Challenge an over-assessed property value in Ohio. Generate a state-specific demand letter citing R.C. 5715.19 deadlines and county auditor procedures.
Generate My Letter — $19If your Ohio property has been over-assessed by the county auditor, you are paying more in property taxes than the law requires. Ohio law gives every property owner the right to challenge the auditor's valuation through a formal Complaint Against the Valuation of Real Property filed with the county Board of Revision. Before filing, a well-drafted demand letter to the county auditor or assessor can sometimes resolve obvious errors—like incorrect square footage, wrong lot size, or comparable sales mistakes—without a formal hearing. Because Ohio uses a strict March 31 filing deadline and reassesses property on a fixed three-year and six-year cycle, acting quickly matters. This page explains how Ohio's assessment law works and how a demand letter fits into the appeal process.
Ohio property taxes are based on the county auditor's appraisal of your property's true value in money, which is then reduced to a 35% assessed value under Ohio Revised Code § 5715.01. Counties conduct a full reappraisal every six years and a triennial update every three years, with values set as of January 1 of the tax lien date. If you believe the auditor's value exceeds the property's actual fair market value, R.C. § 5715.19 allows you to file a Complaint Against the Valuation of Real Property (Form DTE 1) with the county Board of Revision (BOR). The BOR is a three-member panel consisting of the county auditor, treasurer, and a member of the board of county commissioners (or their designees). At the hearing, the property owner bears the burden of proving the correct value. Acceptable evidence includes a recent arm's-length sale of the subject property, a licensed appraisal, comparable sales of similar nearby properties, income and expense data for rental properties, or documentation of physical defects that reduce value. Under Ohio Supreme Court precedent, including Berea City School District v. Cuyahoga County Board of Revision, a recent arm's-length sale is the best evidence of value. School districts and other taxing authorities may file counter-complaints to defend the existing valuation, particularly when the requested reduction exceeds $50,000 in value under R.C. § 5715.19(B). Decisions of the BOR can be appealed to the Ohio Board of Tax Appeals under R.C. § 5717.01 within 30 days, or to the county court of common pleas under R.C. § 5717.05.
A demand letter in Ohio assessment disputes serves two purposes: it creates a paper record of your good-faith effort to resolve the over-assessment, and it can prompt informal correction by the auditor's office before the BOR process begins. Many Ohio county auditors maintain informal review procedures where staff will re-examine the appraisal record if you submit credible evidence of error. Your letter should be addressed to the county auditor and clearly identify the parcel by parcel number, owner name, and property address. State the auditor's current value, the value you believe is correct, and the basis for that opinion—attach copies of any appraisal, comparable sales, closing statement from a recent purchase, or photographs documenting condition issues. Cite R.C. § 5715.19 and request that the auditor either correct the value administratively or confirm in writing that you must proceed to the Board of Revision. Set a reasonable response deadline (typically 14 to 21 days) that still leaves time to file Form DTE 1 before the March 31 statutory cutoff. Keep the tone factual and professional; the same letter and exhibits often become the foundation of your BOR complaint and any later appeal to the Board of Tax Appeals. Sending by certified mail with return receipt preserves proof of delivery.
There is no filing fee to submit Form DTE 1 to the county Board of Revision in Ohio. Complaints must be filed between January 1 and March 31 of the tax year following the lien date you are challenging. Only one complaint per triennium is generally permitted under R.C. § 5715.19(A)(2) unless an exception applies, such as a recent sale, substantial improvement, or casualty loss. Appeals to the Ohio Board of Tax Appeals must be filed within 30 days of the BOR decision. Small claims court is not available for property tax assessment disputes—Ohio's $6,000 small claims limit does not apply because exclusive jurisdiction lies with the BOR. Property owners may represent themselves; corporations and LLCs may also self-represent at the BOR level under recent Ohio law changes.
Property tax in Ohio is governed by the Ohio Revised Code Title 57 (Taxation) — real property valuation, complaints, and appeals (Chapters 5715, 5717, 5721) (Ohio Rev. Code §§ 5715.01, 5715.19, 5717.01; Ohio Admin. Code 5703-25-05). Assessment cycle: Six-year cycle: a full reappraisal every 6 years with a triennial update at the 3-year midpoint. Property is valued as of the tax lien date (January 1). Assessed value: 35% — the taxable (assessed) value of each parcel is 35 percent of true value in money (ORC § 5715.01; OAC 5703-25-05).
County Board of Revision (first level) and the Ohio Board of Tax Appeals (state administrative appeal); county auditors administer valuations. The Ohio Department of Taxation oversees property tax administration statewide. The window to act is short — march 31 of the following tax year to file a valuation complaint (DTE Form 1) with the county Board of Revision — a firm statutory cutoff. To appeal a Board of Revision decision to the Board of Tax Appeals, a notice of appeal must be filed within 30 days after the BOR's decision is mailed (ORC 5717.01).
A recent change to watch: As of 2025-2026, House Bill 493 proposes ending the sale of delinquent tax liens to third parties, and the Ohio Senate has advanced a Homestead Exemption expansion. (Reform proposals — not yet enacted as of 2026-07-22.).
How your value is assessed: 35% — the taxable (assessed) value of each parcel is 35 percent of true value in money (ORC § 5715.01; OAC 5703-25-05).
Evidence that works: Recent sale price of the subject property, comparable sales, independent appraisals, income/expense data for income-producing property, and photographs of condition/defects.
Appeal deadline: March 31 of the following tax year to file a valuation complaint (DTE Form 1) with the county Board of Revision — a firm statutory cutoff. To appeal a Board of Revision decision to the Board of Tax Appeals, a notice of appeal must be filed within 30 days after the BOR's decision is mailed (ORC 5717.01).
First-level appeal: County Board of Revision (BOR) — file a DTE Form 1 complaint against valuation. The BOR is composed of the county auditor, county treasurer, and a county commissioner. An informal review with the County Auditor is often available first.
Next-level appeal: Ohio Board of Tax Appeals (BTA) under ORC 5717.01, appealed within 30 days of the BOR decision mailing. Further review may be taken to the Court of Appeals / Ohio Supreme Court.
Grounds you can raise: The appraised/true (market) value assigned by the county auditor is incorrect (too high or too low). You cannot challenge the 35% assessment ratio itself — only the underlying true value.
Exemptions to claim: Homestead Exemption for seniors (65+) and permanently disabled homeowners: exempts the first $26,200 of home value (income-tested; OAGI $38,600 or less for first-time qualifiers in 2024). Enhanced Homestead for disabled veterans (100% service-connected): exempts the first $52,300 of value. Surviving-spouse exemption for spouses of public safety personnel killed in the line of duty.
The hearing: Administrative hearing before the county Board of Revision where the owner and auditor present evidence; the BOR issues a written decision. BTA appeals are heard de novo.
First, county Board of Revision (BOR) — file a DTE Form 1 complaint against valuation. The BOR is composed of the county auditor, county treasurer, and a county commissioner. An informal review with the County Auditor is often available first.
If that fails, ohio Board of Tax Appeals (BTA) under ORC 5717.01, appealed within 30 days of the BOR decision mailing. Further review may be taken to the Court of Appeals / Ohio Supreme Court.
Mind the deadline: march 31 of the following tax year to file a valuation complaint (DTE Form 1) with the county Board of Revision — a firm statutory cutoff. To appeal a Board of Revision decision to the Board of Tax Appeals, a notice of appeal must be filed within 30 days after the BOR's decision is mailed (ORC 5717.01).
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