AppealDesk

LaSalle County Property Tax Appeal — Illinois

Rob HartleyRob Hartley·Updated March 5, 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, 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

2026 Appeal Deadline: 30 days from publication date for your township, or December 1, 2025 for all 2025 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 2025 assessment appeals in LaSalle County is Monday, December 1, 2025. After this date, the Board of Review will no longer accept 2025 complaints but will accept 2026 complaints for the 2027 tax year.

Property in LaSalle County, Illinois — local tax assessment and appeal guide

How LaSalle County Assesses Property

33.33%of market value

Assessed by: LaSalle County Chief County Assessment Officer and Township Assessors

Assessment cycle: annual

Notices typically mailed: Spring, typically by 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), your assessed value would be $41,833 ($125,500 × 33.33%). At LaSalle County's effective tax rate of 2.10%, this would result in approximately $2,632 in annual property taxes before any exemptions are applied.

The Appeal Process

Appeals are heard by the Board of Review. After filing your appeal, the LaSalle County Board of Review will review your complaint and supporting evidence. You may be invited to attend a hearing to present your case in person, where you can explain why you believe your assessment is too high and present your evidence. The Board will make a decision and notify you by mail of the results.

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Step 1: Review your assessment notice carefully when it arrives in spring (typically by mid-May). Compare your assessed value to similar properties in your neighborhood using the county's property search tool.

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Step 2: Contact your Township Assessor first to discuss your assessment informally. The assessor may be able to resolve the issue without a formal appeal. Call the Supervisor of Assessment office at 815-434-8233 for Township Assessor contact information.

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Step 3: If not satisfied with the Township Assessor's review, file a formal complaint with the LaSalle County Board of Review. Obtain the appeal form by calling 815-617-4200 or downloading it from lasallecountyil.gov. File within 30 days of your township's publication date.

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Step 4: Gather evidence to support your appeal, including comparable sales of similar properties, photographs showing property condition, repair estimates for any defects, and documentation of errors in the property record (square footage, features, etc.).

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Step 5: 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.

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Step 6: 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.

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Step 7: As a final option, you may file a lawsuit in circuit court to challenge the assessment if the PTAB decision is unfavorable, though this option typically requires legal representation.

Required form: LaSalle County Real Estate Assessment Appeal Form (available at lasallecountyil.gov) or written complaint

Filing Methods

online:Download forms at lasallecountyil.gov/195/Applications-Forms
phone:Call Board of Review at 815-617-4200 for forms and information
mail:Mail to: LaSalle County Governmental Center, 707 Etna Rd., Room 262, Ottawa, IL 61350
in-person:Visit County Assessment Office at 707 Etna Rd., Room 262, Ottawa, IL 61350

Evidence to Bring

Comparable sales data showing recent sales prices of similar homes in your neighborhoodPhotographs documenting property condition, defects, or damageRepair estimates or contractor bids for needed repairsDocumentation of errors in property records (incorrect square footage, features, etc.)Independent appraisal if available

LaSalle County Assessor Contact

LaSalle County Chief County Assessment Officer

Phone: 815-434-8233

Address: LaSalle County Governmental Center, 707 Etna Road, Room 262, Ottawa, IL 61350

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

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

Hours: Monday, Tuesday, Wednesday & Friday: 9:00 AM to 12:00 PM and 1:00 PM to 3:00 PM

Tax Exemptions in LaSalle County

General Homestead Exemption

Up to $6,000 reduction in assessed value

Reduces the equalized assessed value (EAV) of your primary residence, resulting in lower property taxes. This is the most common exemption for homeowners.

Eligibility: Owner-occupied residential property used as primary residence. Owner must occupy the property and be liable for property taxes as of January 1 of the assessment year.Deadline: Apply anytime during the year; one-time application, no annual renewal required

Senior Citizen Homestead Exemption

$5,000 reduction in assessed value

Provides an additional reduction in assessed value for senior homeowners on top of the General Homestead Exemption.

Eligibility: Property owner must be 65 years of age or older by December 31 of the assessment year, own and occupy the property as their primary residence, and be liable for property taxes.Deadline: Apply anytime during the year you turn 65; annual renewal form mailed each January

Senior Citizen Assessment Freeze Homestead Exemption

Freezes assessed value at base year

Freezes the property's equalized assessed value at the base year level, preventing increases due to inflation. This does NOT freeze your taxes, only your assessment.

Eligibility: Must be 65 or older, owned and resided in property for 2 consecutive years, and have household income of $65,000 or less for 2025 (payable 2026). Income limits increase in future years per Public Act 104-0452.Deadline: Must file initially by deadlines set by county; annual renewal required each year

Homestead Exemption for Persons with Disabilities

$2,000 annual reduction in EAV

Provides an annual reduction in assessed value for homeowners with disabilities.

Eligibility: Person with disability must be owner of record or have legal/equitable interest, occupy property as primary residence, be liable for property taxes, and provide proof of disability.Deadline: File Form PTAX-343 with Chief County Assessment Office; must renew annually with Form PTAX-343-R

Standard Homestead Exemption for Veterans with Disabilities

$2,500 reduction for 30-49% disability; $5,000 for 50-69% disability; 100% exempt for 70-100% disability (if EAV under $250,000); complete exemption for WWII veterans regardless of disability

Reduces or eliminates property taxes for veterans with service-connected disabilities certified by the U.S. Department of Veterans Affairs.

Eligibility: Must be veteran with service-connected disability, own and occupy property as primary residence, and be liable for property taxes.Deadline: File Form PTAX-342 with County Assessment Office; annual renewal required

Returning Veterans' Homestead Exemption

$5,000 reduction in EAV for two years

Provides a temporary reduction for veterans returning from active duty in armed conflict.

Eligibility: Must be Illinois resident who served in U.S. Armed Forces, Illinois National Guard, or U.S. Reserve Forces, returning from active duty in armed conflict during the assessment year. Must own and occupy property as primary residence.Deadline: File Form PTAX-341 upon return from active duty

Homestead Improvement Exemption

Up to $75,000 in fair cash value ($25,000 in assessed value) of improvement

Reduces the assessment attributable to new residential improvements for four years from completion date.

Eligibility: Property must be principal residence with new improvements (addition, deck, garage, etc.) that increase property value. General maintenance does not qualify.Deadline: May be granted automatically by Township Assessor or application may be required

Official Resources

LaSalle County Assessor Website →

Official website of the LaSalle County Chief County Assessment Officer with information about assessments, exemptions, and the appeal process.

LaSalle County Property Search →

Search for property information, assessed values, and property characteristics for any parcel in LaSalle County.

Illinois Property Tax Appeal Board (PTAB) →

State-level appeal board for property tax disputes, providing forms, instructions, and information for appealing Board of Review decisions.

Illinois Department of Revenue - Property Tax Relief →

Comprehensive information about Illinois property tax exemptions, including homestead exemptions, senior citizen programs, and veterans benefits.

Check Your LaSalle County Assessment

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Frequently Asked Questions

What is the deadline to appeal my property taxes in LaSalle County for 2026?
For 2025 assessments (payable in 2026), the deadline to file an appeal varies by township but all appeals must be filed within 30 days of your township's publication date. Assessment notices are typically published in late October 2025 in local newspapers. The universal deadline for ALL 2025 assessment appeals in LaSalle County is Monday, December 1, 2025. After this date, the Board of Review will no longer accept 2025 complaints. It is critical to file your appeal on time, as missing the deadline means you must wait until the next assessment year.
How do I file a property tax appeal in LaSalle County?
To file a property tax appeal in LaSalle County, first contact your Township Assessor to discuss your assessment informally by calling the Supervisor of Assessment office at 815-434-8233. If you're not satisfied with the informal review, file a formal complaint with the LaSalle County Board of Review within 30 days of your township's publication date. You can obtain the appeal form by calling 815-617-4200 or downloading it from lasallecountyil.gov. Submit the completed form with supporting evidence such as comparable sales data, photographs, and repair estimates to the Board of Review at 707 Etna Road, Room 262, Ottawa, IL 61350.
What is the homestead exemption worth in LaSalle County?
The General Homestead Exemption in LaSalle County reduces your equalized assessed value by up to $6,000, which is the maximum amount for all Illinois counties except Cook County. For a property with the county's 2.10% effective tax rate, this exemption would save approximately $126 per year on your property tax bill. Senior citizens age 65 and older can receive an additional $5,000 reduction through the Senior Citizen Homestead Exemption, saving another $105 annually. These exemptions are applied automatically after your initial application and do not require annual renewal for the General Homestead Exemption.
How much can I save by appealing my property taxes in LaSalle County?
The amount you can save depends on how much your property is overassessed and whether your appeal is successful. With LaSalle County's 2.10% effective tax rate, every $1,000 reduction in your assessed value saves you approximately $21 per year in property taxes. If your home is overassessed by $10,000 in market value (which equals $3,333 in assessed value at the 33.33% ratio), a successful appeal could save you about $70 annually. Over several years, these savings add up significantly. Many homeowners in Illinois counties with high tax rates successfully reduce their assessments by thousands of dollars through the appeal process.
What evidence do I need for a LaSalle County property tax appeal?
To support your LaSalle County property tax appeal, you should gather comparable sales data showing recent sale prices of similar homes in your neighborhood, preferably from the past 6-12 months. Include photographs documenting any property defects, damage, or conditions that negatively affect value. Provide repair estimates from licensed contractors for any needed repairs, and review your property record card from the assessor's office to identify any errors in square footage, room count, or other features. An independent professional appraisal can be very helpful but is not required. The more thorough and well-documented your evidence, the better your chances of a successful appeal before the Board of Review.
When will I receive my assessment notice in LaSalle County?
In LaSalle County, assessment notices are typically mailed in the spring each year, generally reaching homeowners by the middle of May. These notices contain both the market value and assessed value of your property, along with an estimate of your property tax bill. Only taxpayers who have had an individual assessment change (beyond the township equalization multiplier) will receive an individual notice by mail. If your only change is the township multiplier for equalization purposes, your notification is provided through the township assessment heading published in local newspapers, typically in late October. You can also check your property information online year-round at lasallecountysa.org/propertysearch/.
Can I appeal my LaSalle County property taxes if I just bought my home?
Yes, you can appeal your property taxes even if you recently purchased your home, and your recent purchase price can actually be strong evidence for your appeal. If you bought your home for significantly less than the assessed value (adjusted for the 33.33% assessment ratio), this indicates your property may be overassessed. The recent sale price is considered a reliable indicator of market value. However, be aware that the assessor may adjust your assessment based on your purchase price in the following year. You must still meet the filing deadline of 30 days from your township's publication date, regardless of when you purchased the property. Contact the Board of Review at 815-617-4200 to obtain appeal forms and discuss your specific situation.
What happens after I file my appeal with the LaSalle County Board of Review?
After you file your property tax appeal with the LaSalle County Board of Review, the Board will review your complaint and all supporting evidence you submitted. The Board may schedule a hearing where you can present your case in person and answer any questions about your evidence. The hearing provides an opportunity to explain why you believe your assessment is incorrect and to present comparable sales data and other documentation. After reviewing your appeal, the Board will make a decision and notify you by mail of the results. If your appeal is successful, your assessed value will be reduced and you'll see lower property taxes. If you disagree with the Board's decision, you have the right to appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Board of Review's decision.

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/197/Assessment-Publications | https://lasallecountyil.gov/204/Exemptions | https://www.tax-rates.org/illinois/lasalle_county_property_tax | https://tax.illinois.gov/localgovernments/property/taxrelief.html | https://en.wikipedia.org/wiki/LaSalle_County,_Illinois

Last verified: 2026-03-05