AppealDesk

LaSalle County Property Tax Appeal, Illinois

Travis BunnTravis Bunn·Updated July 24, 2026

LaSalle County is located in the Fox Valley and Illinois River Valley regions of northern Illinois, with a population of approximately 109,658 as of the 2020 Census. The county seat and largest city is Ottawa, with other major population centers including Streator, Peru, LaSalle, and Marseilles. Property tax appeals are particularly important here, as LaSalle County has one of the highest effective property tax rates in the nation at 2.1%, which is more than 1.9 times the national average of 1.11%. This means homeowners in LaSalle County face a significantly higher tax burden than most Americans. The median annual property tax bill of $2,632 is above the national median of $2,400, making it crucial to ensure your property is not overassessed.

Notable cities: Ottawa, Streator, Peru, LaSalle, Marseilles

Median Home

$125,500

Tax Rate

2.10%

Annual Tax

$2,632

Population

109,658

On the typical LaSalle County home, valued near $125,500 at the county’s effective tax rate of 2.10%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: 30 days from township publication date, or December 1, 2026 for all 2026 assessments

Each township has assessment notices published on different dates (typically late October). You must file your appeal within 30 days of the publication date for your specific township. The universal deadline for ALL 2026 assessment appeals in LaSalle County is December 1, 2026. After this date, the Board of Review will no longer accept 2026 complaints but will accept 2027 complaints for the 2028 tax year.

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Aerial view of an Illinois residential neighborhood. LaSalle County appeal guide.

How LaSalle County Assesses Property

33.33%of market value

Assessed by: LaSalle County Chief Assessment Officer

Assessment cycle: annual

Notices typically mailed: Spring (typically mid-May)

In Illinois, residential property is assessed at 33.33% (one-third) of its fair market value. The assessor determines what your property would sell for in today's market, and only that percentage is used to calculate your taxes. For example, if your home's market value is $125,500 (the county median), at Illinois's 33.33% assessment ratio your assessed value would be $41,833 ($125,500 × 33.33%), resulting in approximately $2,632 in annual taxes at the county's effective rate of 2.10% before any exemptions are applied.

The Appeal Process

Appeals are heard by the Board of Review. The Board of Review will evaluate your written complaint and supporting evidence. They may schedule a hearing where you can present your case in person, explain why your assessment is incorrect, and respond to questions about your comparable sales or other evidence.

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Step 1: Contact your Township Assessor for an informal review of your assessment. Discuss the assessment directly with the assessor's office to determine how it was calculated and whether an error exists. This informal step may resolve the issue without filing a formal appeal.

2

Step 2: Obtain your property record card with the assessed valuation from the assessor's office. Review your property details carefully for errors in square footage, number of rooms, lot size, or other features that could affect your assessment.

3

Step 3: Determine the fair market value of your property and gather supporting evidence. Research comparable sales of similar properties in your neighborhood that sold recently, and collect documentation of any property condition issues.

4

Step 4: Obtain the appeal form by calling 815-434-8233 or 815-617-4200, or download it from lasallecountyil.gov. Complete the form in writing with an Affidavit of Affirmation. File within 30 days of your township's publication date or by the December 1, 2026 universal deadline.

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Step 5: Gather evidence to support your appeal, including comparable sales of similar properties, photographs showing property condition or defects, repair estimates for any issues, and documentation of errors in the property record. Prepare a clear argument for why your assessment is too high.

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Step 6: Submit your completed appeal form with all supporting evidence to the Board of Review. The Board will review your complaint and may schedule a hearing where you can present your case in person and answer questions about your evidence.

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Step 7: If the Board of Review's decision is unsatisfactory, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Board of Review's decision. This is a state-level administrative appeal.

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Step 8: As a final option, you may file a tax objection complaint in circuit court if you disagree with the PTAB decision. You must pay your taxes pending the outcome of any appeal.

Required form: Assessment Appeal Form or Form PTAX-230 (Non-farm Assessment Complaint)

Filing Methods

online:Download form from https://lasallecountyil.gov/DocumentCenter/View/159/Assessment-Appeal-Form-PDF
phone:Call 815-434-8233 or 815-617-4200 to request an appeal form
mail:Mail completed form to: LaSalle County Chief Assessment Officer, 707 East Etna Road, Room 262, Ottawa, IL 61350
in-person:Submit at LaSalle County Governmental Center, 707 East Etna Road, Room 262, Ottawa, IL 61350

Evidence to Bring

Comparable sales of similar properties in your area that sold recentlyPhotographs showing property condition, defects, or damageRepair estimates or contractor quotes for needed fixesDocumentation of errors in property record (incorrect square footage, features, etc.)Property record card from the assessor's officeProfessional appraisal (optional but helpful)

LaSalle County Assessor Contact

LaSalle County Chief Assessment Officer

Phone: 815-434-8233

Address: 707 East Etna Road, Room 262, Ottawa, IL 61350

Website: https://lasallecountyil.gov/194/Assessments

Online Portal: https://lasallecountysa.org/propertysearch/

Hours: 8:00 AM - 4:30 PM, Monday-Friday

Tax Exemptions in LaSalle County

General Homestead Exemption

$6,000 reduction in EAV

Reduces the equalized assessed value (EAV) of owner-occupied primary residences

Eligibility: Property must be your principal residence and you must be the owner or have a legal/equitable interest. Only one property per person can receive this exemption.Deadline: Initial application required; no annual renewal needed once approved

Senior Citizens Homestead Exemption

$5,000 reduction in EAV

Additional reduction for homeowners age 65 or older on top of the General Homestead Exemption

Eligibility: Property must be your principal residence and you must be 65 or older by December 31 of the tax assessment year. May also be available for cooperatives and qualified life-care facilities.Deadline: Must apply with County Assessment Office or township assessor; renewal forms mailed annually after initial approval

Low-Income Senior Citizens Assessment Freeze

Freezes EAV (not tax rate)

Freezes the property's EAV at the level when the senior first qualified, protecting against future assessment increases

Eligibility: Age 65+ by June 1 of application year, household income of $65,000 or less, and property must be principal residence. Must renew annually with income documentation.Deadline: Annual application required with Form PTAX-340

Homestead Exemption for Persons with Disabilities

$2,000 reduction in EAV

Reduces EAV for homeowners with qualifying disabilities under federal standards

Eligibility: Must be unable to engage in substantial gainful activity due to a medically determinable disability. Must provide Illinois Disabled Person Identification Card (Class 2) or Social Security disability documentation. Property must be principal residence.Deadline: Apply with County Assessment Office using Form PTAX-343

Disabled Veterans' Standard Homestead Exemption

Varies by disability rating (30% or higher service-connected disability required)

Exemption for veterans with service-connected disabilities

Eligibility: Must be Illinois resident who served in U.S. Armed Forces, have at least 30% service-connected disability certified by U.S. Department of Veterans Affairs, and occupy property as principal residence on January 1 of assessment year.Deadline: Apply with County Assessment Office; cannot be claimed in addition to Disabled Veterans' Exemption of $70,000

Homestead Improvement Exemption

Up to $25,000 in assessed value ($75,000 market value)

Exempts the increased assessed value from improvements or additions to your home

Eligibility: Available when you add improvements to your property that increase its assessment. Exemption continues for four years from the date the improvement is completed and occupied.Deadline: Contact assessor after improvement is completed

Returning Veterans' Homestead Exemption

$5,000 reduction in EAV for the tax year

One-time exemption for veterans returning from active duty in armed conflict

Eligibility: Available in the tax year the qualifying veteran returns from active duty in an armed conflict involving U.S. armed forces. Must own and occupy property as principal residence.Deadline: Apply with County Assessment Office for the applicable tax year

LaSalle County Appeal Statistics

Avg Reduction

$650

LaSalle County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in LaSalle County for 2026?
The appeal deadline in LaSalle County is 30 days from the publication date for your specific township, which typically occurs in late October. Each township publishes on different dates, so you must check when your township's assessment changes were published in the local newspaper. However, there is also a universal deadline of December 1, 2026 for all 2026 assessment appeals. After December 1, 2026, the Board of Review will no longer accept complaints for the 2026 assessment year but will begin accepting 2027 complaints for the 2028 tax year.
How do I file a property tax appeal in LaSalle County?
To file an appeal in LaSalle County, you must first obtain the Assessment Appeal Form by calling 815-434-8233 or downloading it from lasallecountyil.gov. Complete the form in writing with an Affidavit of Affirmation attesting to your complaint. Gather supporting evidence such as comparable sales, photos of your property, and documentation of any assessment errors. Submit your completed form with evidence to the LaSalle County Board of Review either by mail to 707 East Etna Road, Room 262, Ottawa, IL 61350, in person at the Governmental Center, or by downloading and mailing the form. You must file within 30 days of your township's publication date.
What is the General Homestead Exemption worth in LaSalle County?
The General Homestead Exemption in LaSalle County reduces your property's equalized assessed value (EAV) by $6,000. For a property with LaSalle County's effective tax rate of 2.10%, this exemption saves approximately $126 per year in property taxes. This exemption is available for all owner-occupied primary residences in LaSalle County. You must file an initial application with the County Assessment Office or your township assessor, but there is no annual renewal required once approved. Only one property per person can receive this exemption, and you must own and occupy the property as your principal residence as of January 1 of the tax year.
What evidence do I need to win a property tax appeal in LaSalle County?
The strongest evidence for a LaSalle County property tax appeal includes recent comparable sales of similar homes in your neighborhood, showing that homes like yours sold for less than your assessed market value. You should also provide photographs documenting any property condition issues, damage, or defects that reduce your home's value. Include repair estimates or contractor quotes for needed fixes. Review your property record card carefully and document any errors in square footage, lot size, number of rooms, or other features. The Board of Review needs clear evidence that your assessment exceeds 33.33% of your property's actual fair market value.
How much can I save by appealing my property taxes in LaSalle County?
In LaSalle County, a successful appeal results in average savings of $650 per year according to available data. However, your actual savings depend on how much your assessment is reduced. With LaSalle County's effective tax rate of 2.10%, every $10,000 reduction in your home's assessed market value saves you approximately $210 per year. If your home is overassessed by just 10% on the median home value of $125,500, you could be overpaying approximately $263 per year. The key is proving that your property's market value is lower than what the assessor determined, which directly reduces your assessed value and tax bill.
What happens at a Board of Review hearing in LaSalle County?
At a LaSalle County Board of Review hearing, you will have the opportunity to present your appeal case in person to the Board members. You should bring all your supporting evidence, including comparable sales data, photographs of your property, repair estimates, and your property record card. The Board will review your written complaint and ask questions about your evidence and why you believe your assessment is incorrect. You'll explain why your property's market value is lower than the assessor determined, using your comparable sales and other documentation to support your argument. The hearing is typically informal but quasi-judicial in nature. After reviewing all evidence, the Board will issue a written decision either granting a reduction, denying your appeal, or making a partial adjustment.
Can I appeal to the state if LaSalle County's Board of Review denies my appeal?
Yes, if the LaSalle County Board of Review denies your appeal or you disagree with their decision, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Board of Review's final decision. The PTAB is a state-level quasi-judicial body that provides an unbiased forum to contest property assessments. You must file your PTAB appeal within the 30-day window and include copies of the Board of Review's decision and all supporting evidence. If you're still unsatisfied after the PTAB decision, you can file a tax objection complaint in circuit court as a final option. Note that you must continue paying your property taxes while any appeal is pending.
What is the Senior Assessment Freeze worth in LaSalle County?
The Low-Income Senior Citizens Assessment Freeze in LaSalle County freezes your property's equalized assessed value (EAV) at the level when you first qualified, protecting you from future assessment increases as property values rise. For 2026, you must be age 65 or older and have a combined household income of $65,000 or less. In a rising real estate market like LaSalle County, this freeze can save thousands of dollars over time by preventing your EAV from increasing even as your neighbors' assessments go up. You must apply annually using Form PTAX-340 and provide income documentation. Note that the freeze applies to your EAV, not your tax rate, so your bill can still increase if local tax rates rise.

Official Resources

LaSalle County Assessor Website →

Official county assessment office with forms, exemption applications, and assessment information.

LaSalle County Property Search →

Search and view property assessments, tax information, and property records online.

Illinois Property Tax Appeal Board (PTAB) →

State-level appeals board for property tax disputes after Board of Review decisions.

Illinois Department of Revenue - Assessment Appeals →

State resource explaining the property tax appeal process and required forms for Illinois counties.

For state-wide appeal information including Illinois's assessment ratio and deadlines, see our Illinois Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

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← All Illinois property tax appeal info

Sources: https://lasallecountyil.gov/194/Assessments | https://lasallecountyil.gov/197/Assessment-Publications | https://lasallecountyil.gov/204/Exemptions | https://lasallecountyil.gov/788/Board-of-Review | https://www.tax-rates.org/illinois/lasalle_county_property_tax | https://www.appealdesk.com/appeals/illinois/lasalle | https://tax.illinois.gov/localgovernments/property/appeals.html | http://www.il-ccao.org/ccao/lasalle-county/

Last verified: 2026-07-24