced: Expected around December 2026 (between October 17, 2026 and January 12, 2027), based on past deadlines for tax years 2014, 2015 and 2023 (predicted, not yet announced) — Wayne, DuPage County Board of Review. DuPage County Board of Review: In DuPage County, a Board of Review appeal must be e-filed within 30 days after your township's assessments are legally published.

Deadline ruleDuPage County Board of Review
In DuPage County, a Board of Review appeal must be e-filed within 30 days after your township's assessments are legally published.[1]
Deadline detailDuPage County Board of Review · Decisions
DuPage County Board of Review written decisions are mailed after all hearings in the county finish, typically the following March.[2]
Deadline detailDuPage County Board of Review · Late rejected
DuPage County rejects any Board of Review appeal submitted outside the 30-day filing period.[2]
Deadline detailDuPage County Board of Review · No extension
In DuPage County, talking with the Township Assessor does not extend the Board of Review filing period.[1]
Deadline detailDuPage County Board of Review · Property Tax Appeal Board
DuPage County Board of Review decisions can be appealed to the Illinois Property Tax Appeal Board within 30 days of the decision notice.[3]

Who decides a property tax appeal in DuPage County?

DuPage County Board of Review · Next step: After a DuPage County Board of Review decision, an owner may appeal to the Illinois Property Tax Appeal Board or to the Appellate/Circuit Court. DuPage County Board of Review: In DuPage County you file an assessment appeal with the Board of Review, ideally after discussing the assessment with your Township Assessor.

Appeal stepsDuPage County Board of Review · Next step
After a DuPage County Board of Review decision, an owner may appeal to the Illinois Property Tax Appeal Board or to the Appellate/Circuit Court.[2]
What the appeal is calledDuPage County Board of Review
In DuPage County you file an assessment appeal with the Board of Review, ideally after discussing the assessment with your Township Assessor.[1]

How do I file a property tax appeal in DuPage County?

DuPage County Board of Review appeals must be e-filed online. Faxed or emailed appeals are not accepted; help with online filing is available at the Board's office. DuPage County Board of Review · Electronic only: Beginning in 2026, the DuPage County Board of Review requires all appeals to be filed electronically.

How to fileDuPage County Board of Review
DuPage County Board of Review appeals must be e-filed online. Faxed or emailed appeals are not accepted; help with online filing is available at the Board's office.[1]
How to fileDuPage County Board of Review · Electronic only
Beginning in 2026, the DuPage County Board of Review requires all appeals to be filed electronically.[3]
How to fileDuPage County Board of Review · Portal
DuPage County Board of Review appeals are filed through the county's SmartFile appeal e-filing system.[2]
FormsDuPage County Board of Review
The DuPage County Board of Review posts its assessment appeal forms (attorney authorization, residential comparison grid, intervention request and undervaluation form) on the Supervisor of Assessments Forms and Documents page.[4]
FormsDuPage County Board of Review · Attachments
DuPage County residential appeals are filed online, where the Attorney Authorization and Residential Comparison Grid forms can be downloaded and attached as PDF, TXT, JPG, PNG or TIFF files.[5]
FormsDuPage County Board of Review · Prescribed
The DuPage County Board of Review asks all parties to use its prescribed forms and comparison grids.[6]
Who may fileDuPage County Board of Review
The DuPage Board of Review accepts complaints from the owner, the taxpayer or an Illinois attorney. Corporations and LLCs need an Illinois attorney.[1]
Who may fileDuPage County Board of Review · Authorization
In DuPage County, an appeal filed by anyone other than the owner must attach a Representative Authorization Form or it is rejected.[5]
Informal reviewTownship assessor
DuPage County encourages owners to first call or visit their Township Assessor to review their property file before appealing.[2]
Informal reviewDuPage County Board of Review
DuPage's Board of Review recommends talking to your township assessor first, but that doesn't extend the filing deadline.[1]
HearingsDuPage County Board of Review
On a DuPage County residential appeal you choose to be heard in person (by phone) or not to attend; all appeals are treated equally either way.[5]
HearingsDuPage County Board of Review · Basis
DuPage County's Board of Review decides on the evidence submitted by the appellant and the assessor.[1]

Upcoming appeal deadlines in every county we track

What applies to my township?

Each township has its own page with its dates. Your township is printed on your assessment notice.

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

What evidence does the DuPage Board of Review look at?

The Board says usually three (but not more than five) comparable homes with sales close to January 1 of the tax year give strong evidence of market value.

Who can file a DuPage County appeal?

The owner, the taxpayer or an Illinois attorney may file. Corporations and LLCs must use an Illinois attorney. Not legal advice.

Can my assessment go up if I appeal?

Yes, it can. The DuPage County Board of Review, like other Illinois county boards outside Cook, may raise an assessment, but only after notifying the owner and giving a chance to be heard.

What evidence can I use in DuPage County?

DuPage County Board of Review: DuPage County residential appeals can be based on a recent sale, comparable sales (at least three sold within the last three years), assessment equity (at least three current-year comparables), recent construction, a recent appraisal, contention of law or another explained reason. DuPage County Board of Review · Comparable properties: The DuPage Board of Review says usually three (but not more than five) comparable homes with sales near January 1 of the tax year give strong evidence of market value.

Evidence acceptedDuPage County Board of Review
DuPage County residential appeals can be based on a recent sale, comparable sales (at least three sold within the last three years), assessment equity (at least three current-year comparables), recent construction, a recent appraisal, contention of law or another explained reason.[5]
Evidence ruleDuPage County Board of Review · Comparable properties
The DuPage Board of Review says usually three (but not more than five) comparable homes with sales near January 1 of the tax year give strong evidence of market value.[1]
Evidence ruleDuPage County Board of Review · Timing
In DuPage County, evidence is due when you file; an appraisal report may follow up to 10 calendar days after the filing deadline.[1]

Can my assessment go up if I appeal in DuPage County?

DuPage County Board of Review: The DuPage Board of Review can start proceedings to raise an under-assessment, after sending the owner a notice to show cause.

Can the value go up?DuPage County Board of Review
The DuPage Board of Review can start proceedings to raise an under-assessment, after sending the owner a notice to show cause.[1]

Which exemptions can lower my bill without an appeal?

In DuPage County the General Homestead Exemption on a principal residence is administered by the Township Assessors and is generally granted automatically.

Homestead
In DuPage County the General Homestead Exemption on a principal residence is administered by the Township Assessors and is generally granted automatically.[4]

Which Illinois rules apply in DuPage County?

These rules are the same in every Illinois county. Each link opens the rule on the Illinois page.

What do DuPage County 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.

What do homeowners in DuPage County pay in property tax?

The median owner-occupied home in DuPage County was worth $391,400, and the median property tax its owners paid was $8,007 a year, according to the Census Bureau's American Community Survey.

Median home value
$391,400
Margin of error ±$2,511.
Median property tax paid per year
$8,007
Margin of error ±$58.
Median tax as a share of median value
2.05%
A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
Owner-occupied homes
256,474
Margin of error ±1,879.

These are survey estimates of what owners reported about their own homes. They are not assessed values, not tax rates, and not an opinion of what any home is worth.

They cannot tell you whether your own assessment is fair. That takes a comparison with similar homes, which we offer only in counties we have researched.

From the county's assessment and appeal records

Homes in the county's assessment records
307,557
Median assessed value
$131,694
Middle half of assessed values
$93,879 to $183,455

Source: The county's open assessment data, aggregated by us (tax year 2025 final values). Our calculation from public records; not an opinion of any home's value.

How DuPage County home assessments are spread

Assessed values of 307,557 homes in the property classes our free check covers (R), tax year 2025 final values. Half are between $93,879 and $183,455; the median is $131,694. The last bar holds everything above it.Source: Assessment records from the county's open data (tax year 2025 final values), retrieved Sep 27, 2026; our calculation.

Median home assessment by township

  1. Area 10$163,684
  2. Area 09$152,280
  3. Area 05$149,787
  4. Area 08$148,099
  5. Area 07$135,923
  6. Area 06$131,080
  7. Area 01$128,891
  8. Area 03$117,163
  9. Area 02$110,924
  10. Area 04$102,652

Median assessed value by township: highest Area 10 ($163,684), lowest Area 04 ($102,652).

Median assessed value of homes in the property classes our free check covers (R) for each township with at least 50 such homes, tax year 2025 final values.Source: Assessment records from the county's open data (tax year 2025 final values), retrieved Sep 27, 2026; our calculation.

Median home value: DuPage County compared

  1. DuPage County$391,400
  2. Typical Illinois county$134,650
  3. Typical US county$185,300

DuPage County $391,400; Typical US county $185,300; Typical Illinois county $134,650

Census survey medians for owner-occupied homes. "Typical" is the middle county of the 102 in Illinois and of all US counties.Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25077.

Median property tax paid: DuPage County compared

  1. DuPage County$8,007
  2. Typical Illinois county$2,431
  3. Typical US county$1,619

DuPage County $8,007 a year; Typical Illinois county $2,431 a year; Typical US county $1,619 a year

Census survey medians for owner-occupied homes. "Typical" is the middle county of the 102 in Illinois and of all US counties.Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25103.

How often is property reassessed in DuPage County?

DuPage County holds a general reassessment every four years (2019 and 2023, for example), when every parcel gets a change-of-assessment notice. Sales basis: DuPage County assessed values are based on the three prior years of sales; the 2025 values used 2022-2024 sales.

Reassessment cycle
DuPage County holds a general reassessment every four years (2019 and 2023, for example), when every parcel gets a change-of-assessment notice.[7]
Level of assessmentSales basis
DuPage County assessed values are based on the three prior years of sales; the 2025 values used 2022-2024 sales.[2]

Homes in DuPage County

From the Census Bureau's American Community Survey: how old the homes are, what kind they are, what owners say they are worth and the property taxes they pay. These figures describe all homes together, not any one home.

Median year built
1978
All housing units, owned and rented
Single-family houses, detached or attached
70%
of 367,152 housing units
Owned homes with a mortgage or similar loan
65%
of 256,474 owner-occupied homes

Home values reported by owners

  1. Less than $50,0002%
  2. $50,000 to $99,9991%
  3. $100,000 to $199,9998%
  4. $200,000 to $299,99918%
  5. $300,000 to $399,99923%
  6. $400,000 to $499,99918%
  7. $500,000 to $749,99919%
  8. $750,000 to $999,9996%
  9. $1,000,000 to $1,999,9994%
  10. $2,000,000 or more1%

Home values reported by owners in DuPage County: Less than $50,000 2%; $50,000 to $99,999 1%; $100,000 to $199,999 8%; $200,000 to $299,999 18%; $300,000 to $399,999 23%; $400,000 to $499,999 18%; $500,000 to $749,999 19%; $750,000 to $999,999 6%; $1,000,000 to $1,999,999 4%; $2,000,000 or more 1%.

Share of owner-occupied homes in each value range. Owners give this value in the survey; it is not the assessed value.Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates, table B25075.

Property taxes owners pay a year

  1. No real estate taxes1%
  2. Less than $8002%
  3. $800 to $1,4992%
  4. $1,500 to $1,9991%
  5. $2,000 to $2,9994%
  6. $3,000 or more90%

Property taxes owners pay a year in DuPage County: No real estate taxes 1%; Less than $800 2%; $800 to $1,499 2%; $1,500 to $1,999 1%; $2,000 to $2,999 4%; $3,000 or more 90%.

Share of owner-occupied homes by the real estate taxes paid in a year, with or without a mortgage.Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates, table B25102.

Source: U.S. Census Bureau, American Community Survey (2020–2024 5-year estimates, tables B25075, B25102, B25035, B25024 and B25081), retrieved Oct 1, 2026. Survey estimates have a margin of error.

More questions about DuPage County property tax appeals

When is the DuPage County property tax appeal deadline?

The last DuPage County Board of Review deadline (January 12, 2024) has passed. Next deadline: expected around December 2026 (between October 17, 2026 and January 12, 2027), based on past deadlines for tax years 2014, 2015 and 2023. We'll confirm it when the county announces it. DuPage County Board of Review: In DuPage County, a Board of Review appeal must be e-filed within 30 days after your township's assessments are legally published.[1][8][9][10]

Where do I file a Board of Review appeal in DuPage County?

DuPage County Board of Review appeals must be e-filed online. Faxed or emailed appeals are not accepted; help with online filing is available at the Board's office.[1]

Can my assessed value go up if I appeal in DuPage County?

The DuPage Board of Review can start proceedings to raise an under-assessment, after sending the owner a notice to show cause.[1]

Which details are not confirmed yet?

We show a fact only after a person has checked it against the official source. These are still being checked. Until then, ask the DuPage County Board of Review:

  • Filing fee

Property tax guides for DuPage County homeowners

Counties next to DuPage County

Illinois property tax appeals: all counties

Check a DuPage County home free

Check my property

You decide and file yourself.

Where do these facts come from?

  1. [1]Rules of the Board of Review - DuPage County, IL (Wayback capture 2026-08-13)Official notice, form, calendar or rules · last checked Sep 29, 2026
  2. [2]Appeal Process | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Sep 30, 2026
  3. [3]Board of Review | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Sep 30, 2026
  4. [4]Forms and Documents | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Sep 30, 2026
  5. [5]Residential Appeal Filing Instructions | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Sep 30, 2026
  6. [6]Rules of the Board of Review | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Sep 30, 2026
  7. [7]Assessment Status | DuPage Co, IL (Supervisor of Assessments)Official notice, form, calendar or rules · last checked Oct 1, 2026
  8. [8]Fall 2014 Wayne Township Newsletter - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  9. [9]Spring 2016 Wayne Township Newsletter - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  10. [10]2023 General Assessment - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  11. [11]35 ILCS 200/16-55 - Illinois Property Tax Code (ILGA; Wayback capture 2025-12-22)Statute or regulation · last checked Sep 24, 2026
  12. [12]Assessment Appeals - Property Tax (Illinois Department of Revenue)Official guide or FAQ · last checked Sep 30, 2026
  13. [13]86 Ill. Adm. Code 1910.50 - Property Tax Appeal Board rules (JCAR/ILGA; Wayback capture 2026-05-06)Statute or regulation · last checked Sep 24, 2026
  14. [14]Assessors Office - Addison TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  15. [15]Township Assessor Directory | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Oct 1, 2026
  16. [16]Appeals - Bloomingdale Township Assessor’s OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  17. [17]Bloomingdale Township Assessor’s Office | DuPage County, ILOfficial guide or FAQ · last checked Oct 1, 2026
  18. [18]Appeal - Naperville Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  19. [19]Contact Information - Naperville TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  20. [20]Appeal Info - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  21. [21]2026 Assessments - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  22. [22]Welcome - Wayne Township Assessor's OfficeOfficial guide or FAQ · last checked Oct 1, 2026
  23. [23]Wayne Township Assessor's Office - HomeOfficial guide or FAQ · last checked Oct 1, 2026
  24. [24]2026 Assessments & Publication – York TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  25. [25]Assessor’s Home – York TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  26. [26]Contact Us – York TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  27. [27]Assessment Cycle & Appeals – York TownshipOfficial guide or FAQ · last checked Oct 1, 2026
  28. 28.County open data: dupage assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
  29. 29.County open data: dupage assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
  30. 30.County open data: dupage parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
  31. 31.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — DuPage County, Illinois
  32. 32.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — DuPage County, Illinois
  33. 33.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — DuPage County, Illinois

Data credits: Census ACS (public domain) · Census county adjacency (public domain)

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

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