Evidence Types That Win Commercial Property Tax Protests in Texas

The protest is filed. The hearing is scheduled. Now the question is: what do you bring?

Texas commercial property tax protests are won or lost on evidence. The appraisal district has its own evidence — the mass appraisal model, property record cards, comparable sales databases, and income approach worksheets. Your job is to present evidence that is more accurate, more specific, and more persuasive than what the district has. Not every property has the same evidence available, but every successful protest strategy starts with understanding which types of evidence carry weight and why.

This guide covers the seven major evidence categories that consistently produce results at Texas Appraisal Review Board hearings and informal hearings.

Actual Income and Expense Documentation

For income-producing commercial properties — retail, office, industrial, medical, hospitality — nothing beats actual financial data. A certified rent roll, actual net operating income calculation, and documented operating expenses from the trailing 12 to 24 months are often the single most powerful evidence set available for a commercial protest.

Why actual income data works: the appraisal district’s income approach uses estimated market rents, assumed vacancy rates, and standardized expense ratios. Your actual data reflects what the property genuinely produces — which is what a knowledgeable buyer would actually pay for it under Texas Tax Code §23.01.

What to gather:

• Rent roll: every tenant, square footage leased, monthly rent, lease term, expiration date
• Vacancy documentation: vacant square footage, dates spaces became vacant, efforts to lease
• Operating expenses: maintenance, insurance, management fees, utilities, repairs, capital expenditures
• Actual net operating income calculation for the trailing 12 months
• Comparison to prior year if revenue declined

How it’s used at the hearing: Present the income analysis as a formal income approach valuation. Calculate value by dividing actual stabilized NOI by an appropriate market cap rate for your property type and location. If the resulting value is below the assessed value, that’s your market value protest argument.

The district will challenge your cap rate selection. Come prepared with market cap rate evidence — broker surveys, CoStar data, published appraisal reports for your property type in comparable markets. A cap rate argument is winnable when you have documented support.

Comparable Sales Data

The sales comparison approach is the most commonly understood form of evidence, but it is frequently misapplied in protest proceedings. Presenting comparable sales that are not genuinely comparable — wrong property type, wrong location, wrong condition, wrong time frame — gives the district an easy rebuttal.

Effective comparable sales evidence requires:

True similarity in property type. An office building sale is not a comparable for your retail strip center. A Class A warehouse sale is not a comparable for your Class B industrial building with limited dock access. Match the property type, construction class, and physical characteristics as closely as possible.

Location comparability. Location drives a large portion of commercial value. A sale on a major arterial with 35,000 vehicles per day is not comparable to your property on a secondary street with 8,000 vehicles per day without significant downward adjustment. Traffic count data (available from TxDOT) supports this adjustment.

Time frame currency. Comparable sales should generally be within 12 to 24 months of the January 1 appraisal date. Older sales from a different market cycle — either the post-pandemic boom or a pre-correction peak — are less persuasive and easier for the district to challenge. If you must use older sales, apply a market condition adjustment supported by market trend data.

Arm’s-length transactions. Sales between related parties, foreclosure sales, estate sales, and sales involving unique seller motivations are not reliable comparable sales. If you can identify these transaction types in the district’s comparable data, challenge them specifically.

Gathering comparable sales for Texas counties: The county appraisal district’s website typically provides sales data for recently sold properties. CoStar, LoopNet, and local commercial brokers can provide additional data. For rural counties with thin transaction histories, you may need to look at comparable counties with similar economic profiles.

Equity Comparables from the County Appraisal Roll

This evidence type is underutilized — and often decisive.

Texas Tax Code §41.43(b)(3) provides that an appraisal is unequal if the subject property’s appraisal ratio exceeds the median appraisal ratio of a reasonable and representative sample of other properties in the appraisal district, or if the subject’s appraisal ratio exceeds the appraised value of the subject property using the median level of appraisal of comparable properties.

In plain English: if similar properties in your county are assessed at lower per-square-foot values than yours, the law entitles you to a reduction to the level of those comparable properties — even if the district’s absolute value for your property is arguably defensible.

How to pull equity comparables:

1. Access your county appraisal district’s public property search
2. Search for properties of similar type, size, age, and general location
3. Note their assessed value per square foot
4. Compare those figures to your property’s assessed value per square foot
5. If yours is higher, prepare a table showing the comparison

This evidence is particularly effective in counties where the appraisal district has been inconsistent in applying value updates — which is common when districts conduct partial reassessments rather than county-wide reviews.

Property Condition Documentation

Physical condition directly affects market value, but county appraisal districts cannot inspect every commercial property every year. Many properties in the district’s records reflect condition assessments that are years or even decades old. If your property has experienced physical deterioration, deferred maintenance, or damage since the last inspection, the district’s condition rating may be overstated.

Evidence that documents condition:

• Photographs with timestamps showing visible deterioration, deferred maintenance, damaged systems
• Contractor estimates for needed repairs — specific dollar amounts for roof replacement, HVAC repair, structural issues, parking lot repair
• Engineer or inspector reports documenting structural or systems deficiencies
• Insurance loss history for events that caused unremediated damage

How it’s used at the hearing: Physical condition reduces value through functional obsolescence (the cost to correct deficiencies) and economic depreciation. Present the photographs and contractor estimates alongside the cost approach to show that the district’s depreciation is understated.

Appraisal Report from a Certified Appraiser

For commercial properties with significant value — generally above $1 million — a formal appraisal report from a Texas-licensed MAI appraiser is the gold standard evidence at an ARB hearing. An independent appraisal report carries significant weight because:

• It is prepared by a credentialed professional subject to USPAP standards
• It includes a comprehensive analysis of all three approaches to value
• It provides a supportable, documented opinion of market value that the ARB must take seriously
• It demonstrates that the property owner invested in professional analysis — signaling that the protest is serious

The cost of an independent appraisal report typically ranges from $2,500 to $8,000 for commercial properties, depending on size and complexity. This cost is justified when the potential tax savings are substantial — for a $5 million property where a 15% overassessment means $30,000 in annual savings, the appraisal cost represents a small fraction of the first-year benefit.

Even if you don’t obtain a full appraisal report, a desktop review or letter of opinion from a licensed appraiser can provide credible support for your protest position at lower cost.

Vacancy and Market Absorption Data

For commercial properties experiencing significant vacancy, documenting the vacancy and its market context is essential protest evidence.

Texas Tax Code §23.01 defines market value as the price a property would sell for in an arm’s-length transaction between a knowledgeable buyer and seller. A buyer acquiring a partially vacant commercial property discounts the purchase price to reflect:

• Lost rental income during vacancy
• Lease-up costs (broker commissions, tenant improvement allowances, free rent periods)
• Uncertainty about future tenancy
• The possibility that market conditions preventing current leasing may persist

These discounts are quantifiable. A professional income analysis models the lease-up period as a discounted cash flow, producing a present value that reflects the actual risk-adjusted income the property will generate — which is lower than the stabilized income the district assumes.

Market absorption data from CoStar, local brokerage market reports, or CBRE/JLL market reports supports the argument that your vacancy is a market condition, not an anomaly specific to your management. If the overall market in your county or metro area shows elevated vacancy for your property type, that market data supports the reduction you are seeking.

Prior Sale Price

If you purchased your commercial property within the past two to four years in an arm’s-length transaction, your acquisition price is direct evidence of market value. The Texas Property Tax Code does not make purchase price determinative of assessed value, but a recent arm’s-length sale is among the strongest single data points available.

When purchase price helps: If you paid $800,000 for a property currently assessed at $950,000 in an arm’s-length transaction, your purchase is strong evidence that the assessed value exceeds market value. The district must explain why the value should be higher than what a willing buyer paid for the property with full knowledge of its condition and income.

When purchase price doesn’t help: If you paid well above assessed value (a common scenario in the 2021–2022 commercial real estate boom), the purchase price works against you. In that case, focus on current market conditions and income analysis rather than acquisition price.

Documenting the transaction: Provide the closing statement or HUD-1, any third-party appraisal obtained during financing, and confirmation that the transaction was arm’s-length (between unrelated parties, at market terms, without unusual motivations).

Putting Evidence Together for Your Texas County Protest

The most effective commercial tax protest presentations organize evidence into a clear package with:

1. A one-page executive summary stating the protested value, the basis for the protest (market value, unequal appraisal, or both), and the key evidence
2. The income approach analysis with all supporting data
3. Comparable sales with a summary adjustment table
4. Equity comparables from the county roll
5. Condition documentation
6. Any independent appraisal or letter of opinion

Each piece of evidence should be clearly labeled and organized so ARB members — who may review dozens of protests in a single day — can follow your argument without confusion.

For county-specific guidance, see our pages for Harris County, Dallas County, and Tarrant County — Texas’s largest commercial markets, where evidence quality is especially important. For the complete filing and hearing process, see our how-to-protest guide.

Ready to build a strong evidence package for your Texas commercial property protest? Contact LowerMyCommercialTax.com — we work on contingency, so you pay nothing unless we save you money.

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About the Author

Mike VanVickle is the founder of LowerMyCommercialTax.com, helping Texas commercial property owners reduce their tax burden through professional protest representation. With deep expertise in Texas property tax law and appraisal district processes, Mike and his team have helped property owners across all 254 Texas counties achieve meaningful reductions on a contingency basis — no savings, no fee.

Sources & References

• Texas Comptroller of Public Accounts — Property Tax System Basics
• Texas Property Tax Code, Title 1, Subtitle D — Tax Code §41.41
• Texas Property Tax Code §23.01 — Market Value Standard
• Texas Property Tax Code §41.43(b)(3) — Unequal Appraisal Standard
• Appraisal Foundation — Uniform Standards of Professional Appraisal Practice (USPAP)
• Texas Taxpayers and Research Association — Property Tax Reports

This guide was last reviewed and updated on May 22, 2026. Tax rates, deadlines, and procedures are subject to change. Consult your county appraisal district for the most current information.