Knox County Property Tax Appeal, Ohio

Travis Bunn·Updated July 25, 2026

Knox County is located in central Ohio with Mount Vernon as its county seat. With a population of approximately 62,721, the county includes the communities of Mount Vernon, Fredericktown, Centerburg, Danville, and Gambier. Property tax appeals are particularly important in Knox County given the county's median effective tax rate of 1.38%, which exceeds the national median of 1.02%, resulting in a median annual tax bill of $2,548 compared to the national median of $2,400. The county's median home value of approximately $190,840 is below the national median, but homeowners still face a higher relative tax burden, making careful review of assessments crucial for protecting your property investment.

Notable cities: Mount Vernon, Fredericktown, Centerburg, Danville, Gambier

Median Home

$190,840

Tax Rate

1.38%

Annual Tax

$2,548

Population

62,721

On the typical Knox County home, valued near $190,840 at the county’s effective tax rate of 1.38%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: January 1, 2027 through March 31, 2027

This year's appeal window has passed in most of Ohio. Order now and we re-run your numbers free when the window reopens, so your evidence is ready the day your next notice lands.

For Tax Year 2026 assessments, formal complaints must be filed with the Knox County Board of Revision between January 1, 2027 and March 31, 2027. For the 2026 reappraisal, Knox County offered informal hearings July 29-31, 2026, which provided an opportunity to resolve disputes before filing a formal Board of Revision complaint. The March 31 deadline is firm with no extensions.

See if your Knox County home is over-assessed

Free analysis in 30 seconds. If the numbers support a appeal, your complete evidence packet is $49.

✓ All 50 states✓ Instant results✓ $49 flat fee

Ohio residential street of family homes. Knox County appeal guide.

How Knox County Assesses Property

35%of market value

Assessed by: Knox County Auditor's Office

Assessment cycle: triennial

Notices typically mailed: April 2026

In Ohio, property is assessed at 35% of its market value, meaning your taxable assessed value is significantly lower than what your home would sell for on the open market. For example, if your home's market value is $190,000, at Ohio's 35% assessment ratio your assessed value would be $66,500. At Knox County's effective tax rate of 1.38%, this would result in approximately $2,622 in annual property taxes. Knox County completed a countywide reappraisal in 2026, with the next reappraisal scheduled for 2028 as the county transitions to a biennial assessment cycle.

The Appeal Process

Appeals are heard by the Board of Revision. The Knox County Board of Revision consists of the County Auditor, County Treasurer, and a County Commissioner. Hearings are typically brief (5-15 minutes), and you will present your evidence supporting your opinion of value while the auditor's office may present evidence supporting the current assessment.

Step 1: Request an informal hearing (optional but recommended). For the 2026 reappraisal, informal hearings were held July 29-31, 2026. Contact the Knox County Auditor's Office at 740-393-6750 to request an informal review before filing a formal complaint.

Step 2: Gather supporting evidence including recent comparable sales (within past 3 years) of similar properties in your neighborhood, photos documenting property condition or defects, recent professional appraisal if available, and repair estimates for any needed work.

Step 3: Complete DTE Form 1 (Complaint Against the Valuation of Real Property) available from the Knox County Auditor's website at knoxcountyauditor.org or by calling 740-393-6750. Include your parcel number, current assessed value, your opinion of market value, and detailed justification.

Step 4: File your completed DTE Form 1 with all supporting documentation to the Knox County Board of Revision between January 1 and March 31 of the year following the tax year. For Tax Year 2026, file between January 1, 2027 and March 31, 2027. Forms postmarked by March 31 are accepted.

Step 5: Attend your Board of Revision hearing. You will be notified of your hearing date and will have 5-15 minutes to present your evidence. The Board consists of the County Auditor, County Treasurer, and a County Commissioner member.

Step 6: Receive the Board's decision by mail. If you disagree with the Board of Revision decision, you have 30 days from the decision date to file DTE Form 4 (Notice of Appeal) with either the Ohio Board of Tax Appeals or the Court of Common Pleas.

Step 7: If necessary, appeal to the State Board of Equalization within 30 days of the Board of Revision decision. Further appeals to the Court of Common Pleas are available within 60 days of the final State Board decision.

Required form: DTE Form 1 - Complaint Against the Valuation of Real Property

Filing Methods

mail:Knox County Auditor, Attn: Board of Revision, 117 East High Street, Suite 120, Mount Vernon, OH 43050

in-person:Knox County Auditor's Office, 117 East High Street, Suite 120, Mount Vernon, OH 43050, Monday-Friday 8:00 AM - 4:00 PM

email:Contact auditor's office at 740-393-6750 for email filing instructions

Evidence to Bring

Recent comparable sales (within 3 years) of similar propertiesProfessional appraisal reportPhotographs documenting property condition or defectsRepair estimates for needed workRecent listing information if property was listed for saleDocumentation of property damage or obsolescence

Knox County Assessor Contact

Knox County Auditor's Office

Phone: 740-393-6750

Address: 117 East High Street, Suite 120, Mount Vernon, OH 43050

Website: https://www.knoxcountyauditor.org

Hours: Monday - Friday, 8:00 AM - 4:00 PM

Tax Exemptions in Knox County

Homestead Exemption (Senior/Disabled)

$29,000 reduction in taxable value

Provides property tax reduction for qualifying senior citizens (65+), disabled persons, and surviving spouses. The exemption reduces taxable value by $29,000 as of 2026.

Eligibility: Age 65 or older as of January 1, OR totally and permanently disabled, OR surviving spouse of qualifying individual. For applications filed in 2026 or later, household Ohio Adjusted Gross Income must not exceed $41,000. Those who received the exemption before 2014 are grandfathered and exempt from income test.Deadline: December 31 of application year

Enhanced Homestead Exemption (100% Disabled Veterans)

$58,000 reduction in taxable value (exempts first $52,300-$58,000 of home value from taxation)

Enhanced exemption for disabled veterans with 100% service-connected disability rating and their surviving spouses, or surviving spouses of public service officers killed in the line of duty.

Eligibility: Veterans with 100% service-connected disability rating, surviving spouses of 100% disabled veterans, or surviving spouses of public service officers killed in the line of duty. No income requirement.Deadline: December 31 of application year

Owner Occupancy Credit (2.5% Tax Reduction)

2.5% reduction in property tax bill

Provides a 2.5% reduction in property taxes for owner-occupied primary residences. This is a separate benefit from the homestead exemption.

Eligibility: Any property owner who resides in their home as their principal place of residence as of January 1 of the filing year. Homeowner and spouse entitled to reduction on only one home in Ohio.Deadline: First-time applicants should file before the end of the year; reduction appears on following year's tax bill

County Homestead Exemption

Mirrors the state homestead exemption amount (approximately $270,679 in total county relief in 2025)

Knox County enacted a local homestead exemption that piggybacks on the state exemption, taking effect for tax year 2025 (payable in 2026). Provides additional relief for qualifying low-income seniors.

Eligibility: Same eligibility as state homestead exemption: age 65+, disabled, or surviving spouse with household income under $41,000 OAGI limitDeadline: December 31 of application year

Current Agricultural Use Valuation (CAUV)

Significant reduction based on agricultural value instead of market value

Provides tax relief for qualifying farmland by valuing it based on agricultural use rather than development potential.

Eligibility: Land of 10+ acres devoted exclusively to agricultural use, or tracts under 10 acres with at least $2,500 average yearly gross farm income from agricultural products over past 3 yearsDeadline: Contact Knox County Auditor at 740-393-6748 for application deadline

Knox County Appeal Packet · $49

Comparable sales evidence, county-specific filing guide, and professional cover letter. Enter your address to get started.

✓ All 50 states✓ Instant results✓ $49 flat fee

Frequently Asked Questions

What is the deadline to appeal my property taxes in Knox County for 2026?

For Tax Year 2026 assessments, you must file your formal appeal (DTE Form 1) with the Knox County Board of Revision between January 1, 2027 and March 31, 2027. This deadline is firm with no extensions allowed, and appeals must be received or postmarked by March 31, 2027. However, Knox County also offers informal hearings before the formal appeal period, for the 2026 reappraisal, informal hearings were held July 29-31, 2026, allowing property owners to resolve disputes early without filing a formal complaint.

How do I file a property tax appeal in Knox County?

To file an appeal in Knox County, you must complete DTE Form 1 (Complaint Against the Valuation of Real Property) and submit it to the Knox County Board of Revision at 117 East High Street, Suite 120, Mount Vernon, OH 43050. You can file by mail, in person during business hours (Monday-Friday 8:00 AM-4:00 PM), or by email after contacting the auditor's office at 740-393-6750. Include your parcel number, the auditor's current market value, your opinion of the correct market value, and all supporting evidence such as comparable sales, photos, and appraisal reports. Filing is free and forms are available at knoxcountyauditor.org.

What happens at an informal hearing versus a Board of Revision hearing in Knox County?

Knox County offers two levels of appeal: informal hearings and formal Board of Revision hearings. Informal hearings (held July 29-31, 2026 for the 2026 reappraisal) allow you to meet with auditor's office staff to discuss your property value and resolve disputes before filing a formal complaint. These are optional but recommended. If the informal review doesn't resolve your concerns, you can then file a formal appeal with the Board of Revision, which consists of the County Auditor, County Treasurer, and a County Commissioner. Board of Revision hearings are more formal, typically lasting 5-15 minutes, where you present evidence and the board makes a binding decision that can be appealed to the State Board of Equalization.

What is the homestead exemption worth in Knox County?

Knox County offers both state and county homestead exemptions that can provide substantial property tax savings. The state homestead exemption reduces your taxable value by $29,000 for qualifying seniors (age 65+), disabled persons, and surviving spouses with household income under $41,000. For 100% disabled veterans and surviving spouses of officers killed in the line of duty, the enhanced exemption removes the first $52,300-$58,000 of home value from taxation with no income limit. Additionally, Knox County enacted its own homestead exemption in 2025 that mirrors the state exemption, essentially doubling the benefit. Combined with the 2.5% Owner Occupancy Credit available to all owner-occupants, these exemptions can save qualifying homeowners several hundred dollars annually.

How much can I save by appealing my property taxes in Knox County?

The potential savings from a successful Knox County property tax appeal depends on how much your assessment is reduced. In Ohio, a successful Board of Revision complaint typically reduces property value by 10-20%. For example, if your home is assessed at a market value of $200,000 and you achieve a 15% reduction to $170,000, your assessed value would drop from $70,000 to $59,500 (at the 35% assessment ratio). At Knox County's 1.38% effective tax rate, this would save you approximately $145 per year. Over several years until the next reappraisal, the cumulative savings could reach $400-$500 or more, making the appeal process well worth the effort for overassessed properties.

What evidence do I need for a Knox County property tax appeal?

The strongest evidence for a Knox County property tax appeal includes recent comparable sales (within the past 3 years) of similar properties in your neighborhood showing lower prices per square foot than your assessed value suggests. You should also provide a professional appraisal if available, photographs documenting property condition issues or defects, repair estimates for needed work, and recent listing information if your property was on the market. Make sure comparable sales are truly similar in size, age, condition, and location. The Knox County Board of Revision gives the most weight to actual arms-length sale prices of comparable properties, so focus your evidence on demonstrating that your property's market value is lower than the auditor's assessment based on real market data.

Can I appeal every year in Knox County, or are there restrictions?

In Ohio, including Knox County, you can generally file a Board of Revision complaint once every three years unless there has been a qualifying change to your property. The formal appeal period is January 1 through March 31 each year for the prior tax year. However, if you filed a complaint since the last reappraisal or update and want to file again, you must demonstrate one of several qualifying reasons under Ohio Revised Code 5715.19, such as physical changes to the property, clerical errors, or changes in market conditions. Knox County completed a full reappraisal in 2026 and is transitioning to a biennial (every two years) reappraisal cycle, with the next reappraisal in 2028. After a reappraisal year, most property owners have the right to file an appeal.

What is Knox County's assessment ratio and how does it affect my property taxes?

Knox County, like all Ohio counties, uses a 35% assessment ratio, meaning your property is assessed at 35% of its market value for tax purposes. This is mandated by Ohio state law and applies uniformly across the state. For example, if your home has a market value of $190,000, your assessed value would be $66,500 ($190,000 × 0.35). Your annual property taxes are then calculated by applying the total millage rate (tax rate) to this assessed value. Understanding this ratio is crucial when appealing because you need to challenge the market value, not the assessed value. If you believe your home's market value should be $170,000 instead of $190,000, you would present evidence to support the lower market value, and the assessed value would automatically adjust to 35% of whatever market value is determined.

Official Resources

Knox County Auditor's Office - Official Website →

Access property search, tax estimators, exemption applications, and Board of Revision information from the official Knox County Auditor website.

Knox County Property Search (Beacon) →

Search property records, view assessments, review sales history, and access parcel information for any property in Knox County.

Ohio Department of Taxation - Real Property Forms →

Download official DTE forms including Form 1 (property valuation complaint), homestead exemption applications, and other property tax forms required by Ohio law.

Knox County Treasurer - Pay Property Taxes →

Pay your property taxes online, view payment history, and access tax bill information through the Knox County Treasurer's office.

For state-wide appeal information including Ohio's assessment ratio and deadlines, see our Ohio 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 →

More Ohio Counties

Adams County (West Union)Allen County (Lima)Ashland County (Ashland)Ashtabula County (Jefferson)Athens County (Athens)Auglaize County (Wapakoneta)

← All Ohio property tax appeal info

Sources: https://www.knoxcountyauditor.org | https://property.knoxcounty.org/i-want-to/appeals/ | https://www.ownwell.com/trends/ohio/knox-county | https://www.tax-rates.org/ohio/knox_county_property_tax | https://beacon.schneidercorp.com/Application.aspx?AppID=1124

Last verified: 2026-07-25