Hundreds of thousands of Texas homes are never visited by an appraiser. Their values are set by computer models that crunch sales data across whole neighborhoods at once — a process called mass appraisal. A group of Denton County property owners argued that their appraisal district ran those models in violation of the professional standards state law points to, and they took the fight all the way to the Texas Supreme Court.
They lost — at every level. On May 8, 2026, the Supreme Court of Texas denied their last motion, closing the case for good. Here is what they argued, why the courts threw it out, and what the outcome means for any homeowner who thinks their appraisal was done wrong.
What the law actually requires
When your county appraisal district values your property, the Texas Tax Code tells it how. Section 23.01(a) says market value “shall be determined by the application of generally accepted appraisal methods and techniques.” And Section 23.01(b) adds a specific rule for the computer-driven approach:
“If the appraisal district determines the appraised value of a property using mass appraisal standards, the mass appraisal standards must comply with the Uniform Standards of Professional Appraisal Practice.”
The Uniform Standards of Professional Appraisal Practice — USPAP — are the national rulebook for appraisers, published by The Appraisal Foundation. The Tax Code expressly names USPAP as one of the “generally accepted” authorities districts are supposed to follow (Tax Code § 23.01(c)). So on paper, Texas law and professional appraisal standards are linked.
The question the Denton County case asked was a sharp one: if a district doesn’t follow USPAP in its mass appraisal, can a homeowner sue to force it to — and get their taxes refunded?
The case: Vexler v. Denton Central Appraisal District
In October 2023, Mitch and Catherine Vexler, the Solinskis, and a Flower Mound business filed suit in the 481st District Court of Denton County against the Denton Central Appraisal District and its chief appraiser, Don Spencer (The Texan, 2023).
Their core allegation was that the district set values through a mass-appraisal system that did not comply with USPAP, and they asked the court for two things: a refund of taxes they said were wrongly collected, and an injunction stopping the district from doing it again. They also asked the court to declare the statute that ties appraisal to USPAP unconstitutional.
Important caveat: no court ever ruled on whether Denton’s appraisals actually violated USPAP. As you will see, the case never reached that question. The “manipulation” claim is what the property owners alleged — not a judicial finding.
Why the courts threw it out
The trial court dismissed the suit for lack of jurisdiction. On May 1, 2025, the Second Court of Appeals in Fort Worth affirmed that dismissal in a memorandum opinion by Justice Elizabeth Kerr (Vexler v. Spencer, No. 02-24-00305-CV). The reasoning came down to one principle that every Texas homeowner should understand.
The Tax Code’s remedy is the only remedy
Texas law gives property owners a specific, exclusive path to challenge a value: first protest to the Appraisal Review Board (ARB) under Chapter 41 of the Tax Code, then — if still unsatisfied — seek judicial review of the ARB’s order under Chapter 42. Section 42.09 makes those procedures the exclusive way to contest an appraisal.
The court found the Denton owners had tried to sidestep that system. They did not allege that they were seeking judicial review of their own ARB orders; instead they brought free-standing claims attacking how the district applied the Tax Code generally. Because they bypassed the exclusive process, the court held it had no jurisdiction to hear them — and because appraisal districts are governmental units protected by immunity, there was no other door in.
No standing to attack the statute
The owners’ constitutional challenge to Section 23.01(b) fared no better: the court held they lacked standing to bring a facial challenge to the Legislature’s reference to USPAP. The merits of whether Denton followed USPAP were never decided — the case ended on the threshold question of who can sue, how, and where.
The Supreme Court declined twice
The owners petitioned the Texas Supreme Court, hoping it would clarify whether districts must strictly comply with USPAP. The Court was not persuaded:
- October 24, 2025 — the Supreme Court of Texas denied the petition for review in No. 25-0615.
- November 24, 2025 — the owners filed a motion for rehearing.
- May 8, 2026 — the Court denied the motion for rehearing, ending the case (docket No. 25-0615).
A denial of review is not the Supreme Court blessing the appraisal district’s methods. It means the Court let the lower court’s jurisdictional ruling stand without weighing in. The USPAP-compliance question itself remains legally untested.
What this means for your own appraisal
The practical lesson is blunt: you cannot skip the protest system. If you believe your value is wrong — even badly, systemically wrong — Texas courts have made clear that the route is the one the Tax Code lays out, not a stand-alone lawsuit over appraisal methodology.
That route is real, and it works for many homeowners every year:
- File a protest with your ARB by the deadline on your appraisal notice — generally May 15 or 30 days after the notice is mailed, whichever is later. The notice itself tells you the date; miss it and you usually lose the year.
- Bring evidence specific to your property — comparable sales, photos of condition issues, an independent appraisal. The Tax Code requires each property to be valued on “the individual characteristics that affect the property’s market value,” so individual evidence matters.
- If the ARB rules against you, you can appeal under Chapter 42 to district court, to binding arbitration, or (for some properties) to the State Office of Administrative Hearings.
- Watch the watchdog. The Comptroller’s Property Tax Assistance Division reviews appraisal-district performance through its biennial Methods and Assistance Program — a check on appraisal quality that exists outside the courtroom.
In Denton County, where the 2025 county rate alone is $0.1859 per $100 of value before school and city rates are added on, getting an appraisal right is worth real money. The Vexler case shows the courthouse is not a shortcut to that — the protest deadline on your notice is.
Sources
- Texas Tax Code § 23.01, Appraisals Generally (FindLaw) — mass appraisal must comply with USPAP.
- Texas Tax Code § 42.09, Remedies Exclusive (FindLaw).
- Vexler v. Spencer, No. 02-24-00305-CV (Tex. App.—Fort Worth May 1, 2025, pet. denied) (mem. op.).
- Supreme Court of Texas, Orders of October 24, 2025 — petition denied, No. 25-0615.
- Supreme Court of Texas, Orders of May 8, 2026 — motion for rehearing denied.
- SCOTXblog docket, No. 25-0615 — full case history.
- The Texan, “Taxpayer Lawsuit Against Denton Central Appraisal District Loses on Appeal”.
- Texas Comptroller — Property Tax Rates & Levies (Denton County 2025 adopted rate).