Cook County, Illinois • Homestead exemption guide • 2026 update
Cook County IL Homestead Exemption: Rules, Savings, Deadline, Filing Steps and Local Offices
The Cook County homestead exemption helps lower the property tax bill on a home you own and occupy as your principal residence.
In Cook County, most homeowner exemptions reduce Equalized Assessed Value, also called EAV. The exemption amount is not the same as the final dollar savings.
For the 2026 bill cycle, Cook County applications submitted after May 15, 2026 are generally processed as a Certificate of Error.
The Cook County Assessor handles exemption applications and property values. The Treasurer handles bills, payments and refunds.
Fast answer
Cook County Homestead Exemption Quick Facts
Use this office for exemptions, property details, EAV, missing exemptions and first-level assessment review.
Late filings can still redeem missing savings, but they are handled through the Certificate of Error process.
For owner-occupied principal residences that meet Cook County requirements.
For qualifying homeowners age 65 or older. It automatically renews after approval.
Freezes eligible EAV, not the whole tax bill. Income and prior-year occupancy rules apply.
For qualifying homeowners with disabilities. Cook County notes automatic renewal under new state law.
For eligible veterans returning from active duty in armed conflict. This must be filed annually.
Cook County exemptions generally appear on the second-installment bill or on an adjusted bill.
Exemption or value problem → Assessor. Tax bill, payment or refund problem → Treasurer. Tax rate, PIN or tax code problem → County Clerk. Value appeal after Assessor review → Board of Review.
Local contacts
Cook County Offices, Addresses, Phone Numbers and Roles
Cook County Assessor
Use for: homeowner exemptions, senior exemptions, Senior Freeze, disability, veteran exemptions, property details, PIN search and first-level assessment review.
Assessor: Fritz Kaegi
Main office: 118 N. Clark Street, Room 320, Chicago, IL 60602
Phone: 312-443-7550
Downtown hours: 8:30 a.m.–5:00 p.m.
Open Assessor WebsiteCook County Treasurer
Use for: tax bills, payments, duplicate bills, payment status, overpayment refunds, certificate-of-error refunds and tax-sale questions.
Treasurer: Maria Pappas
Main office: 118 N. Clark Street, Room 112, Chicago, IL 60602
Phone: 312-443-5100
Open Treasurer WebsiteCook County Clerk
Use for: tax rates, tax codes, permanent real estate index numbers, tax maps and recorded property-tax-related records.
Clerk: Monica Gordon
Main office: 69 W. Washington Street, Chicago, IL 60602
Phone: 312-603-5656
Tax rate questions: 312-603-6566
Open County Clerk WebsiteCook County Board of Review
Use for: second-level assessment appeals after the Assessor’s review window or when the township is open for Board of Review appeals.
Commissioners: George A. Cardenas, Samantha Steele and Larry R. Rogers, Jr.
Main office: 118 N. Clark Street, Chicago, IL 60602
Phone: 312-603-5542
Public hours: Monday–Friday, 9:00 a.m.–5:00 p.m.
Open Board of ReviewOpen Cook County Assessor branch office addresses
Downtown: 118 N. Clark Street, Room 320, Chicago, IL 60602 • 312-443-7550 • 8:30 a.m.–5:00 p.m.
Markham: 16501 S. Kedzie Ave., Room 237, Markham, IL 60426 • 312-443-7550 • 8:30 a.m.–4:30 p.m.
Skokie: 5600 W. Old Orchard Rd., Room 149, Skokie, IL 60077 • 312-443-7550 • 8:30 a.m.–4:30 p.m.
Bridgeview: 10200 S. 76th Avenue, Room 237, Bridgeview, IL 60455 • 312-443-7550 • 8:30 a.m.–4:30 p.m.
Cook County recommends scheduling an appointment before visiting in person.
Cook County Assessor main office map
118 N. Clark Street, Room 320, Chicago, IL 60602
This is the main office for exemption help, property details and assessment review.
For bills and refunds, use the Treasurer at Room 112 in the same building.
Content gaps fixed
Details Most Cook County Homestead Guides Miss
Tax year vs. bill year: Cook County property taxes are commonly paid the year after the tax year, so a “2026 bill” may involve tax year 2025 exemptions.
May 15 filing line: Cook County says applications after May 15, 2026 are processed as Certificate of Error filings.
EAV is the key value: exemptions reduce Equalized Assessed Value, not the full market value and not dollar-for-dollar tax.
Senior Freeze is not a bill freeze: it freezes eligible EAV, but tax rates can still change the bill.
Some exemptions auto-renew: Homeowner and Senior renew automatically after approval, but Senior Freeze and Returning Veterans must be filed annually.
PIN matters: the 14-digit Property Index Number is the fastest way to apply, check status, pay bills or locate exemption history.
Co-op owners have special filing: cooperative property owners cannot always use the normal online filing process.
Township timing matters: Cook County assessment and appeal windows can depend on the township or triad schedule.
Filing workflow
How to Apply for the Cook County Homestead Exemption
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Find your 14-digit PIN.
Use the Assessor address search or Cook County Property Tax Portal.
Open Assessor Address SearchAfter opening: enter house number, street name and city. Do not add street suffixes like Ave., St. or Pl. unless the tool asks for them. -
Check current exemption history first.
Open Property Details and review the Exemption History and Status area.
Open Cook County Property Tax PortalAfter opening: search by PIN or property address, open the property overview and review exemptions, payments, refunds and tax bill history. -
Choose the correct exemption category.
Start with Homeowner Exemption, then add Senior, Senior Freeze, disability, veteran or Long-Time Homeowner only if you qualify.
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Apply through Cook County’s filing portal.
The online application covers Homeowner, Senior, Senior Freeze, Persons with Disabilities, Returning Veterans and Veterans with Disabilities exemptions.
Open Cook County Exemption FilingAfter opening: click Begin Filing, select the exemption type, enter your PIN, upload proof, submit and save the confirmation. -
Watch the May 15 deadline.
Applications received after May 15, 2026 are processed as Certificate of Error filings.
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Check the second-installment bill.
Approved exemptions usually show on the second installment bill or an adjusted bill mailed later.
Do not stop. Cook County’s Certificate of Error process can help redeem missing exemptions for qualifying prior years or current-year corrections.
Savings math
How Cook County Homestead Savings Are Calculated
Cook County residential property is commonly assessed at 10% of estimated fair market value.
That assessed value is multiplied by the state equalizer to produce Equalized Assessed Value, or EAV.
Exemptions reduce EAV. The tax savings estimate is usually the exemption amount multiplied by the local tax rate.
Open simple EAV savings calculator
Estimated savings: $800.00
Exemption types
Cook County Homestead Exemption Types and Savings
Homeowner Exemption
Reduces EAV by $10,000.
Available to most owners who occupy the property as their principal place of residence.
It automatically renews after approval while eligibility continues.
Senior Exemption
Reduces EAV by $8,000.
For qualifying homeowners age 65 or older who own or are liable for taxes and occupy the home.
It automatically renews after approval.
Low-Income Senior Freeze
Freezes eligible EAV at a base-year level.
For the 2026 filing cycle, Cook County listed a $65,000 or less total household income test using the 2024 calendar year.
This exemption must be filed every year.
Persons with Disabilities Exemption
Reduces EAV by $2,000.
For homeowners who are disabled or became disabled during the tax year.
Cook County notes this exemption now automatically renews because of state legislation.
Returning Veterans Exemption
Reduces EAV by $5,000.
For eligible veterans returning from active duty in armed conflict for each qualifying tax year.
This exemption must be filed annually.
Veterans with Disabilities Exemption
Provides EAV reductions based on VA-certified service-connected disability level.
30%–49% may receive $2,500, 50%–69% may receive $5,000, and 70% or more can receive up to a $250,000 EAV reduction.
This exemption must be filed annually.
World War II Veterans Exemption
Cook County describes a WWII veterans exemption beginning in tax year 2024.
It applies to qualifying veterans who served during the statutory World War II period.
Cook County lists automatic renewal for this exemption.
Long-Time Homeowner Exemption
Only a small share of Cook County homeowners qualify.
Eligibility depends on income, length of residence and a significant assessment increase.
Cook County mails applications to properties it identifies as potentially eligible.
Documents
Documents to Prepare Before Filing
14-digit PIN: found through the Assessor, tax bill or Cook County Property Tax Portal.
Photo ID matching the property: Illinois driver’s license, Illinois ID, matrícula consular or City of Chicago ID may verify identity and occupancy.
If ID address does not match: prepare a separate identity document, an occupancy document and the online Occupancy Affidavit.
Occupancy proof: bank statement, landline/cable/internet bill, pay stub, Social Security award letter or voting record can help prove occupancy.
Tax-liability proof: recorded deed may be verified by Assessor staff, but unrecorded deed, contract for deed, lease, trust agreement, stock certificate or occupancy agreement may be needed.
Senior proof: proof of age and occupancy is needed for first-time Senior Exemption filings.
Senior Freeze proof: household income verification or proof of qualifying program enrollment may be needed.
Veteran or disability proof: submit the official VA, military, disability or government-agency document requested by the application.
After filing
How to Check Cook County Homestead Exemption Status
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Check your online filing status.
Use the application status link if you filed online.
Open Filing Status PortalAfter opening: sign in or use the application status path, choose the tax year and confirm the filing was submitted. -
Search Property Details.
Open the Assessor property page and review the Exemption History and Status area.
Search by AddressAfter opening: enter only the requested address fields, open the correct PIN and look for the exemption year and status. -
Use the Treasurer / Property Tax Portal.
Review bill history, payment status, refunds and exemption history.
Open Cook County Property Tax PortalAfter opening: search by PIN or address, then use the property overview to compare exemptions and bills. -
Check the second-installment bill.
Cook County says exemptions appear on the second installment bill or on an adjusted bill after approval.
File or ask about a Certificate of Error. For an approved Certificate of Error refund, contact the Treasurer for refund timing.
Exemption vs. appeal
What If Your Cook County Value Is Too High?
A homestead exemption and an assessment appeal solve different problems.
Use the exemption application if the home should receive homeowner, senior, freeze, disability or veteran savings.
Use an appeal if the assessed value, classification, property characteristics or comparable evidence is wrong.
Assessor review
First-level assessment review is handled by the Cook County Assessor during the township filing window.
Open Assessor AppealsBoard of Review appeal
The Board of Review is the next appeal path and has separate township windows and filing rules.
Open Residential AppealsLocal help
Township Assessor Help Outside Chicago
Township assessors are separate local offices, but Cook County says homeowners can visit a local township assessor for assistance.
Your property detail page lists the township. This matters for reassessment timing, appeal windows and local help.
Avoid delays
Common Cook County Homestead Exemption Mistakes
Confusing EAV with market value: the exemption reduces EAV, not the full estimated market value.
Thinking Senior Freeze freezes the bill: tax rates can change, so the bill can still change.
Missing annual filings: Senior Freeze, Returning Veterans and Veterans with Disabilities require annual filing.
Ignoring Certificate of Error: missing exemptions may still be recoverable through the Cook County correction process.
Using the wrong office: the Treasurer cannot approve your exemption, and the Assessor does not collect your tax payment.
Not checking the second installment: exemptions usually show there, not always on the first installment.
Not verifying co-op rules: cooperative owners may need the special co-op application route.
Missing township windows: value appeal timing can depend on township reassessment or appeal windows.
Important caution
Independent Information, Tax Caution and Property-Records Notice
This page is independent informational content for Cook County homeowners.
It is not the official website of the Cook County Assessor, Treasurer, Clerk, Board of Review, Illinois Department of Revenue or any government agency.
It is not legal advice, tax advice, an official tax bill, an assessment notice, an appeal decision or an exemption determination.
Verify current deadlines, forms, exemption amounts, documents, township windows, tax rates and office hours directly with official sources.
Property records should be used only for property-tax, appraisal, ownership-reference and public-record purposes.
Do not use property-record information for employment screening, tenant screening, credit, insurance or any FCRA-regulated purpose.
FAQs
Cook County Homestead Exemption FAQs
What is the Cook County Homeowner Exemption?
The Homeowner Exemption reduces the Equalized Assessed Value of an eligible owner-occupied principal residence by $10,000.
What was the Cook County homestead exemption deadline for the 2026 bill cycle?
Cook County says applications submitted after May 15, 2026 are processed as Certificate of Error filings.
Where do I apply for Cook County homestead exemption?
Apply through the Cook County Assessor’s online exemption filing portal or use the Assessor’s paper and mail options when available.
Does the Homeowner Exemption renew automatically?
Yes. Once the Cook County Homeowner Exemption is applied, the Assessor’s Office lists it as automatically renewing each year while eligibility continues.
How much is the Cook County Senior Exemption?
The Senior Exemption reduces Equalized Assessed Value by $8,000 for eligible homeowners age 65 or older.
Does the Cook County Senior Freeze freeze the tax bill?
No. The Senior Freeze freezes eligible EAV, not the entire tax bill. Tax rates can still change the amount due.
What income limit applies to the Cook County Senior Freeze filing cycle?
For the 2026 filing cycle described by Cook County, the Senior Freeze used a total household income limit of $65,000 or less for the 2024 calendar year.
How do I check if an exemption is already on my Cook County property?
Search your property by PIN or address, open Property Details, and review the Exemption History and Status section.
What is a Cook County Certificate of Error?
A Certificate of Error is the correction process used to redeem missing exemptions or correct prior tax-year exemption problems when the regular filing period has passed.
Who do I call if my exemption is approved but my bill or refund is still wrong?
Call the Cook County Treasurer for bill, payment or refund issues after confirming the Assessor record shows the approved exemption.
Official links