Search McHenry County IL Assessments, PINs, Tax Bills, GIS Parcels and Deeds
McHenry County does not operate like a single traditional county assessor system. Local township assessors perform much of the first-level valuation work, while the McHenry County Office of Assessments—led by Chief County Assessment Officer Alejandro Benitez—reviews township rolls, applies equalization, administers exemptions, maintains parcel records and manages the countywide Board of Review appeal process.
This 2026 guide connects that assessment system with the county’s Property Tax Inquiry portal, Athena GIS map, Treasurer tax bills, Recorder land records and township-specific appeal deadlines. It also explains why a 2026 assessment affects taxes payable in 2027, why a tax bill paid in 2026 is based on the 2025 assessment year, and which office to contact when the issue is value, exemption, rate, bill, deed or delinquency.
Search by 10-digit PIN, property address or owner
2026 notices are being published township by township
Second 2025 tax installment is due September 9, 2026
Senior Freeze income limit rises to $75,000 for 2026
What McHenry County Property Owners Need to Know Right Now
The 2026 assessment cycle is being released township by township. Publication of each township’s assessment roll starts a separate 30-day complaint period, so there is no single countywide appeal deadline.
CLOSEDRichmond Township
Published July 7, 2026
Aug. 6
The regular 2026 complaint deadline passed at midnight on August 6.
OPEN NOWChemung Township
Published July 14, 2026
Aug. 13
File the 2026 assessment complaint by midnight Thursday, August 13.
OPEN NOWDorr Township
Published July 22, 2026
Aug. 21
File the 2026 assessment complaint by midnight Friday, August 21.
Other McHenry County townships: as of August 7, the county’s 2026 publication table has not yet posted final publication data for Alden, Hebron, Burton, Dunham, Hartland, Greenwood, McHenry, Marengo, Seneca, Nunda, Riley, Coral, Grafton and Algonquin. Watch the live county publication page rather than guessing the deadline.
2026 assessment notice
Used for the 2026 assessment year and property taxes generally payable in 2027.
2025 tax bill
Mailed in May 2026 and payable in two installments during 2026.
Next 2026 tax deadline
Second installment of the 2025 tax bill is due September 9, 2026.
Office routing
Township Assessor vs. County Assessments vs. Treasurer
Township Assessor
Initial property valuation
Fair cash value
Building characteristics
Property-class questions
Local comparables
First informal value discussion
Sales used in valuation
Township property record cards
County Office of Assessments
Countywide assessment oversight
Equalization factors
Homestead exemptions
Senior Freeze
Board of Review complaints
PIN maintenance
Parcel changes and mapping
County assessment notices
Treasurer / Clerk / Recorder
Treasurer = bill and payment
County Clerk = tax rates
County Clerk = tax redemption after sale
Recorder = deeds and mortgages
Recorder = liens and releases
GIS = Athena parcel map
Tax sale status
Recorded-document research
A high tax bill is not automatically an assessment problem. Assessment value, exemptions and tax rates are controlled by different parts of the Illinois property-tax system.
Different from a Florida Property Appraiser: Illinois uses township assessors, county equalization and a separate Board of Review process. Compare that structure with the Volusia County Property Appraiser guide.
Choose the McHenry County Property Task You Need
Find a PIN or property record
Search the county Property Tax Inquiry portal using the 10-digit PIN, owner or a simplified property address.
View the 2026 assessment notice
Open your property and select Property Assessment Notice after your township has been published.
Check parcel map and sales
Use Athena to confirm the parcel, assessed value, ownership context and recorded sales.
Challenge an assessment
Find your township publication date, calculate the 30-day deadline and file through the Board of Review.
Verify exemptions
Check General Homestead, Senior, Senior Freeze, Disability and veteran exemptions before judging the tax bill.
Search tax bill or deed
Use the Treasurer for taxes and the Recorder’s separate land-record search for deeds, mortgages and liens.
Jump to the Exact Property Task
Countywide search workflow
How to Search McHenry County Property Assessment Records
Use the 10-digit Parcel Index Number when available.
For the 2026 assessment notice, the county says to use the 10 PIN digits and ignore extra trailing numbers such as 0040, 0030 or 0060.
Simplify address searches.
Use the house number and main street name first. The county warns that adding Avenue, Drive, directional letters and other extra address text can cause poor matches.
Open the correct tax year.
The same portal contains both assessment and tax-bill information. Change the year before comparing values.
Confirm the township.
Your township determines the local assessor and your 2026 assessment-publication deadline.
Read fair cash value and assessed value separately.
In Illinois, ordinary real property is targeted to an assessed level of 33⅓% of fair cash value before equalization and exemptions.
Check exemption lines.
Missing exemptions can materially increase taxable EAV even when the underlying assessment is correct.
Save the PIN.
Reuse it for Athena GIS, Treasurer tax lookup, Board of Review complaints and Recorder searches.
Major 2026 process change
McHenry County Assessment Notices Are Moving Online
Starting with the 2026 assessment cycle, properties receiving only an equalization-factor adjustment generally will not receive a mailed assessment notice. The notice is still generated, but it is posted in the county Property Tax Inquiry portal.
Online-only in many cases
Equalization-only assessment notices are posted online instead of mailed.
Still mailed
The county says notices are still mailed for revaluations, farmland and new properties.
Appeal clock still runs
The township publication date begins the 30-day complaint window whether or not you receive paper mail.
Find your 2026 notice
Search the property in Devnet Wedge.
Use PIN or a simplified street address.
Desktop users:
choose the Property Assessment Notice link in the right-side menu.
Phone or tablet users:
open the three-line menu and select Property Assessment Notice.
Confirm that the notice says 2026.
The 2026 notice relates to taxes generally payable in 2027.
Write down the publication and complaint dates.
Do not calculate the deadline from the day you personally opened the notice.
Township assessors perform much of the property-level appraisal work, while the county Assessment Office reviews and equalizes the rolls.
North / WestChemung Alden Hebron Richmond
Central NorthBurton Dunham Hartland Greenwood
CentralMcHenry Marengo Seneca Dorr
South / EastNunda Riley Coral Grafton Algonquin
Why township matters: assessment publications do not all occur on the same date. Your township’s publication date controls your ordinary 30-day Board of Review complaint window.
Fair Cash Value
Township assessor’s estimate of market value.
Think “probable sale price in an open market.”
Assessed Value
Target is approximately 33⅓% of fair cash value.
This is not the final taxable value.
Equalization
Township and state factors can adjust assessment levels.
Designed to maintain statutory assessment uniformity.
Exemptions
Homestead and other deductions reduce EAV.
Eligibility is managed through the Assessment Office.
Tax Rate
County Clerk extends rates from taxing-body levies.
Treasurer then bills and collects the tax.
Do not divide the tax bill by market value and assume that percentage is the “assessment rate.” Illinois first assesses value near one-third of fair cash value, applies equalization and exemptions, and then applies the combined tax rate to taxable EAV.
Interactive estimate
McHenry County EAV and Property Tax Estimator
Use this as a planning tool only. Enter estimated fair cash value, exemptions and the combined property-tax rate from the appropriate tax code.
Estimated assessment
—
Taxable EAV after exemptions
—
Estimated annual tax
—
The calculation uses one-third of market value as a simplified assessment estimate. Actual McHenry County taxes can differ because of township equalization, state multiplier, exemptions, farmland or special assessment treatment, Board of Review changes, tax-code differences and final levies.
Township-specific deadline
How to File a McHenry County Assessment Complaint in 2026
The ordinary complaint window lasts 30 days from your township’s assessment publication date. Start with the township assessor before filing when time allows, but do not let informal discussions cause you to miss the formal deadline.
Open the 2026 assessment notice.
Confirm the township, PIN, assessed value, equalized assessment and exemptions.
Contact the township assessor.
Ask how the value was developed and whether a factual error or informal correction can resolve the issue.
Choose the basis of complaint.
Common grounds include overvaluation, comparable-assessment inequity, incorrect property facts or legal issues.
Calculate your requested value.
Do not merely state that taxes are high. Identify the assessment or market value you believe is correct.
Prepare at least three useful comparables when using comparable evidence.
McHenry County’s 2026 Board rules call for characteristics of the subject and at least three comparable properties on the comparison grid.
Use January 1, 2026 valuation evidence.
For a fair-cash-value complaint, the county’s 2026 rules focus on proving the property’s value as of January 1, 2026.
File before your township’s midnight deadline.
Chemung closes August 13 and Dorr closes August 21. Other township dates will be published separately.
Track the complaint and assessor response.
The county provides an online complaint data search; year and PIN are usually the best lookup fields.
Evidence checklist
2026 assessment notice
10-digit PIN
Property photographs
Recent comparable sales
Comparable assessments
Professional appraisal when available
Repair / condition evidence
Building-size or property-card corrections
Appeal the assessment, not the tax bill. Your 2026 assessment complaint affects the 2026 assessment year, generally payable through the 2027 tax bill.
McHenry County Homestead and Property Tax Exemptions
Exemptions reduce Equalized Assessed Value rather than directly subtracting the same dollar amount from your tax bill.
General Homestead
Up to $8,000 EAV
Senior Citizens Homestead
$5,000 EAV
Persons with Disabilities
$2,000 EAV
Disabled Veteran 30–49%
$2,500 EAV
Disabled Veteran 50–69%
$5,000 EAV
70%+ disabled veteran
Qualifying residential property can receive a substantially larger exemption under Illinois law; McHenry County’s 2026 form explains applicable EAV limitations and restrictions.
Returning Veteran
Illinois provides a temporary Returning Veterans’ Homestead Exemption for qualifying service members.
Home Improvement
Qualifying improvements to an existing homestead can receive temporary exemption treatment under Illinois law.
Missing exemption? McHenry County tells property owners to contact the Assessment Office at 815-334-4290 or assessments@mchenrycountyil.gov rather than filing a value complaint simply because an exemption is absent.
Major 2026 law change
McHenry County Senior Assessment Freeze Income Limit Is Now $75,000
Illinois Public Act 104-0452 increased the maximum household-income limit for the Low-Income Senior Citizens Assessment Freeze Homestead Exemption beginning with the 2026 assessment year.
2025 tax year
$65,000 maximum household income
Payable in 2026.
2026 tax year
$75,000 maximum household income
Payable in 2027.
2027 tax year
$77,000 maximum household income
Payable in 2028.
2028 tax year
$79,000 maximum household income
Payable in 2029.
2026 filing deadline passed: McHenry County’s 2026 Senior Freeze application was due July 1, 2026.
Age
Applicant generally must be 65 or older during the assessment year.
Residence
The property must satisfy the ownership, principal-residence and tax-liability rules stated on PTAX-340.
Freeze is not a tax freeze
Tax rates and new improvements can still cause the actual tax bill to rise.
What Happens When McHenry County Property Taxes Are Late?
Before tax sale
Current delinquent taxes remain with the Treasurer / County Collector.
Late penalty
State law adds 1.5% for each month or part of a month until tax sale.
Certified notice
The Treasurer sends notice before delinquent taxes proceed to sale.
After tax sale
Redemption moves to the McHenry County Clerk rather than the Treasurer.
Redemption amount
Request a current Estimate of Redemption from the County Clerk.
Tax buyer lien
Tax sale does not mean the bidder immediately becomes owner; a statutory redemption process follows.
Do not mail an old amount after certified tax-sale notices are issued. The Treasurer warns that postmark treatment changes after the certified-letter stage and outdated payments can be returned.
Search McHenry County Deeds, Mortgages, Liens and Recorded Documents
MCHENRY LAND RECORD
DEED
MORTGAGE
LIEN
PLAT
The McHenry County Recorder maintains real-estate documents and offers a free web search plus paid Tapestry and Laredo options for document access.
Open the Recorder’s Public Records Search Options page.
Choose Free Web Search for ordinary index research.
Search by the strongest information available.
The free service supports several routes including name, PIN and address.
Confirm recording date and parties.
A tax or assessment owner field is not a substitute for the actual deed.
Use Tapestry when you need a copy online.
The Recorder directs non-subscribers to Tapestry for pay-as-you-go document access.
Use Laredo for professional high-volume research.
It supports expanded searches including party name, document number, recording date, document type, parcel, subdivision, address and associated documents.
McHenry County Assessment, Treasurer, Recorder and GIS Contacts
Office of Assessments
Alejandro Benitez
667 Ware Rd., Room 106
Woodstock, IL 60098 815-334-4290
Treasurer
Donna M. Kurtz
2100 N. Seminary Ave.
Woodstock, IL 60098 815-334-4260
Recorder
Joseph J. Tirio
667 Ware Rd., Room 109
Woodstock, IL 60098 815-334-4110
GIS
667 Ware Rd., Suite 206
Woodstock, IL 60098 815-334-4496
gis@mchenrycountyil.gov
Assessment Office hours: the county lists 8:00 a.m.–4:30 p.m., Monday through Friday, for records inspection and assessment-office services.
McHenry County Property Search Problems and Fixes
Problem
Practical fix
Correct office / tool
Full PIN does not work
Use the 10 core PIN digits and omit extra trailing codes such as 0040 or 0030.
Property Tax Inquiry
Address search fails
Use house number plus main street name; remove Ave, Drive, N, E and other extra address text.
Property Tax Inquiry
No paper assessment notice arrived
Check online; equalization-only notices are no longer mailed beginning in 2026.
Assessment Notice Portal
Not sure whether appeal window opened
Check the township publication table. The 30-day clock begins with township publication.
Office of Assessments
Richmond appeal missed
The regular 2026 deadline passed August 6; contact the Assessment Office promptly to ask whether any statutory correction route applies.
Office of Assessments
Assessment looks high but tax bill is 2025
Do not mix years: 2025 taxes are payable in 2026; a 2026 assessment ordinarily affects taxes payable in 2027.
Assessor / Treasurer
Exemption missing
Contact the County Assessment Office rather than challenging fair market value solely because the exemption line is absent.
Assessments
Senior Freeze rejected by income
For the 2026 assessment year, the maximum household income increased to $75,000 using 2025 household income.
Assessments
Only one building shows online
Contact the township assessor or Assessment Office; county notices warn that multiple improvements may not all display in every web view.
Township Assessor
Tax rate looks wrong
Use the County Clerk’s Tax Extension division; township assessors do not set levy rates.
County Clerk
Need exact parcel boundary
Do not use Athena as a legal survey. Check recorded plats and hire a licensed surveyor when boundary precision matters.
GIS / Recorder
Second installment not paid
Pay by September 9, 2026; late amounts accrue 1.5% per month or part of a month.
Treasurer
Taxes already sold
Request an Estimate of Redemption from the County Clerk instead of sending payment to the Treasurer.
County Clerk
Need deed image or lien
Use Recorder Free Web Search to identify the document, then use Tapestry or contact the Recorder for copies.
Recorder
“I am reviewing McHenry County PIN __________ in __________ Township for assessment year 2026. The Property Tax Inquiry portal shows fair cash value __________, assessed/EAV __________ and exemptions __________. I believe the issue is __________. Please confirm whether I should work with the township assessor, County Assessment Office, Treasurer, Clerk or Recorder, and tell me the deadline that applies.”
McHenry County uses township assessors for much of the initial property valuation work rather than one elected county assessor. Alejandro Benitez is the Chief County Assessment Officer and Supervisor of Assessments for the McHenry County Office of Assessments, which oversees countywide assessment administration, equalization, exemptions, parcel maintenance and the Board of Review process.
2. How do I search McHenry County property assessment records?
Use the McHenry County Property Tax Inquiry portal at mchenryil.devnetwedge.com. The most precise search uses the 10-digit Property Index Number. The county also provides address and other property-search options, and recommends using only the house number and main street name when an address search is too specific.
3. Why did I not receive a McHenry County assessment notice in the mail in 2026?
Starting with the 2026 assessment cycle, McHenry County stopped mailing notices to properties that are only adjusted by an equalization factor. Those notices are posted online in the Property Tax Inquiry portal. The county still mails notices for revaluations, farmland and new properties.
4. When is the McHenry County 2026 assessment appeal deadline?
There is no single countywide deadline. Each township receives a 30-day complaint period after its assessment publication. Richmond Township’s deadline was August 6, 2026, Chemung Township’s deadline is August 13, and Dorr Township’s deadline is August 21. Other township dates are published as their assessment rolls are completed.
5. What percentage of market value is property assessed at in McHenry County?
Illinois real property is generally targeted for assessment at 33⅓% of fair cash value. Township and state equalization factors can be applied to bring assessment levels toward that statutory standard before exemptions and tax rates are applied.
6. What changed for the McHenry County Senior Assessment Freeze in 2026?
The maximum household-income limit increased to $75,000 for the 2026 assessment year, using 2025 household income. The 2026 McHenry County Senior Freeze application was due July 1, 2026. A qualifying freeze limits EAV growth but does not guarantee that the actual property-tax bill will remain unchanged.
7. When are McHenry County property taxes due in 2026?
The 2025 property tax bill is payable in 2026 in two installments. The first installment was due June 9, 2026, and the second installment is due September 9, 2026.
8. What does McHenry County charge to pay property taxes online?
McHenry County says online eCheck payments are free for the 2026 collection cycle. Credit card, debit card and digital-wallet payments carry a 2.4% convenience fee. The county also accepts Apple Pay, Google Pay, PayPal and Venmo through its 2026 payment options.
9. Where can I view a McHenry County parcel map?
Use the county’s Athena interactive GIS property map. Athena combines geographic parcel data with property information such as ownership, assessed value and property sales. The map is useful for research and orientation but should not replace a licensed boundary survey.
10. Where do I search McHenry County deeds and liens?
Use the McHenry County Recorder’s Public Records Search Options. A free web search is available for index research, while Tapestry provides pay-as-you-go document access and Laredo is designed for professional high-volume land-record research.
Verified for this article: current Chief County Assessment Officer, township-assessor structure, 2026 online assessment-notice change, Richmond/Chemung/Dorr publication and complaint dates, 33⅓% assessment framework, 2026 Senior Freeze income change and July 1 filing deadline, 2026 Treasurer installment dates, free eCheck, 2.4% card/digital-wallet fee, Treasurer payment routes, late-payment penalty, Athena GIS, Recorder search options, office contacts and tax-year timing.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with McHenry County, any McHenry County township assessor, the McHenry County Office of Assessments, Board of Review, Treasurer, County Clerk, Recorder, GIS Department or Illinois Department of Revenue.
Assessment publication dates, complaint deadlines, exemptions, tax rates, payment fees, online portal features, township-assessor information, tax-sale status and land-record access can change. Always verify the live official record before filing an appeal, paying taxes, purchasing property, ordering title records or making legal or financial decisions.
County Property Search, Homestead & Tax Help Toolkit
Use this free helper to find the right county office, prepare a property search, understand appraised value,
review homestead exemption steps, and organize TRIM notice or tax bill questions before using official county websites.
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Helps users find official resources
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Useful after every article
Find the Correct County Office
Property Appraiser, Tax Collector, Clerk, GIS, and VAB offices do different jobs. Pick your task below.
Quick rule: Property Appraiser = value, records, parcel details, exemptions. Tax Collector = bill and payment.
Clerk/Recorder = deeds and recorded documents. VAB = formal value disputes.
Official Property Search Helper
Use this when a county article tells you to search by owner, address, parcel number, folio, PCN, STRAP, or alternate key.
Search tip: If address search fails, try only the house number and main street name. Avoid typing Street, Avenue, Road,
Drive, unit numbers, or punctuation unless the official portal requires it.
Homestead Exemption Readiness Check
This helps homeowners prepare before filing through the official county Property Appraiser website.
Important: This is not an eligibility decision. The official county Property Appraiser decides approval,
required documents, late filing options, and exemption status.
TRIM Notice & Value Review Helper
Use this to organize your questions before calling the Property Appraiser or preparing an appeal.
Your preparation checklist
Value term
Simple meaning
Market value
The appraiser’s estimate of the property’s value as of the assessment date.
Assessed value
The value after limits or caps may be applied.
Exemptions
Approved reductions such as homestead or other exemptions.
Taxable value
The value used by taxing authorities after exemptions.
Property Tax Bill Direction Helper
The Property Appraiser values property, but the Tax Collector usually handles the actual bill and payment.
Florida timing reminder: Many Florida tax bills are mailed around November and become delinquent if unpaid after March 31.
Always verify exact dates, discounts, and payment fees with the official county Tax Collector.
County Office Call Script Generator
Generate a simple call or email script so you can ask the right office the right question.