Calculate Home Assessment Increase - Columbus, Ohio

Taxation and Finance Ohio 3 Minutes Read · published February 06, 2026 Flag of Ohio

Columbus, Ohio homeowners may see their property assessments change after county reappraisals or reported improvements. This guide explains how assessments are calculated, what to expect if your home assessment increases, and the practical steps to review, appeal, or correct an assessed value with local authorities. It focuses on the offices and procedures that apply to Columbus properties, who enforces assessment and tax rules, and which official forms and contacts to use to begin a review or appeal.

How assessments are calculated

In Franklin County, appraised value is based on comparable sales, replacement cost, and condition as determined by the county auditor; the auditor publishes valuation methods and reappraisal schedules for parcels within Columbus.[1]

Check the county auditor record for your parcel before assuming the increase is final.

Penalties & Enforcement

The assessment itself is not a fineable offence; enforcement arises when taxes based on assessment go unpaid or when false information is submitted. The auditor sets appraised values; tax collection and penalties for unpaid taxes are handled by the county treasurer. Specific monetary penalty rates or statutory fines for assessment-related violations are not specified on the cited page and must be confirmed with the collecting office.[3]

  • Monetary penalties: not specified on the cited page; delinquent tax interest and penalties are published by the treasurer.
  • Escalation: first, repeat, or continuing offences regarding tax delinquency are handled administratively or through the courts; specific escalation schedules are not specified on the cited page.
  • Non-monetary sanctions: tax liens, certificate sales, and judicial collection actions may follow unpaid taxes or fraudulent filings.
  • Enforcer and inspection: Franklin County Auditor enforces valuation methodology; Franklin County Treasurer enforces tax collection and posts delinquencies.
  • Appeals and review: property owners may file complaints or appeals with the county Board of Revision; see official guidance for filing windows and procedures.[2]
  • Defences and discretion: common defences include documented errors in property description, evidence of lower comparable sales, or permits showing a different property condition.
Keep deadlines in mind—appeal windows can be short and procedure-specific.

Applications & Forms

The county auditor and the Board of Revision publish the forms and instructions for informal complaints and formal appeals; if a particular form number is required it will appear on those official pages. If no form is required, the cited pages will state that explicitly.[1]

How-To

  1. Gather your property record card, recent sale notices, and photos of condition or improvements.
  2. Compare the auditor's comparable-sales and valuation notes for your parcel to local sales data.
  3. If you find discrepancies, submit an informal value complaint or the formal appeal to the Board of Revision per the board's instructions.[2]
  4. If an appeal is unsuccessful and taxes are unpaid, contact the treasurer to understand penalties and payment plans.
  5. Document all submissions and request written receipts; follow up if you do not receive confirmation.
Submit appeals early and keep copies of every form and supporting document.

FAQ

What triggers a reassessment?
Periodic county reappraisals, recent comparable sales, or reported physical changes to the property can trigger a change in assessed value.
How do I challenge my new assessment?
Review the auditor record, gather evidence, file an informal complaint or a formal appeal with the county Board of Revision within the board's stated deadlines.[2]
Will my taxes increase immediately if my assessment rises?
An increased assessment can lead to higher taxes when rates and levies are applied; contact the treasurer to see effect on billing and payment obligations.[3]

Key Takeaways

  • Verify the auditor's parcel record before appealing.
  • File within the Board of Revision deadlines and keep documentation.
  • Contact the treasurer early if higher taxes create payment issues.

Help and Support / Resources

  1. [1] Franklin County Auditor - Real Estate and Valuation
  2. [2] Franklin County Board of Revision information and forms
  3. [3] Ohio Department of Taxation

Categories

General Governance and Administration Public Safety Public Health and Welfare Land Use and Zoning Housing and Building Standards Transportation Environmental Protection Parks and Public Spaces Business and Consumer Protection Taxation and Finance Labor and Employment Education Civil Rights and Equity Elections and Campaign Finance Events and Special Uses Signs and Advertising Utilities and Infrastructure Technology and Data