Texas property tax protests are decided on evidence — specifically three categories of evidence. Knowing what works (and what doesn't) is the difference between a successful reduction and a wasted afternoon at an ARB hearing.
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Every successful Texas property tax protest leans on one or more of three categories. The strongest cases combine all three. Each maps to a separate legal argument: comparable sales drive market-value protests; an unequal-appraisal analysis drives equity protests; and condition documentation undermines the mass-appraisal model's baseline assumptions.
Recent transactions of similar nearby homes are the single most persuasive evidence in a market-value protest. The CAD's own appraisers value properties by looking at comps — so when you bring better comps than they brought, they're forced to engage on the merits.
What makes a strong comp:
The Texas Constitution requires that taxation be equal and uniform. If your home is appraised higher than the median of similar peers, the ARB is legally required to reduce your value — even if the appraisal is technically defensible against current market value.
Unequal-appraisal analysis is statistical: pull the assessed values of properly-adjusted comparable peers, compute the median, and compare your value against it. The argument doesn't depend on what the broader market is doing. Many homeowners win equity reductions even in rising markets where pure market-value evidence is mixed.
Mass appraisal models assume your property is in baseline 'good' condition. When it isn't — foundation cracks, dated interiors, roof age, HVAC issues, deferred maintenance — that gap between assumed and actual condition is a direct argument for a reduction.
What works for condition evidence:
Texas Tax Code recognises two independent legal grounds. For any given property, the data may support one, both, or neither — running the analysis up front is the only way to know which to elect:
| Dimension | Market value | Unequal appraisal (equity) |
|---|---|---|
| Legal basis | Texas Tax Code Chapter 41 — appraised value must not exceed market value | Texas Constitution Article VIII — taxation must be "equal and uniform" across similar properties |
| Evidence required | 3–5 adjusted comparable sales of similar nearby homes, ideally within 6–12 months of January 1 | Statistical median of properly-adjusted appraised-value peers, computed across the right comparable set |
| Argues your value | Exceeds market — buyers won't pay this much | Is higher than peers — even if the market would pay it, your specific value is unfair relative to similar properties |
| ARB outcome if you win | Value reduced toward your supported market estimate | ARB is required to reduce your value to the peer median |
| Works best when | Nearby comps closed at meaningfully lower prices than your CAD value | Similar peers in your neighborhood are consistently assessed below you (works even in rising markets) |
| Most common failure mode | Stretched comps the CAD's appraisers can rebut | Wrong peer set (too few rows, wrong filter — the statistical argument falls apart at the median calculation) |
File both grounds on the protest form when the data supports it — at the hearing you can lead with whichever is stronger.
ARB panels and CAD appraisers see thousands of cases. They've calibrated against the common arguments that don't move the needle. Save your time:
Our Full Reports compile categories 1 and 2 — the comparable-sales analysis and the unequal-appraisal equity analysis — into a single PDF you can submit to your appraisal district. Specifically, our reports include:
Category 3 — condition documentation — is yours to assemble. Your report and your condition documentation together make the strongest case. Combined: $99/year on subscription, $179 for a single one-time report.
Three to five strong comps usually suffice — the panel is more persuaded by quality than quantity. A single excellent comparable sale (very similar home, same neighborhood, sold within the last six months) can outweigh a dozen weak ones. The CAD's appraisers will quickly point out flaws in obviously-stretched comparables, so curate carefully.
AVM (automated valuation model) estimates from Zillow, Redfin, or similar sites carry essentially zero weight in a Texas appraisal hearing. ARB panels know these are statistical guesses, not actual transactions. Use real recorded sales — the same data the CAD itself uses. Sales are public records; we pull them straight from county-recorded transactions for our reports.
The most persuasive comparable sales closed within 6 to 12 months of January 1 of the tax year — that's the date Texas Tax Code values your property as of. Older comps can still work in stable markets but are easier for the CAD to challenge as 'no longer reflective of current value.' Recent post-January-1 sales can also be useful if the market has moved meaningfully since the appraisal date.
Yes — when paired with written repair estimates from licensed contractors. A photo alone tells the panel something is wrong; a contractor's estimate quantifies the gap between assumed and actual condition. Time-stamped photos showing dated kitchens, foundation cracks, roof age, or HVAC issues work especially well because mass appraisal models assume baseline 'good' condition.
An unequal-appraisal analysis is a statistical comparison of your home's appraised value against a sample of comparable peers — and if your value is higher than the median of properly-adjusted comps, the ARB is required to reduce yours to the median. The Texas Constitution requires that property taxation be equal and uniform, which is the legal basis for this kind of protest. It frequently wins reductions even when market-value evidence is mixed because it doesn't depend on market conditions.
The statistics on this page are best-effort aggregates compiled from public county appraisal-district records as of the data extract date noted above. We update them periodically; we cannot guarantee they reflect the most recent appraisal-roll certifications, post-extract value changes, or supplemental records.
Always verify deadlines, portal availability, and contact details with your county's central appraisal district before filing — the links to each county's official site are provided above.
The information on this page is provided for general educational purposes only. It is not property-tax advice, legal advice, or financial advice. Property tax law and appraisal-district procedures change; for guidance specific to your situation you should consult a qualified professional.
Looking up an address through this site or generating a free estimate does not create a customer relationship with Protesting Property Taxes. You become a customer of our service when you purchase a report.
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