How to Protest Your Texas Property Tax Valuation
Spring in Texas means bluebonnets, allergy season, and appraisal notices that make you squint at the mail. If your notice made you laugh, cry, or immediately text a friend, you’re in good company.
If you want a real answer on what your home is worth right now—not a Zillow fantasy, not a national average, not a random estimate—I can help.
In this post, I’ll walk you through:
how valuations are set,
how protests work,
how exemptions can reduce your tax bill, and
what to do before the May 15 deadline.
And if you want, I’ll send you a short video walkthrough of neighborhood comps you can use for planning or protest prep.
How Texas property valuations are made
Your County Appraisal District (for most of my local clients, that’s Hays CAD, and sometimes Comal CAD or Guadalupe CAD) estimates your property’s market value as of January 1 each year. They use mass appraisal methods (ratio studies, neighborhood groupings, trend factors) and compare sales patterns, property characteristics, and market trends.
That estimate then flows into:
Appraised market value = what CAD says your home is worth
Taxable value = what gets taxed after exemptions and limits are applied
Your tax rates are applied to the taxable value to calculate your tax bill.
Even if values rise county-wide, your specific value can still be challengeable if comps, condition, or property details are off.
For example: if your home is in a neighborhood where many homes are larger, on more acreage, or include features like a pool—and yours does not—your valuation may deserve closer review.
Texas is a non-disclosure state
Texas is a non-disclosure state, which means private home sale prices are not automatically reported to the state in one centralized public database.
In practice, that means appraisal districts have to assemble value evidence from multiple sources, and those inputs are broad by design. There was also local controversy around data access practices (including allegations reported by the San Marcos Record regarding unauthorized MLS data use by Hays CAD), which made many homeowners ask questions about how valuations are built.
As a real estate broker, I can access MLS-backed comparable sales data and pair it with hyper-local property insight (condition, upgrades, lot differences, and neighborhood trends) to create a more precise, property-specific value story. That’s the kind of evidence homeowners can use to strengthen a protest.
Why homeowners protest valuations
A protest is essentially saying:
“Based on market data and/or property facts, this valuation should be lower.”
Common reasons include:
Comparable sales used by CAD don’t match your home well
Condition issues weren’t considered (deferred maintenance, needed repairs, amenity differences)
Value increase is out of step with your specific neighborhood
Incorrect data appears in CAD records (size/features/etc.)
How to protest your taxes
Step 1: Review your notice and property record
Confirm basics first:
square footage
lot size
bed/bath count
material/condition notes
If the basics are wrong (for example, square footage or condition coding), that can support a protest.
Step 2: Pull relevant neighborhood comps
Use truly comparable recent sales whenever possible.
This month, I’m helping homeowners with short Comparative Market Analysis (CMA) video walkthroughs using RPR (Realtor Property Resource) + MLS history.
Step 3: File your protest online
Submit before the deadline (May 15 for Hays CAD) through your county’s official portal:
Hays CAD protest info: https://hayscad.com/protest/
Hays online appeal/property search: https://propertysearch.hayscad.com/
Comal CAD protest info: https://comalad.org/protest-information/
Comal online appeal portal: https://agentappeals.comalad.org/
Step 4: Organize your support
Helpful materials include:
recent comparable sales
photos of condition issues
concise notes tying evidence to your requested value adjustment
Examples of persuasive evidence:
Two nearby similar homes sold below your assessed value
Your home has original systems/finishes while recent comps were renovated
Lot/location/feature differences (no pool, less acreage, no view) justify a lower value
Step 5: Understand informal vs formal review
Informal review: You submit evidence and discuss value with CAD staff (often through the portal). Many cases resolve here.
Formal hearing (ARB): If informal results aren’t acceptable, you can present a concise, factual, evidence-based case to the Appraisal Review Board (Zoom or in person).
Double-check your exemptions
If you qualify and haven’t filed, filing your homestead exemption is one of the highest-impact steps you can take.
You can file homestead exemption yourself for your primary residence directly with CAD. Recent statewide changes increased homestead relief for many homeowners. If you haven’t filed, contact your CAD—you should be able to correct it and potentially receive retroactive benefit (often up to two years, depending on rules and timing).
The property tax protest process can feel confusing, but you don’t need to overcomplicate it. To lower your tax bill, start here:
understand your current valuation,
review your property record for errors,
compare truly relevant neighborhood sales,
file your protest before the deadline, and
present concise, evidence-based support.
In a non-disclosure state like Texas, clear local analysis is persuasive. Mass valuation models are broad by design, but your protest is strongest when it’s specific to your home and your neighborhood.
If you want help with that part, I’m offering short CMA video walkthroughs this month using local MLS-backed comp data and NAR Realtor Property Resource context so you can have the evidence you need to win your protest.
Reply with your address and I will send you a custom video walkthrough with comps you can use.
