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Illinois · County guide

Kendall County property tax appeal

For a Kendall County property tax appeal in 2026, the final filing date for assessment complaints with the Kendall County Board of Review is October 19, 2026. Contact your township assessor first; if you're not satisfied, file a complaint with the Board.

This season

Next deadline
Oct 19, 2026
Open now
Kendall County Board of Review
Source: Kendall County Annual Assessments (Supervisor of Assessments)Last checked

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Megan HollisHomeowner
Where
Kendall County Board of Review, 504 S. Main St., Yorkville
Values as of
January 1, 2026
Office address
504 S. Main St., Yorkville, IL 60560 · 630-553-4146
Our coverage
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  • Independent guide — not affiliated with Kendall 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 Kendall County property tax appeal?

Who hears a Kendall County appeal?

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

  1. 1

    Kendall County Board of Review

    Filing: complaint

    Open now
  2. 2

    Illinois Property Tax Appeal Board

    Filing: appeal

Where is the Kendall County office?

Kendall County Board of Review[3]

Address
504 S. Main St., Yorkville, IL 60560

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

Which Kendall County filing windows are coming up?

Kendall County filing windows
ClosesAreaWho hears itStatus
Oct 19, 2026CountywideKendall County Board of Review · Official source · Last checked Oct 3, 2026Open now

When is the Kendall County appeal deadline in 2026?

The final filing date for 2026 is October 19, 2026. The deadline is 30 days after publication, and after it the Board can't accept complaints.

How do I appeal my Kendall County assessment?

  1. Ask your township assessor to review the assessment.

  2. Fill in the Board of Review's residential appeal form, one parcel per form, including the comparison grid for three comparable homes.

  3. Use sales from January 1, 2025 through July 1, 2026.

  4. Choose whether to attend the hearing or have the Board decide on your evidence.

What happens after the Board of Review?

A Kendall 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 Kendall County?

The soonest deadline we list: Kendall County, Kendall County Board of Review — Closes October 19, 2026. Kendall County Board of Review: In Kendall County, the Board of Review filing deadline is 30 days after the assessment publication date; after that the Board can't accept complaints.

Deadline ruleKendall County Board of Review
In Kendall County, the Board of Review filing deadline is 30 days after the assessment publication date; after that the Board can't accept complaints.[1]
When a filing counts as on timeKendall County Board of Review
In Kendall County the final filing deadline for a township is 30 days after the assessment publication date.[1]
Deadline detailKendall County Board of Review · Property Tax Appeal Board
Kendall County Board of Review decisions can be appealed to the Illinois Property Tax Appeal Board within 30 days of the date printed on the written decision.[2]

Who decides a property tax appeal in Kendall County?

Kendall County Board of Review: In Kendall County, after a township assessor review, a taxpayer files a complaint (the Residential Assessment Appeal form) with the Kendall County Board of Review.

What the appeal is calledKendall County Board of Review
In Kendall County, after a township assessor review, a taxpayer files a complaint (the Residential Assessment Appeal form) with the Kendall County Board of Review.[1]

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

Kendall County Board of Review complaints go to 504 S. Main St., Yorkville; forms, instructions and the Board's rules are available by phone at (630) 553-4146 or on kendallcountyil.gov. Kendall County Board of Review · Restrictions: Kendall County Board of Review complaint forms and grids must be filed with the Clerk of the Board of Review; emailed or faxed copies are not accepted.

How to fileKendall County Board of Review
Kendall County Board of Review complaints go to 504 S. Main St., Yorkville; forms, instructions and the Board's rules are available by phone at (630) 553-4146 or on kendallcountyil.gov.[1]
How to fileKendall County Board of Review · Restrictions
Kendall County Board of Review complaint forms and grids must be filed with the Clerk of the Board of Review; emailed or faxed copies are not accepted.[2]
FormsKendall County Board of Review
Kendall County's residential appeal form covers one parcel per form, and its comparison grid (three comparable homes) must be filled out and submitted.[3]
FormsKendall County Board of Review · Rules
Kendall County Board of Review complaints must be on the Board's forms, one form per parcel, signed by the property owner.[2]
Who may fileKendall County Board of Review
If a Kendall County owner is represented by an attorney, the owner's signature or a letter of authorization must be filed with the complaint, or no hearing is scheduled.[3]
Who may fileKendall County Board of Review · Attorney only
In Kendall County you do not need an attorney to file a Board of Review complaint; anyone representing an owner must be an Illinois-licensed attorney.[2]
Informal reviewKendall County Board of Review
In Kendall County, contact your township assessor first; if you are not satisfied, file a complaint with the Board of Review.[1]
HearingsKendall County Board of Review
On the Kendall County form you can ask for a hearing or ask the Board to decide on your evidence without one.[3]
HearingsKendall County Board of Review · Remote
Kendall County Board of Review hearings are scheduled by mail notice and are in person only; telephone or electronic hearings are not available.[2]

Upcoming appeal deadlines in every county we track

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

Can my assessment go up if I appeal?

Yes, it can. The Kendall 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 Kendall County?

Kendall County Board of Review: Kendall County's residential appeal form lists these reasons: a recent sale, fair market value shown by comparable sales, and uniformity (assessment equity). Kendall County Board of Review · Appraisals: In Kendall County an appraisal used as evidence must be by a Licensed Illinois Real Estate Appraiser with a January 1 effective date; an appraisal is not required.

Evidence acceptedKendall County Board of Review
Kendall County's residential appeal form lists these reasons: a recent sale, fair market value shown by comparable sales, and uniformity (assessment equity).[3]
Evidence ruleKendall County Board of Review · Appraisals
In Kendall County an appraisal used as evidence must be by a Licensed Illinois Real Estate Appraiser with a January 1 effective date; an appraisal is not required.[2]
Evidence ruleKendall County Board of Review · Comparable properties
Kendall County's Board of Review asks for the best 3 comparables and will not consider residential sales more than 12 months before the January 1 lien date.[2]
Evidence ruleKendall County Board of Review · Grid
Kendall County's residential appeal requires the page-2 residential grid sheet and one parcel per form.[3]
Evidence ruleKendall County Board of Review · Grid resubmit
In Kendall County an incomplete or homemade comparison grid is returned by email and must be resubmitted within 10 business days.[2]
Evidence ruleKendall County Board of Review · Sale dates
On Kendall County's 2026 residential appeal form, sales must be between January 1, 2025 and July 1, 2026.[3]
Evidence ruleKendall County Board of Review · Sale lookback
For a Kendall County residential market-value appeal, sales more than 12 months before the January 1 lien date are not considered.[2]
Evidence ruleKendall County Board of Review · Timing
In Kendall County all evidence (appraisal or comparable sales) must be submitted with the complaint; no evidence is accepted at the hearing.[2]
Evidence ruleKendall County Board of Review · Uniformity measure
On the Kendall County grid, uniformity is compared as the building assessment divided by the above-ground living area.[3]

Which Illinois rules apply in Kendall County?

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

What do Kendall 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 Kendall County pay in property tax?

The median owner-occupied home in Kendall County was worth $322,400, and the median property tax its owners paid was $7,651 a year, according to the Census Bureau's American Community Survey.

Median home value
$322,400
Margin of error ±$5,720.
Median property tax paid per year
$7,651
Margin of error ±$221.
Median tax as a share of median value
2.37%
A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
Owner-occupied homes
38,125
Margin of error ±807.

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
45,592
Median assessed value
$125,396
Middle half of assessed values
$96,265 to $147,680

Source: The county's open assessment data, aggregated by us (tax year 2026 assessor-certified values). Our calculation from public records; not an opinion of any home's value.

How Kendall County home assessments are spread

Assessed values of 45,592 homes in the property classes our free check covers (0040), tax year 2026 Assessor-certified values. Half are between $96,265 and $147,680; the median is $125,396. The last bar holds everything above it.Source: Assessment records from the county's open data (tax year 2026 Assessor-certified values), retrieved Sep 26, 2026; our calculation.

Median home assessment by township

  1. Fox Township$146,611
  2. Kendall Township$136,830
  3. Na-Au-Say Township$132,301
  4. Oswego Township$126,917
  5. Bristol Township$126,829
  6. Seward Township$126,349
  7. Lisbon Township$101,582
  8. Little Rock Township$95,201
  9. Big Grove Township$92,239

Median assessed value by township: highest Fox Township ($146,611), lowest Big Grove Township ($92,239).

Median assessed value of homes in the property classes our free check covers (0040) for each township with at least 50 such homes, tax year 2026 Assessor-certified values.Source: Assessment records from the county's open data (tax year 2026 Assessor-certified values), retrieved Sep 26, 2026; our calculation.

Median home value: Kendall County compared

  1. Kendall County$322,400
  2. Typical Illinois county$134,650
  3. Typical US county$185,300

Kendall County $322,400; 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: Kendall County compared

  1. Kendall County$7,651
  2. Typical Illinois county$2,431
  3. Typical US county$1,619

Kendall County $7,651 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.

Kendall County filing windows on a calendar

  1. Kendall County Board of ReviewOct 19, 2026 · Open now

The dashed line marks today.

Kendall County Board of Review: Oct 19, 2026

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 are Kendall County homes valued for 2026?

Homes are assessed at 33.33% of market value as of January 1, 2026, based on sales from 2023, 2024 and 2025.

How often is property reassessed in Kendall County?

Kendall County 2026 values are as of January 1, 2026, at a 33.33% level of assessment, based on 2023-2025 sales. Kendall County assesses property (other than farmland and coal) at a 33.33% median level of fair cash value.

Valuation date
Kendall County 2026 values are as of January 1, 2026, at a 33.33% level of assessment, based on 2023-2025 sales.[1]
Level of assessment
Kendall County assesses property (other than farmland and coal) at a 33.33% median level of fair cash value.[1]

Homes in Kendall 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
2001
All housing units, owned and rented
Single-family houses, detached or attached
91%
of 46,589 housing units
Owned homes with a mortgage or similar loan
77%
of 38,125 owner-occupied homes

Home values reported by owners

  1. Less than $50,0002%
  2. $50,000 to $99,9991%
  3. $100,000 to $199,9997%
  4. $200,000 to $299,99933%
  5. $300,000 to $399,99932%
  6. $400,000 to $499,99917%
  7. $500,000 to $749,9997%
  8. $750,000 to $999,9991%
  9. $1,000,000 to $1,999,999<1%
  10. $2,000,000 or more<1%

Home values reported by owners in Kendall County: Less than $50,000 2%; $50,000 to $99,999 1%; $100,000 to $199,999 7%; $200,000 to $299,999 33%; $300,000 to $399,999 32%; $400,000 to $499,999 17%; $500,000 to $749,999 7%; $750,000 to $999,999 1%; $1,000,000 to $1,999,999 <1%; $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 taxes2%
  2. Less than $8001%
  3. $800 to $1,4991%
  4. $1,500 to $1,9991%
  5. $2,000 to $2,9992%
  6. $3,000 or more92%

Property taxes owners pay a year in Kendall County: No real estate taxes 2%; Less than $800 1%; $800 to $1,499 1%; $1,500 to $1,999 1%; $2,000 to $2,999 2%; $3,000 or more 92%.

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 Kendall County property tax appeals

When is the Kendall County property tax appeal deadline?

The Kendall County Board of Review window closes October 19, 2026. Kendall County Board of Review: In Kendall County, the Board of Review filing deadline is 30 days after the assessment publication date; after that the Board can't accept complaints.[1]

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

Kendall County Board of Review complaints go to 504 S. Main St., Yorkville; forms, instructions and the Board's rules are available by phone at (630) 553-4146 or on kendallcountyil.gov.[1]

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

The same Illinois rule applies in every county.[6] Read the Illinois rule

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 Kendall County Board of Review:

  • How often homes are reassessed
  • Filing fee

Property tax guides for Kendall County homeowners

Counties next to Kendall County

Illinois property tax appeals: all counties

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Where do these facts come from?

  1. [1]Kendall County Annual Assessments (Supervisor of Assessments)Official notice, form, calendar or rules · last checked Sep 29, 2026
  2. [2]Kendall County Board of Review Rules 2026 (PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  3. [3]Residential Assessment Appeal for Year January 1, 2026 - Kendall County Board of Review (form)Official notice, form, calendar or rules · last checked Sep 29, 2026
  4. [4]Assessment Appeals - Property Tax (Illinois Department of Revenue)Official guide or FAQ · last checked Sep 30, 2026
  5. [5]Property Tax - Exemption Information (PIO-74) (Illinois Department of Revenue)Official guide or FAQ · last checked Sep 30, 2026
  6. [6]35 ILCS 200/16-55 - Illinois Property Tax Code (ILGA; Wayback capture 2025-12-22)Statute or regulation · last checked Sep 24, 2026
  7. 7.County open data: kendall assessmentsRetrieved Sep 26, 2026; aggregated by us for the charts above.
  8. 8.County open data: kendall assessmentsRetrieved Sep 26, 2026; aggregated by us for the charts above.
  9. 9.County open data: kendall assessmentsRetrieved Sep 26, 2026; aggregated by us for the charts above.
  10. 10.County open data: kendall assessmentsRetrieved Sep 26, 2026; aggregated by us for the charts above.
  11. 11.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — Kendall County, Illinois
  12. 12.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — Kendall County, Illinois
  13. 13.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — Kendall County, Illinois

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

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

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