PROPERTY TAX APPEAL EVIDENCE

What Evidence You Need to Win Your Property Tax Appeal

Building a strong case starts with the right evidence. Learn what assessors look at, what strengthens your appeal, and what mistakes can sink it.

TYPES OF EVIDENCE

The Four Pillars of a Strong Property Tax Appeal

Assessors use three standard approaches to value commercial property — and your evidence needs to address them directly. Learn more about how commercial properties are assessed.

Comparable Sales Data

Recent sales of similar properties in your area that sold for less than your assessed value. The market approach is the most intuitive way to show your assessment is too high.

Income & Expense Records

Your actual rental income, operating expenses, vacancy rates, and NOI. The income approach is typically the strongest evidence for commercial properties.

Property Condition Documentation

Photos, inspection reports, and repair estimates that document deferred maintenance, functional obsolescence, or physical deterioration the assessor may not know about.

Vacancy & Occupancy Data

Current and historical occupancy rates, lease expirations, and market vacancy comparisons. High vacancy directly reduces your property's income — and its value.

STEP BY STEP

How to Build Your Evidence Package

Gathering the right evidence takes preparation. Follow these steps to build a case that assessors and tribunals take seriously.

Gather Your Assessment Notice & Tax Bills

Start with your current assessment notice. Compare the assessed value to what you believe your property is actually worth. Pull tax bills from the last 2-3 years to show how your taxes have changed.

Compile Income & Expense Statements

Collect 2-3 years of profit and loss statements, rent rolls, and operating expense reports. Make sure they're clean, consistent, and accurately reflect your property's financial performance.

Research Comparable Sales

Identify recent sales of similar properties in your market — same property type, size, age, and location. Focus on sales that closed below your assessed value per square foot.

Document Property Condition Issues

Photograph deferred maintenance, structural issues, or obsolete features. Get repair estimates from contractors. These costs directly reduce your property's value under the cost approach.

Organize and Present Your Case

Compile everything into a clear, logical package. Lead with your strongest evidence. A well-organized submission signals credibility and makes it easier for the assessor or tribunal to rule in your favor.

WHAT WORKS

Evidence That Strengthens Your Case

Not all evidence carries equal weight. These items consistently produce the strongest results in commercial property tax appeals.

Certified rent rolls showing actual rental rates vs. market rates

2-3 years of audited or verified income and expense statements

Comparable sales within 12 months and 5 miles of your property

Professional appraisal from a licensed MAI appraiser

Photos and contractor estimates for deferred maintenance

Market vacancy data showing your area's occupancy trends

Cap rate analysis using current market cap rates

WHAT TO AVOID

Common Evidence Mistakes That Hurt Your Appeal

These mistakes can weaken or even sink your case. Avoid them to give your appeal the best chance of success. For a full walkthrough, see our guide to the appeal process.

Submitting incomplete or inconsistent financial records

Using comparable sales that are too old or too far away

Confusing assessed value with market value or insured value

Missing the filing deadline — no evidence matters if you file late

Arguing based on opinion rather than data and documentation

Ignoring what the assessor will argue against you

PROFESSIONAL ADVANTAGE

Why Professional Evidence Preparation Matters

The difference between a successful appeal and a denied one often comes down to how evidence is gathered, organized, and presented. Experienced property tax consultants know exactly what each tribunal expects — and what assessors will challenge.

Access to commercial sales databases and market data most owners can't get

Experience preparing evidence packages that meet tribunal standards

Knowledge of which evidence carries the most weight in your jurisdiction

Contingency fees mean no cost unless your appeal produces savings

Professional reviewing property tax appeal evidence

For commercial properties, income and expense data is typically the strongest evidence. Assessors value commercial properties based on their income-generating potential, so demonstrating that your actual NOI supports a lower value is the most direct way to prove over-assessment.

Most tribunals and boards of revision want to see at least two to three years of income and expense statements. This shows trends over time and demonstrates that your numbers are consistent, not just a one-year anomaly.

Yes, a professional appraisal from a licensed MAI appraiser can be powerful evidence. However, it must be conducted according to USPAP standards and use methodology the tribunal or board will accept. Not all appraisals are created equal — one that uses the wrong approach or outdated data can actually hurt your case.

When comparable sales are limited — common for specialized properties like medical facilities or industrial plants — the income approach becomes even more important. Your actual income and expense data, combined with market cap rates, can establish value without relying on comparable sales.

For larger commercial properties or cases heading to a formal tribunal hearing, an expert witness (typically an MAI appraiser) significantly strengthens your case. For smaller cases or informal board hearings, well-organized financial data and comparable sales may be sufficient.

Assessors will cite their own comparable sales, cost tables, and market data. They may also point to your property's sale price if you purchased recently, any improvements you've made, or higher rental rates at nearby properties. Knowing what the assessor will argue helps you prepare effective counter-evidence.

RELATED RESOURCES

More Property Tax Appeal Resources

How to Appeal Commercial Property Taxes — Step-by-step guide

How Much Does a Property Tax Appeal Cost? — Fee structures explained

2026 Property Tax Appeal Deadlines — Filing dates for MI, IN, and OH

Michigan Property Tax Appeals — Tax Tribunal representation

Ohio Property Tax Appeals — Board of Revision representation

Industrial Property Tax Appeals — Warehouses, plants, and distribution centers

NOT SURE IF YOUR EVIDENCE IS STRONG ENOUGH?

Get a Free Assessment Review

We'll review your assessment, evaluate your evidence, and tell you if an appeal makes sense — before you spend a dime. No fee unless we save you money.

Government building representing property tax appeal evidence submission