Illinois · County guide
McHenry County property tax appeal
A McHenry County property tax appeal is a complaint to the McHenry County Board of Review, filed through the county's online portal, within 30 days after your township's assessments are published. For McHenry Township in 2026 the deadline is Monday, October 5.
This season
- Next deadline
- Oct 5, 2026
- 2 days left
- McHenry Township · McHenry County Board of Review
Opens Sep 5, 2026Closes Oct 5, 2026
- Source: 2026 Township Filing Deadlines - McHenry County Board of ReviewLast checked
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- Example
- McHenry Township: October 5, 2026
- Where to file
- County e-filing portal (email not accepted)
- Office address
- 2200 N Seminary Ave, Admin Bldg Rm 106, Woodstock, IL 60098 · 815-334-4290
- Our coverage
- Free check available
- Independent guide — not affiliated with McHenry County or any government agency.
- Last updated
- October 1, 2026
- Sources last checked
- October 3, 2026
- Status
- Verified guide
When and where do I file a McHenry County property tax appeal?
Who hears a McHenry County appeal?
The stages in order. We are not affiliated with any of these offices.
- 1
- 2
Illinois Property Tax Appeal Board
Filing: appeal
Where is the McHenry County office?
McHenry County Board of Review[5]
- Address
- 2200 N Seminary Ave, Admin Bldg Rm 106, Woodstock, IL 60098
- Phone
- 815-334-4290
- Hours
- 8:00 am to 4:30 pm central
- Online
- Official website
Office[4]
McHenry County Office of Assessments
- Address
- Administration Building, Suite 106, 2200 N. Seminary Ave., Woodstock, Illinois 60098-2698
- Phone
- (815) 334-4290
- Fax
- (815) 334-4939
We are not affiliated with this office. Hours can change, so call before you visit.
Which McHenry County filing windows are coming up?
| Closes | Area | Who hears it | Status |
|---|---|---|---|
| Oct 5, 2026 | McHenry Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | 2 days left |
| Oct 22, 2026 | Alden Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Open now |
| Expected Jul 16, 2027 – Aug 27, 2027 | Richmond Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Forecast, not an official date |
| Expected Jul 23, 2027 – Sep 3, 2027 | Chemung Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Forecast, not an official date |
| Expected Aug 8, 2027 – Nov 3, 2027 | Dorr Township | McHenry County Board of Review · Official source · Last checked Oct 3, 2026 | Forecast, not an official date |
| Expected Aug 13, 2027 – Sep 24, 2027 | Grafton Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Forecast, not an official date |
| Expected Aug 14, 2027 – Sep 25, 2027 | Greenwood Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Forecast, not an official date |
| Expected Sep 4, 2027 – Oct 16, 2027 | Hartland Township | McHenry County Board of Review · Official source · Last checked Sep 29, 2026 | Forecast, not an official date |
Showing the 8 soonest of 9. Every township is listed below.
When were past McHenry County deadlines?
| Tax year | Window | Office |
|---|---|---|
| 2026 | Closed September 25, 2026 | Hartland · McHenry County Board of Review |
| 2026 | Closed September 17, 2026 | Coral · McHenry County Board of Review |
| 2026 | Closed September 4, 2026 | Greenwood · McHenry County Board of Review |
| 2026 | Closed September 3, 2026 | Grafton · McHenry County Board of Review |
| 2026 | Closed August 21, 2026 | Dorr · McHenry County Board of Review |
| 2026 | Closed August 13, 2026 | Chemung · McHenry County Board of Review |
| 2026 | Closed August 6, 2026 | Richmond · McHenry County Board of Review |
| 2025 | Closed October 10, 2025 | Alden · McHenry County Board of Review |
When is the McHenry County appeal deadline in 2026?
Each township has its own deadline, 30 days after the county publishes that township's assessments.
Will I get an assessment notice in McHenry County?
Not always. Starting in 2026, the county mails notices only for properties the assessor changed, farms and new construction. Others should check the published assessments.
How do I file a McHenry County complaint?
Find your township's publication date and deadline.
Submit your complaint and evidence through the county's e-filing portal. Emailed complaints are not accepted.
What happens after the Board of Review?
A McHenry County Board of Review decision can be appealed to the state Property Tax Appeal Board (PTAB) within 30 days of the written decision notice. PTAB charges no filing fee. The Illinois page covers the PTAB rules.
When is the deadline to appeal a property tax assessment in McHenry County?
The soonest deadline we list: McHenry, McHenry County Board of Review — Closes October 5, 2026. McHenry County Board of Review: In McHenry County, a Board of Review complaint must be filed within 30 days of the date your township's assessments are published.
- Deadline ruleMcHenry County Board of Review
- In McHenry County, a Board of Review complaint must be filed within 30 days of the date your township's assessments are published.[1]
- Deadline detailNotices
- Starting in 2026, McHenry County mails assessment notices only for properties the assessor changed, farms and new construction; everyone else must check the published list.[2]
Who decides a property tax appeal in McHenry County?
McHenry County Board of Review · Dismissal: A McHenry County complaint that the Board of Review dismisses cannot be appealed to the Illinois Property Tax Appeal Board (PTAB). McHenry County Board of Review: In McHenry County you file an assessment complaint with the Board of Review within 30 days of your township's publication date, preferably through the online Complaint Submission tool.
- Appeal stepsMcHenry County Board of Review · Dismissal
- A McHenry County complaint that the Board of Review dismisses cannot be appealed to the Illinois Property Tax Appeal Board (PTAB).[3]
- What the appeal is calledMcHenry County Board of Review
- In McHenry County you file an assessment complaint with the Board of Review within 30 days of your township's publication date, preferably through the online Complaint Submission tool.[3]
How do I file a property tax appeal in McHenry County?
McHenry County Board of Review: McHenry County complaints are submitted through the county's e-filing portal; emailed complaints are not accepted. McHenry County Board of Review · Confirmation: When you submit a McHenry County complaint online and enter your email, you are sent a copy of your complaint and evidence.
- How to fileMcHenry County Board of Review
- McHenry County complaints are submitted through the county's e-filing portal; emailed complaints are not accepted.[1]
- How to fileMcHenry County Board of Review · Confirmation
- When you submit a McHenry County complaint online and enter your email, you are sent a copy of your complaint and evidence.[1]
- FormsMcHenry County Board of Review
- McHenry County encourages its online Complaint Submission tool; a paper complaint form is available by email or phone.[3]
- FormsMcHenry County Board of Review · Grid required
- In McHenry County a Board of Review complaint form must be submitted together with a comparable grid; both are required.[1]
- FormsMcHenry County Board of Review · Rules
- The McHenry County Board of Review adopted its 2026 rules as of June 1, 2026; they are posted on the Board of Review page.[4]
- FormsMcHenry County Board of Review · Supplemental
- McHenry County's Filing a Complaint page offers guides (Ten Steps to a Fair Assessment, How to File a Complaint, an example residential complaint) and supplemental forms such as a photo template.[1]
- Who may fileMcHenry County Board of Review
- Every McHenry County representative must file the authorization form with an original or secure digital signature, or similar proof of authorization.[3]
What applies to my township?
Each township has its own page with its dates and local figures. Your township is printed on your assessment notice.
- AldenOpenOct 22, 2026 · McHenry County Board of ReviewMedian home assessment $101,488
- ChemungForecastExpected Jul 23, 2027 – Sep 3, 2027 · McHenry County Board of ReviewMedian home assessment $65,291
- CoralForecastExpected Sep 17, 2027 – Dec 4, 2027 · McHenry County Board of ReviewMedian home assessment $128,748
- DorrForecastExpected Aug 8, 2027 – Nov 3, 2027 · McHenry County Board of ReviewMedian home assessment $96,579
- GraftonForecastExpected Aug 13, 2027 – Sep 24, 2027 · McHenry County Board of ReviewMedian home assessment $118,304
- GreenwoodForecastExpected Aug 14, 2027 – Sep 25, 2027 · McHenry County Board of ReviewMedian home assessment $83,828
- HartlandForecastExpected Sep 4, 2027 – Oct 16, 2027 · McHenry County Board of ReviewMedian home assessment $120,335
- McHenryOpenOct 5, 2026 · McHenry County Board of ReviewMedian home assessment $82,223
- RichmondForecastExpected Jul 16, 2027 – Aug 27, 2027 · McHenry County Board of ReviewMedian home assessment $126,770
What evidence counts in McHenry County, and can the value go up?
Can my assessment go up if I appeal?
Yes, it can. The McHenry County Board of Review, like other Illinois county boards outside Cook, may raise an assessment, but only after notifying the owner and giving a chance to be heard.
What evidence can I use in McHenry County?
McHenry County Board of Review · Comparable properties: McHenry County's residential complaint needs at least 3 comparables on the grid, which allows up to 9. McHenry County Board of Review · Photos: Photos sent as evidence to the McHenry County Board of Review must each be labeled with the property index number or address; a template is available.
- Evidence ruleMcHenry County Board of Review · Comparable properties
- McHenry County's residential complaint needs at least 3 comparables on the grid, which allows up to 9.[3]
- Evidence ruleMcHenry County Board of Review · Photos
- Photos sent as evidence to the McHenry County Board of Review must each be labeled with the property index number or address; a template is available.[1]
- Evidence ruleMcHenry County Board of Review · Vacancy
- For a McHenry County commercial vacancy complaint, the Board of Review asks for a Vacancy Affidavit and three years of financial reports.[1]
Can my assessment go up if I appeal in McHenry County?
McHenry County Board of Review: McHenry County's Board of Review rules say the Board can confirm, reduce or increase any assessment to what it considers fair and just.
- Can the value go up?McHenry County Board of Review
- McHenry County's Board of Review rules say the Board can confirm, reduce or increase any assessment to what it considers fair and just.[5]
Which Illinois rules apply in McHenry County?
These rules are the same in every Illinois county. Each link opens the rule on the Illinois page.
What do McHenry County property taxes and assessments look like?
Figures from public records and the Census, each with its source. They describe the county's homes as a group, not the value of any one home.
What do homeowners in McHenry County pay in property tax?
The median owner-occupied home in McHenry County was worth $308,100, and the median property tax its owners paid was $7,274 a year, according to the Census Bureau's American Community Survey.
- Median home value
- $308,100
- Margin of error ±$3,743.
- Median property tax paid per year
- $7,274
- Margin of error ±$94.
- Median tax as a share of median value
- 2.36%
- A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
- Owner-occupied homes
- 97,259
- Margin of error ±1,207.
These are survey estimates of what owners reported about their own homes. They are not assessed values, not tax rates, and not an opinion of what any home is worth.
They cannot tell you whether your own assessment is fair. That takes a comparison with similar homes, which we offer only in counties we have researched.
From the county's assessment and appeal records
- Homes in the county's assessment records
- 109,208
- Median assessed value
- $99,874
- Middle half of assessed values
- $75,448 to $128,666
Source: The county's open assessment data, aggregated by us (tax year 2024 final values). Our calculation from public records; not an opinion of any home's value.
How McHenry County home assessments are spread
Assessed value
Median home value: McHenry County compared
- McHenry County$308,100
- Typical Illinois county$134,650
- Typical US county$185,300
McHenry County $308,100; Typical US county $185,300; Typical Illinois county $134,650
Median property tax paid: McHenry County compared
- McHenry County$7,274
- Typical Illinois county$2,431
- Typical US county$1,619
McHenry County $7,274 a year; Typical Illinois county $2,431 a year; Typical US county $1,619 a year
Median home assessment by township
- Coral$128,748
- Richmond$126,770
- Burton$125,615
- Seneca$123,525
- Hartland$120,335
- Grafton$118,304
- Riley$111,189
- Alden$101,488
- Algonquin$101,235
- Nunda$97,316
- Dorr$96,579
- Greenwood$83,828
- Mchenry$82,223
- Hebron$77,177
- Marengo$73,615
- Dunham$69,667
- Chemung$65,291
Median assessed value by township: highest Coral ($128,748), lowest Chemung ($65,291).
McHenry County filing windows on a calendar
- Open
- Opens soon
- Forecast
- McHenry TownshipOct 5, 2026 · McHenry County Board of Review · Open now
- Alden TownshipOct 22, 2026 · McHenry County Board of Review · Open now
- Richmond TownshipExpected Jul 16, 2027 – Aug 27, 2027 · McHenry County Board of Review · Forecast, not an official date
- Chemung TownshipExpected Jul 23, 2027 – Sep 3, 2027 · McHenry County Board of Review · Forecast, not an official date
- Dorr TownshipExpected Aug 8, 2027 – Nov 3, 2027 · McHenry County Board of Review · Forecast, not an official date
- Grafton TownshipExpected Aug 13, 2027 – Sep 24, 2027 · McHenry County Board of Review · Forecast, not an official date
- Greenwood TownshipExpected Aug 14, 2027 – Sep 25, 2027 · McHenry County Board of Review · Forecast, not an official date
- Hartland TownshipExpected Sep 4, 2027 – Oct 16, 2027 · McHenry County Board of Review · Forecast, not an official date
- Coral TownshipExpected Sep 17, 2027 – Dec 4, 2027 · McHenry County Board of Review · Forecast, not an official date
The dashed line marks today.
McHenry Township: Oct 5, 2026; Alden Township: Oct 22, 2026; Richmond Township: Expected Jul 16, 2027 – Aug 27, 2027; Chemung Township: Expected Jul 23, 2027 – Sep 3, 2027; Dorr Township: Expected Aug 8, 2027 – Nov 3, 2027; Grafton Township: Expected Aug 13, 2027 – Sep 24, 2027; Greenwood Township: Expected Aug 14, 2027 – Sep 25, 2027; Hartland Township: Expected Sep 4, 2027 – Oct 16, 2027; Coral Township: Expected Sep 17, 2027 – Dec 4, 2027
Homes in McHenry County
From the Census Bureau's American Community Survey: how old the homes are, what kind they are, what owners say they are worth and the property taxes they pay. These figures describe all homes together, not any one home.
- Median year built
- 1989
- All housing units, owned and rented
- Single-family houses, detached or attached
- 87%
- of 121,329 housing units
- Owned homes with a mortgage or similar loan
- 68%
- of 97,259 owner-occupied homes
Home values reported by owners
- Less than $50,0003%
- $50,000 to $99,9991%
- $100,000 to $199,99915%
- $200,000 to $299,99929%
- $300,000 to $399,99927%
- $400,000 to $499,99915%
- $500,000 to $749,9998%
- $750,000 to $999,9991%
- $1,000,000 to $1,999,9991%
- $2,000,000 or more<1%
Home values reported by owners in McHenry County: Less than $50,000 3%; $50,000 to $99,999 1%; $100,000 to $199,999 15%; $200,000 to $299,999 29%; $300,000 to $399,999 27%; $400,000 to $499,999 15%; $500,000 to $749,999 8%; $750,000 to $999,999 1%; $1,000,000 to $1,999,999 1%; $2,000,000 or more <1%.
Property taxes owners pay a year
- No real estate taxes2%
- Less than $8002%
- $800 to $1,4992%
- $1,500 to $1,9991%
- $2,000 to $2,9994%
- $3,000 or more89%
Property taxes owners pay a year in McHenry County: No real estate taxes 2%; Less than $800 2%; $800 to $1,499 2%; $1,500 to $1,999 1%; $2,000 to $2,999 4%; $3,000 or more 89%.
Source: U.S. Census Bureau, American Community Survey (2020–2024 5-year estimates, tables B25075, B25102, B25035, B25024 and B25081), retrieved Oct 1, 2026. Survey estimates have a margin of error.
More questions about McHenry County property tax appeals
When is the McHenry County property tax appeal deadline?
The McHenry County Board of Review window closes October 5, 2026. McHenry County Board of Review: In McHenry County, a Board of Review complaint must be filed within 30 days of the date your township's assessments are published.[1][6]
Where do I file a Board of Review appeal in McHenry County?
McHenry County complaints are submitted through the county's e-filing portal; emailed complaints are not accepted.[1]
Can my assessed value go up if I appeal in McHenry County?
McHenry County's Board of Review rules say the Board can confirm, reduce or increase any assessment to what it considers fair and just.[5]
What other rules apply in McHenry County?
McHenry County Board of Review: In McHenry County you can view your submitted complaint and the assessor's response online through the county's Complaint Data Search.
- Assessor's evidence you can ask forMcHenry County Board of Review
- In McHenry County you can view your submitted complaint and the assessor's response online through the county's Complaint Data Search.[4]
Which details are not confirmed yet?
We show a fact only after a person has checked it against the official source. These are still being checked. Until then, ask the McHenry County Board of Review:
- How often homes are reassessed
- Filing fee
Property tax guides for McHenry County homeowners
- Illinois Board of Review Appeals: How They WorkMcHenry County
- Homestead Exemption: What It Is and How to Get ItIllinois · McHenry County
- How to Lower Your Property Taxes: What to Check FirstIllinois · McHenry County
Counties next to McHenry County
- Cook County property tax appealsFree check availableNext deadline: Oct 8, 2026
- Lake County property tax appealsFree check availableNext deadline: Oct 5, 2026
- Boone County property tax appealsWaitlist open
- Kane County property tax appealsWaitlist open
- DeKalb County property tax appealsWaitlist open
Check a McHenry County home free
You decide and file yourself.
Where do these facts come from?
- [1]Filing a Complaint | McHenry County, IL (Wayback capture 2026-03-19)Official notice, form, calendar or rules · last checked Sep 30, 2026
- [2]Assessor - McHenry TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [3]Filing A Complaint | McHenry County AssessmentsOfficial guide or FAQ · last checked Sep 29, 2026
- [4]Board of Review | McHenry County, IL (Wayback capture 2026-08-12)Official notice, form, calendar or rules · last checked Sep 30, 2026
- [5]Rules Governing Business Before the Board of Review of McHenry County, 2026 (PDF)Official notice, form, calendar or rules · last checked Sep 29, 2026
- [6]2026 Township Filing Deadlines - McHenry County Board of ReviewOfficial notice, form, calendar or rules · last checked Sep 28, 2026
- [7]Dorr Township Board minutes, November 9, 2023 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [8]Dorr Township Board minutes, August 13, 2024 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [9]Dorr Township Board minutes, August 12, 2025 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [10]Coral Township board meeting minutes, November 2023 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [11]35 ILCS 200/9-145 - Illinois Property Tax Code (ILGA; Wayback capture 2025-05-13)Statute or regulation · last checked Sep 24, 2026
- [12]35 ILCS 200/16-55 - Illinois Property Tax Code (ILGA; Wayback capture 2025-12-22)Statute or regulation · last checked Sep 24, 2026
- [13]Assessment Appeals - Property Tax (Illinois Department of Revenue)Official guide or FAQ · last checked Sep 30, 2026
- [14]Property Tax - Exemption Information (PIO-74) (Illinois Department of Revenue)Official guide or FAQ · last checked Sep 30, 2026
- [15]86 Ill. Adm. Code 1910.50 - Property Tax Appeal Board rules (JCAR/ILGA; Wayback capture 2026-05-06)Statute or regulation · last checked Sep 24, 2026
- [16]2025 Township Filing Deadlines - McHenry County Board of Review (Wayback capture 2025-11-10)Official notice, form, calendar or rules · last checked Oct 2, 2026
- [17]Assessment Rollbook, McHenry County, Township ALDEN TWP, Tax Year 2024 (PDF, 392 pages; Wayback capture 2025-11-12)Official notice, form, calendar or rules · last checked Oct 2, 2026
- [18]Township Assessors in McHenry County – Dorr TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [19]Chemung Township - Township AssessorOfficial guide or FAQ · last checked Oct 1, 2026
- [20]Chemung Township - Contact UsOfficial guide or FAQ · last checked Oct 1, 2026
- [21]Coral Township board meeting minutes, September 2024 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [22]Coral Township board meeting minutes, April 2024 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [23]Coral Township board meeting minutes, October 2025 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [24]Assessor – Coral TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [25]Coral Township – Smarter GrowthOfficial guide or FAQ · last checked Oct 1, 2026
- [26]Information on Appeals – Dorr TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [27]Dorr Township Annual Town Meeting minutes, April 9, 2024 (PDF) - Assessor's reportOfficial guide or FAQ · last checked Oct 1, 2026
- [28]Dorr Township Board minutes, November 13, 2025 (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [29]Contact – Dorr TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [30]Assessor – Dorr TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [31]Grafton Township > Assessor > Assessment InformationOfficial guide or FAQ · last checked Oct 1, 2026
- [32]Grafton Township > AssessorOfficial guide or FAQ · last checked Oct 1, 2026
- [33]Appeal Information – Greenwood Township – McHenry County, ILOfficial guide or FAQ · last checked Oct 1, 2026
- [34]Assessor’s Office – Greenwood Township – McHenry County, ILOfficial guide or FAQ · last checked Oct 1, 2026
- [35]Contact Us – Greenwood Township – McHenry County, ILOfficial guide or FAQ · last checked Oct 1, 2026
- [36]Assessors Office – Hartland TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [37]Contact Us – Hartland TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [38]Meetings & Events – Hartland TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [39]Appeals - McHenry TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [40]A Taxpayer's Guide to Property Tax Relief 2026 - McHenry Township Assessor (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [41]McHenry Township Board packet, August 13, 2026 (PDF) - Assessor's reportOfficial guide or FAQ · last checked Oct 1, 2026
- [42]Richmond Township Assessor - Home PageOfficial guide or FAQ · last checked Oct 1, 2026
- [43]Assessor | Richmond Township Illinois 60071Official guide or FAQ · last checked Oct 1, 2026
- 44.County open data: mchenry assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 45.County open data: mchenry assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 46.County open data: mchenry parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 47.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — McHenry County, Illinois
- 48.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — McHenry County, Illinois
- 49.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — McHenry County, Illinois
Data credits: Census ACS (public domain) · Census county adjacency (public domain)
Not affiliated with McHenry County or any government agency. Not legal advice. Not an appraisal.