What is the Ohio property tax assessment ratio?

Ohio law sets taxable value at 35% of market (true) value statewide, under Ohio Revised Code §5713.03. Your county auditor must use this ratio when calculating your tax bill.

How much is the Ohio Homestead Reduction in 2026?

For tax year 2026, the general Homestead Reduction shields $29,000 of market value for qualifying owners age 65+, totally disabled, or surviving spouses age 59+ with Ohio Adjusted Gross Income under $41,000. The enhanced amount for 100% disabled veterans and surviving spouses of public-safety officers killed in the line of duty is $58,000 with no income limit. File DTE Form 105A with your county auditor.

When is the Ohio Board of Revision deadline?

Ohio's statutory Board of Revision (BOR) complaint deadline is March 31 for the prior tax year, per ORC §5715.19. Complaints are filed using DTE Form 1 with your county auditor at no cost. Late filings are rejected except in very narrow clerical-error circumstances.

How much is the Ohio real property conveyance fee?

Ohio's conveyance fee has two parts: a mandatory $1.00 per $1,000 state fee (ORC §319.54(F)(3)) and a permissive county levy of up to $3.00 per $1,000 (ORC §322.02). Most Ohio counties charge the full $4.00 per $1,000. A separate $0.50 transfer fee applies per parcel. Filed using DTE Form 100 at the auditor's office at closing.

Who qualifies for Ohio's CAUV agricultural tax break?

Ohio's Current Agricultural Use Value (CAUV) program lets actively farmed land be taxed on its agricultural value rather than its market value. Eligibility requires 10+ acres devoted exclusively to commercial agriculture, or smaller parcels with $2,500+ in gross annual income from agriculture. Apply using DTE Form 109 and renew annually with DTE 109A. Removing land from CAUV triggers recoupment of three years of saved taxes under ORC §5713.34.

Union County Auditor Property Search (Ohio) Parcel Lookup, Tax Records, GIS Map & Owner Search

If you want to access Union County Auditor property records in Ohio, the official county tools provide accurate and reliable data. You can search parcel numbers, property ownership, tax records, and property values directly from government sources.

This guide gives you a step-by-step, practical walkthrough to use the official Union County Auditor website, GIS map, and tax systems effectively. Whether you are a buyer, investor, or property owner, this page will help you avoid common mistakes and find correct data quickly.

Quick Access – Union County Property Search Tools

🔎 Auditor Property Search
Parcel lookup & ownership 💳 Property Tax Info
Tax records & billing 🗺️ GIS Parcel Map
Interactive property map

How to Search Union County Auditor Property Records (Step-by-Step)

Go to official website → Open Union County Auditor
Click on “Property Search” or similar option
Enter one of the following:
- Owner name
- Parcel number
- Property address
View property details such as ownership, valuation, and tax history

✔ Pro Tip: Always use parcel number (APN) for the most accurate results.

Union County Auditor Property Search by Name

This method helps you find properties owned by a specific person.

Enter full owner name
Try last name first
Check spelling carefully

⚠️ Tip: Even small spelling errors may show no results.

Union County Parcel Number Lookup

Parcel number is the most reliable way to identify property.

Find parcel number on tax bill
Use it in search tool

Union County Property Search by Address

Enter simple address format
Avoid extra punctuation

💡 Insight: Address search may return multiple results.

Union County Property Tax Records

👉 Check Property Tax Records

View current tax bill
Check payment history

How to Pay Property Taxes in Union County Ohio

Visit official website
Locate tax payment section
Enter parcel details
Complete payment

Union County GIS Map Property Search

👉 Open GIS Map

View parcel boundaries
Check land details
Explore nearby properties

Property Value & Assessment in Union County

Type	Description
Assessed Value	Used for tax calculation
Market Value	Estimated sale value

How to Check Property Ownership

Search using parcel number or name
Verify ownership details

Common Problems & Solutions

Problem	Solution
No results	Use parcel number
Incorrect data	Verify spelling

Search Tips for Accurate Results

Use parcel number
Double-check spelling
Use official sources only

Union County Auditor Office Details

Office	Union County Auditor
Address	233 W 6th St, Marysville, OH
Phone	Verify from official website
Website	Official Website

Office Location Map

Frequently Asked Questions

How to search property records in Union County Ohio?

Use the official Union County Auditor website property search tool.

How to find parcel number?

Check your tax bill or use the Auditor search tool.

Can I search by name?

Yes, you can search using owner name.

How to pay property tax?

Use the official website payment section.

What is assessed value?

Value used for calculating taxes.

Why property not showing?

Check spelling or use parcel number.

Is search free?

Yes, official tools are free.

Who maintains records?

Union County Auditor.

How to use GIS map?

Use official GIS tool for parcel visualization.

How to contact office?

Visit official website.

Khushboo Bobade

Khushboo Bobade is the editor and digital publisher of CountyAuditors.org. She oversees the research and editorial process for the website, ensuring that information about county auditor offices, property records, and government resources is accurate, verified, and easy for visitors to understand.

Ohio Auditor Tools · Tax Year 2026

10 Ohio Property Tax Calculators & Auditor Tools

Built specifically for Ohio's 35% assessment ratio, current DTE forms, and 2026 Homestead, Owner-Occupancy, CAUV, Conveyance Fee, and Board of Revision rules. Every number reflects verified Ohio Department of Taxation amounts.

Homestead: $29,000 Enhanced Vet: $58,000 OAGI limit: $41,000 Assessment: 35% of market BOR filing: Free · DTE 1

Annual Tax Bill Estimator

OHIO

Applies Ohio's 35% assessment ratio plus your county's effective millage tier — the actual math your auditor uses.

County tier

Your effective rate (%)

Market (appraised) value ($)

Pick a county tier and enter your market value.

Homestead Reduction Calculator

DTE 105A

2026 Ohio Homestead: $29,000 general or $58,000 enhanced (100% disabled vet, KIA spouse). OAGI under $41,000 required for non-veteran applicants.

Exemption type

Home market value ($)

County effective rate (%)

Pick your situation and enter your home value.

Owner-Occupancy & Non-Business Credits

DTE 105C

Every Ohio owner-occupied home qualifies for the 2.5% Owner-Occupancy Credit plus the automatic 10% Non-Business Credit. Most owners don't realize these stack.

Current annual property tax ($)

Enter your annual tax to see both credit amounts.

Conveyance Fee Calculator

ORC 322

When you sell or transfer Ohio property, the auditor collects $1 state + up to $3 county per $1,000, plus $0.50 per parcel. Counties choose their rate.

Sale / consideration price ($)

County fee rate

Number of parcels

Enter sale price and pick your county rate.

CAUV Agricultural Savings

DTE 109

Ohio's Current Agricultural Use Value cuts taxable value dramatically for farmland (10+ acres, or smaller with $2,500+ annual gross income).

Market value of farmland ($)

CAUV value (from auditor) ($)

County effective rate (%)

Enter both market and CAUV values to see savings.

Mill Rate Converter

Ohio tax rates appear three ways on auditor sites: mills, percent, or dollars per $1,000. Convert between them instantly.

Convert from

Value

Enter a rate to see all three forms.

Parcel Number Cleaner

Ohio's 88 counties each format parcels differently — Franklin uses 010-123456-00, Cuyahoga uses 001-23-456, Hamilton uses 100-0001-0001-00. Auto-detects.

Parcel / APN / PIN

Paste any Ohio county parcel to format it.

35% Ratio Sanity Check

Ohio law sets taxable value at 35% of market value. If yours is significantly higher, you're a strong BOR appeal candidate.

Taxable value (from tax bill) ($)

Likely market value ($)

Enter both values to compare against Ohio's 35% target.

BOR Appeal Savings

DTE 1

A successful Board of Revision complaint typically cuts your value 10–20%. Filing is free and stays in effect until the next reappraisal.

Current annual tax ($)

Likely value reduction

Enter your tax bill and reduction estimate.

BOR Deadline Countdown

MAR 31

Ohio's statutory Board of Revision filing deadline is March 31 for the prior tax year. Miss it and you wait until next year — no extensions.

Filing deadline (default March 31)

Set your deadline to start the countdown.

Verify with the official Ohio source

These calculators use the verified 2026 Ohio Department of Taxation amounts and statutory rules. For your exact bill, exemption status, and county-specific deadlines, always confirm with your county auditor and the Ohio Revised Code:

Ohio Dept. of Taxation — Real Property DTE Forms (105A, 105C, 1, 109) ORC 5715 — Board of Revision ORC 5713 — Taxable Real Property ORC 322.02 — Conveyance Fee ORC 319.54(F)(3) — State Fee ORC 5713.30 — CAUV tax.ohio.gov — Main Portal

Estimates use Ohio's 35% statutory assessment ratio and effective tax rate tiers averaged across major Ohio counties. Your actual bill depends on local school levies, voted millage, inside vs. outside millage splits, House Bill 920 reduction factors (HB 920), and special assessments. The 2026 Homestead general amount ($29,000) and enhanced amount ($58,000) reflect HB 187 inflation indexing — your county auditor's office may show slightly different transitional figures. Nothing here is legal or tax advice. CountyAuditors.org is an independent informational directory, not affiliated with any county government.