Darke County is located in western Ohio, with Greenville serving as the county seat. Major population centers include Greenville (population approximately 12,700) and Versailles. The county has a population of approximately 51,881 according to the 2020 census and is part of the Greenville Micropolitan Statistical Area. Property tax appeals are particularly important in Darke County, where the median annual property tax bill of $1,139 to $1,620 is significantly below the national median of $2,400, but homeowners may still be overassessed. With an effective tax rate ranging from 0.99% to 1.19%, Darke County residents pay relatively moderate property taxes compared to many Ohio counties, making appeals worthwhile when assessments are inflated.
On the typical Darke County home, valued near $173,200 at the county’s effective tax rate of 1.19%, 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: March 31, 2026
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.
In Ohio, property tax appeals must be filed with the Board of Revision between January 1 and March 31 each year. For 2026, the deadline is March 31, 2026 at 11:59 PM EST. This is a strict statutory deadline with no extensions. Mailed complaints must be received by March 31 or postmarked by the U.S. Postal Service on or before March 31. Missing this deadline means waiting until the next calendar year to appeal.
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How Darke County Assesses Property
35%of market value
Assessed by: Darke County Auditor's Office
Assessment cycle: sexennial with triennial updates
Notices typically mailed: Spring
In Ohio, properties are assessed at 35% of their market value for property tax purposes. This means the assessed value is always lower than your home's market value. For example, if your home's market value is $173,200 (the county median), at Ohio's 35% assessment ratio your assessed value would be $60,620, resulting in approximately $1,620 in annual taxes at Darke County's effective rate of 1.19%. The Darke County Auditor determines your property's market value through a sexennial (six-year) reappraisal cycle, with triennial (three-year) updates between full reappraisals to reflect market trends.
The Appeal Process
Appeals are heard by the Board of Revision. The Darke County Board of Revision consists of three members: the County Auditor, County Treasurer, and President of the County Commissioners (or their representatives). At your hearing, you will present evidence showing why your property's market value should be lowered. The Board can only change property values, not tax rates. Keep your presentation under 15 minutes and focus on comparable sales data and factual errors in your property record.
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Step 1: Request an informal review with the Darke County Auditor's Office before filing a formal appeal. Contact the Auditor at (937) 547-7310 to discuss your property valuation. The Auditor may review your concerns and potentially adjust your value without requiring a formal Board of Revision hearing.
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Step 2: Gather evidence to support your appeal, including recent comparable home sales in your neighborhood (3-5 properties), a recent independent appraisal if available, photographs documenting property condition or defects, and repair estimates for any structural issues. Verify your property details on the county auditor's website for errors in square footage, bedrooms, or lot size.
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Step 3: Complete DTE Form 1 (Complaint Against the Valuation of Real Property), available from the Ohio Department of Taxation website or the Darke County Auditor's Office. Include your parcel number, current assessed value, your opinion of the correct market value, and the reasons for your complaint. Sign and date the form.
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Step 4: File your completed DTE Form 1 with all supporting documentation to the Darke County Board of Revision between January 1 and March 31, 2026. You can mail it to Darke County Auditor, Attn: Board of Revision, 504 S. Broadway, Greenville, OH 45331, or deliver it in person during business hours.
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Step 5: Attend your Board of Revision hearing. You will receive notice of your hearing date by certified mail at least 2 weeks prior. Present your evidence clearly and concisely. The three-member Board (County Auditor, County Treasurer, and a County Commissioner) will review your case. If your appeal is denied, you have 30 days to appeal to the Ohio Board of Tax Appeals (file DTE Form 4) or to the Court of Common Pleas.
Required form: DTE Form 1 - Complaint Against the Valuation of Real Property
Filing Methods
mail:Darke County Auditor, Attn: Board of Revision, 504 S. Broadway, Courthouse 1st Floor, Greenville, OH 45331
in-person:Deliver to Darke County Auditor's Office, 504 S. Broadway, Courthouse 1st Floor, Greenville, OH 45331 during business hours (Monday-Friday, 7:30 AM - 4:00 PM)
phone:Call (937) 547-7310 to request an appeal form or ask questions about the filing process
Evidence to Bring
Recent comparable home sales (3-5 properties sold within the past 12 months in your neighborhood)Independent appraisal report (if obtained within the past year)Photographs documenting property condition, defects, or needed repairsRepair estimates or contractor bids for structural issuesProperty record printout showing errors in square footage, lot size, or featuresRecent purchase closing statement (if bought within the past 12 months for less than assessed value)
$29,000 reduction in market value (approximately $10,150 in assessed value)
The Ohio Homestead Exemption removes up to $29,000 of your home's market value from taxation for the 2026 tax year, which translates to approximately $10,150 in assessed value reduction (at 35% assessment ratio). This can save eligible homeowners between $400-$800 annually depending on local millage rates.
Eligibility: Available to homeowners age 65 or older by December 31 of the tax year, OR permanently and totally disabled persons, OR surviving spouses of public service officers killed in the line of duty. Must own and occupy the home as primary residence on January 1 of the tax year. Income limit: Ohio Adjusted Gross Income must be $41,000 or less for 2026 (based on 2025 income). Some applicants grandfathered in before 2014 may not be subject to income limits.Deadline: December 31 of the year for which exemption is sought (late applications accepted through the first Monday in June of the following year). File with the Darke County Auditor using DTE Form 105A.
Disabled Veterans Exemption
Up to $60,000 reduction in market value (approximately $21,000 in assessed value) for 100% disabled veterans
Enhanced homestead exemption for qualifying disabled veterans provides significant property tax relief without income restrictions. Veterans with 100% service-connected disability rating receive the highest benefit level.
Eligibility: Honorably discharged veterans who have received a 100% disability rating for service-connected disabilities from the U.S. Department of Veterans Affairs, OR those with a 100% disability rating based on individual unemployability. Must own and occupy the home as primary residence. No income limit applies. Surviving spouses may continue to receive the exemption if they do not remarry.Deadline: File DTE Form 105I with the Darke County Auditor. Application deadline is December 31 of the year for which exemption is sought.
Owner Occupancy Tax Reduction
2.5% reduction in assessed value
Ohio's 2.5% owner-occupancy reduction is available to all homeowners who occupy their property as a primary residence, regardless of age or income. This is a separate benefit from the homestead exemption.
Eligibility: All homeowners who own and occupy their property as their primary residence as of January 1 of the tax year. No age or income restrictions apply.Deadline: File DTE Form 105C with the Darke County Auditor by the first Monday in June following the tax year.
Current Agricultural Use Valuation (CAUV)
Varies based on land type and agricultural use; typically results in 50-80% reduction compared to market valuation
Farmland and agricultural property may qualify for current agricultural use valuation, which values land based on its agricultural productivity rather than its market value for development, resulting in substantial tax savings for working farms.
Eligibility: Land must be devoted exclusively to commercial agricultural use for at least three years prior to application. Minimum acreage requirements and gross income thresholds apply. Forest land, conservation easements, and certain other uses may also qualify.Deadline: Applications for CAUV must be filed with the Darke County Auditor by the first Monday in March of the tax year (typically early March). Contact the Auditor's Office at (937) 547-7310 for specific requirements.
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Frequently Asked Questions
What is the deadline to appeal my property taxes in Darke County for 2026?
The deadline to file a property tax appeal in Darke County is March 31, 2026. This is a firm statutory deadline established by Ohio law with absolutely no extensions permitted under any circumstances. You can file your Board of Revision complaint anytime between January 1 and March 31, 2026 to challenge your 2025 tax year assessment. If you mail your appeal, it must be received by the Darke County Auditor's Office by March 31 or bear a U.S. Postal Service postmark of March 31 or earlier. Missing this deadline means you must wait until the next calendar year to file an appeal, so it's critical to gather your evidence and submit your complaint well before the deadline to avoid any last-minute issues.
How do I file a property tax appeal in Darke County?
To file a property tax appeal in Darke County, you must complete DTE Form 1 (Complaint Against the Valuation of Real Property) and submit it to the Darke County Board of Revision between January 1 and March 31. You can obtain the form from the Ohio Department of Taxation website or by calling the Darke County Auditor at (937) 547-7310. Include your parcel number, the current market value the Auditor has assigned, your opinion of the correct market value, and supporting evidence such as comparable sales, appraisals, or property condition issues. You can file by mailing the completed form to Darke County Auditor, Attn: Board of Revision, 504 S. Broadway, Greenville, OH 45331, or by delivering it in person during business hours (Monday-Friday, 7:30 AM - 4:00 PM). Before filing a formal appeal, consider requesting an informal review by calling the Auditor's office, as they may adjust your value without requiring a formal hearing.
What evidence do I need to win a property tax appeal in Darke County?
The strongest evidence for a successful property tax appeal in Darke County includes recent comparable sales of 3-5 similar homes in your neighborhood that sold for less than your assessed value within the past 12 months. If you purchased your home recently for less than the Auditor's current valuation, bring your closing statement, this is often dispositive evidence at Ohio Board of Revision hearings. Additionally, check your property record on the county auditor's website for factual errors in square footage, lot size, number of bedrooms or bathrooms, or property classification, as these mistakes are surprisingly common and can inflate your value. Photographs documenting property condition issues, repair estimates from licensed contractors, or a recent independent appraisal can also strengthen your case. Remember that Ohio assesses property at 35% of market value, so your evidence should focus on proving the market value is lower than what the Auditor determined.
How much can I save by appealing my property taxes in Darke County?
The amount you can save by appealing your property taxes in Darke County depends on how much your assessment is reduced and your local tax rate. With Darke County's effective tax rate of approximately 1.19%, every $10,000 reduction in your home's market value saves you approximately $42 annually (calculated as $10,000 × 35% assessment ratio × 1.19%). For example, if you successfully reduce your market value from $200,000 to $175,000 (a $25,000 reduction), you would save approximately $104 per year. Over a three-year period until the next triennial update, that's $312 in savings. Nationally, statistics show that about 25% of homes are unfairly overassessed and pay an average of $1,346 too much annually. Given that Darke County conducted its most recent countywide reappraisal in 2021, properties may be overvalued if local market conditions have softened or if errors occurred during the mass appraisal process.
What is the homestead exemption worth in Darke County?
The Ohio Homestead Exemption removes $29,000 of your home's market value from taxation for the 2026 tax year. Since Ohio assesses property at 35% of market value, this exemption reduces your assessed value by approximately $10,150. In Darke County, with an effective tax rate of 1.19%, the homestead exemption saves eligible homeowners approximately $120-$140 per year, though actual savings vary depending on your specific location within the county and which combination of taxing districts (schools, municipalities, townships) serve your property. To qualify, you must be age 65 or older by December 31 of the tax year, OR permanently and totally disabled, OR the surviving spouse of a public service officer killed in the line of duty. You must own and occupy the home as your primary residence and have an Ohio Adjusted Gross Income of $41,000 or less for 2026. Apply using DTE Form 105A with the Darke County Auditor by December 31.
What happens at a Board of Revision hearing in Darke County?
At a Darke County Board of Revision hearing, you will present your case before a three-member panel consisting of the County Auditor, County Treasurer, and President of the County Commissioners (or their appointed representatives). You will receive notice of your hearing date by certified mail at least two weeks in advance, so be sure to accept certified mail delivery. At the hearing, you will have approximately 15 minutes to present your evidence showing why your property's market value should be lower than the Auditor's determination. Bring all supporting documents including comparable sales data, appraisals, photographs, and any property record errors. The Board can only change your property's value, they cannot change tax rates or millage. After hearing your evidence, the Board will review the case and issue a written decision. If your appeal is successful, your property will be reassessed at the lower value. If denied, you have 30 days from the date of the Board's decision to appeal to the Ohio Board of Tax Appeals (file DTE Form 4) or to the Court of Common Pleas.
Can I appeal my property taxes if I just bought my home in Darke County?
Yes, absolutely, and a recent purchase can actually be your strongest piece of evidence for a successful appeal in Darke County. If you purchased your home within the past 12 months for less than the Auditor's current market valuation, bring your closing statement to your Board of Revision hearing. Ohio boards of revision frequently accept recent arm's-length purchase prices as dispositive evidence of true market value, especially if the sale was recent, the buyer and seller were unrelated, the property was marketed for a reasonable period, and there were no unusual circumstances affecting the sale price. For example, if you bought your home in 2025 for $165,000 but the Auditor values it at $180,000 for the 2025 tax year, your closing statement provides strong evidence that the market value should be $165,000. You still need to file your appeal between January 1 and March 31, 2026 using DTE Form 1, even though the purchase price seems like obvious proof of value.
How often does Darke County reassess property values?
Darke County follows Ohio's mandatory reappraisal cycle, which includes a full sexennial (six-year) reappraisal and a triennial (three-year) update at the midpoint. During the sexennial reappraisal, the County Auditor's office physically inspects and reappraises all properties to establish new market values based on current market conditions, comparable sales, construction costs, and property characteristics. At the three-year midpoint, the Auditor conducts a triennial update using statistical analysis and recent sales data to adjust values without physically inspecting each property. Darke County's most recent countywide reappraisal was completed in 2021, which means the next triennial update would occur in 2024 and the next full sexennial reappraisal in 2027. Assessment notices are typically mailed in the spring following a reappraisal or update year. Between reappraisal years, your assessed value generally remains the same unless you make improvements to your property or successfully appeal.
Travis Bunn·Updated July 25, 2026