To lower your property taxes in Lake County, IL, start by claiming every homestead exemption you qualify for, then challenge your assessment through the Lake County Board of Review if it exceeds what your home would actually sell for. Exemptions reduce the value that gets taxed; appeals reduce the value itself. Seniors who are house-rich but cash-poor have a third option: deferring the bill entirely through a state program. Which combination fits depends on your age, income, disability status, and whether your assessment reflects reality.
Claim Every Exemption You Qualify For
Exemptions are the simplest tool. Each one shaves a fixed dollar amount off your equalized assessed value before the tax rate is applied, and most renew automatically once approved. You can stack several if you qualify.
General Homestead Exemption
Any owner who occupies the property as a primary residence qualifies. In Lake County, this reduces equalized assessed value by up to $8,000, which is higher than the $6,000 available in most Illinois counties because Lake borders Cook.1Lake County, IL. General Homestead Exemption2Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-175 – General Homestead Exemption Apply for this one first.
Senior Citizens Homestead Exemption
Homeowners who turn 65 during or before the assessment year get an additional $8,000 reduction, stacked on top of the General Homestead Exemption. A qualifying senior can therefore remove up to $16,000 from assessed value.3Lake County, IL. Senior Homestead Exemption4Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
Senior Citizens Assessment Freeze
This one locks your assessed value at a base-year level, so rising neighborhood values don’t push your bill up. You must be 65 or older, occupy the home as your principal residence, and meet an income test. For the 2025 assessment year (taxes payable in 2026), the household income limit is $65,000. It rises to $75,000 for the 2026 assessment year, $77,000 for 2027, and $79,000 for 2028.5Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-172 – Senior Citizens Assessment Freeze Homestead Exemption File with the Chief County Assessment Officer by July 1 of each taxable year. The savings compound: the longer you hold the freeze in a rising market, the wider the gap between your frozen value and the current one.
Homestead Exemption for Persons with Disabilities
A $2,000 reduction in equalized assessed value, stackable with the General and Senior exemptions.6Lake County, IL. Homestead Exemption for Persons with Disabilities You qualify with a Class 2 Illinois Disability Identification Card, Social Security disability benefits, or a physician’s statement on Form PTAX-343-A.
Veterans with Disabilities Exemption
For veterans with a service-connected disability certified by the U.S. Department of Veterans Affairs, the exemption scales with the disability rating:7Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-169 – Homestead Exemption for Veterans With Disabilities
- 70% or higher: up to $250,000 in equalized assessed value is exempt. For most Lake County homes this effectively eliminates the property tax bill, though drainage districts and special service areas may still levy a charge.8Lake County, IL. Standard Homestead Exemption for Veterans With Disabilities
- 50% to 69%: $5,000 reduction.
- 30% to 49%: $2,500 reduction.
Applications must include current VA certification as of the date you file.
Returning Veterans Homestead Exemption
Veterans returning from active duty in an armed conflict get a $5,000 reduction covering two consecutive tax years: the year of return and the year after. The veteran must own and occupy the home as a principal residence on January 1 of each assessment year.9Illinois Department of Revenue. Property Tax Relief – Homestead Exemptions, PTELL, and Senior Citizens Real Estate Tax Deferral Program If you buy a home after January 1 of the return year, you become eligible the following tax year. File Form PTAX-341.
Home Improvement Exemption
If you add on or renovate, the resulting increase in assessed value can be partially sheltered. The exemption covers up to $75,000 in fair cash value of improvements, which translates to roughly $25,000 in assessed value at the one-third assessment level. It runs for four years from completion and occupancy, or until the next general reassessment, whichever comes later.10Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-180 – Homestead Improvements The same provision applies to rebuilding after fire, flood, or storm damage, provided the structure is rebuilt within two years. Arson qualifies only if the owner or resident did not cause the fire. For flood damage, the home must be in a jurisdiction participating in the National Flood Insurance Program.
A Word on Fraud
Every exemption application is signed under penalty of perjury. Claiming an exemption on a property you don’t live in, or misrepresenting your income on a Senior Freeze application, is a criminal offense under the Illinois Criminal Code.5Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-172 – Senior Citizens Assessment Freeze Homestead Exemption
Defer the Bill if You’re a Senior Short on Cash
If you’re 65 or older, the Senior Citizens Real Estate Tax Deferral Program lets you postpone paying property taxes rather than reduce them. The state pays the taxes for you, places a lien on the property, and charges 3% simple interest per year. The total deferred (taxes, interest, and lien fees) cannot exceed 80% of your equity. For the 2026 tax year, the household income limit is $77,000.11Illinois Department of Revenue. Senior Citizens Real Estate Tax Deferral Program Frequently Asked Questions Repayment comes due when the property is sold or the homeowner dies. This fits seniors who want to stay in their homes without the pressure of annual tax payments.
Appeal Your Assessment If the Value Is Too High
An exemption reduces the value that gets taxed. An appeal challenges whether that value is correct. Your township assessor sets the assessed value, which by law should equal one-third of fair market value, and the Chief County Assessment Officer then applies a township equalization multiplier. If your assessment exceeds what your home would actually sell for, a successful appeal lowers it for the current year and resets the baseline going forward. The next quadrennial reassessment is scheduled for 2027, so pay particularly close attention to notices that year.
The Lake County Board of Review considers three categories of appeals.12Lake County, IL. Appeal Process
Market Value
The most common argument: your assessed value exceeds what the home would sell for. A recent arm’s-length sale price is the strongest evidence. If you bought within the past year or two below the assessed value, that transaction speaks for itself. A professional appraisal dated close to January 1 of the assessment year also carries weight. Zillow estimates and gut feel do not.
Uniformity
Even if your assessment matches market value, you can argue your property is taxed disproportionately compared to similar nearby homes. Identify comparable properties in your area assessed at a lower rate per square foot or as a percentage of their sale price. Look for similar square footage, age, lot size, and condition in the same township.
Factual Errors
Sometimes the data behind the assessment is simply wrong: incorrect square footage, a finished basement that doesn’t exist, an extra bathroom that was never built. Pull your property record card from the assessor’s website and compare it room by room against the actual home. This is often the easiest appeal because the correction is objective.
Damage Reassessment
If your home becomes uninhabitable from fire, flood, storm, or another sudden event, you’re entitled to a proportionate reduction in assessed value for the period the home is unfit for occupancy. File within 90 days of the destruction.13Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/9-180 – Pro-Rata Valuations Miss that window and you forfeit the reduction. The reduction is calculated on a daily basis, so the sooner you file, the more of the tax year you capture. Owner-caused damage does not qualify.
How and When to File
You have 30 days from the date your township’s assessment roll is published to file your appeal. The deadline is printed on your assessment notice, so hold onto it.14Lake County Board of Review. 2025 Rules of the Lake County Board of Review Appeals must be filed electronically through the SmartFile e-filing portal; paper filings are not accepted.15Lake County, IL. Online Appeal Filing
You’ll need your 10-digit Property Index Number from your tax bill or assessment notice. For a market-value appeal, build a grid of comparable properties and attach your closing disclosure or a certified appraisal as of January 1. For a uniformity appeal, gather assessed values, square footage, and sale prices for your comparables. Check that the legal description and owner of record on the complaint form are correct, because errors cause processing delays.
After the filing period closes, the Board schedules a hearing where you present your case. A written decision follows by mail. While the appeal is pending, the existing assessment stays in effect and you pay taxes on that amount.
If the Board of Review Says No
You have two escalation paths, and you cannot pursue both for the same tax year. The usual next step is the Illinois Property Tax Appeal Board, a state-level body that reviews your assessment independently.16Illinois Property Tax Appeal Board. Property Tax Appeal Board File within 30 days of the date the Board of Review mails its written decision.17Illinois Property Tax Appeal Board. PTAB Practice and Procedures Most residential appeals go through PTAB’s e-filing portal.18Illinois Property Tax Appeal Board. PTAB Forms and Brochures You’ll submit the Board of Review’s final determination, your original evidence, and PTAB’s residential appeal form.
PTAB has authority over the assessment only. It cannot review your tax rate, grant exemptions, or change your bill directly. You continue paying taxes on the existing assessment while the case is pending. The alternative is filing directly in circuit court, which is more expensive and typically warrants an attorney.