Will a Data Center Next Door Lower My Property Value?

A Texas Landowner’s Guide to Diminished Value, Stigma, the Proof That Actually Wins, and What Happens When You Sell

You have watched the announcements, the rezoning notices, and the survey trucks, and now a data center is going up within sight of your land. The worry that follows is not just about noise or dust or your well. It is the number in the back of your mind, the one that shows up the day you decide to sell. If a buyer can see that building on the horizon, hear the hum, or read about the traffic and the water use, does your land fetch less than it would have, and if it does, can you make anyone pay for that loss?

Here is the honest answer before the analysis, because Texas law on this is not what most people assume. Your land can absolutely lose market value because of what a neighbor builds and how he runs it. But in Texas, lost value is not a lawsuit by itself. It is a measure of damages that rides on top of an underlying wrong, a nuisance, a trespass, a wrongful diversion of water. And even when you have that underlying claim, proving the dollar amount of your lost value is where these cases live or die. Texas courts, including the Supreme Court, have thrown out large diminished-value awards, sometimes after the landowner already won at trial, because the proof was too thin. This guide is intended to help landowners understand how to prove diminished value damages (sometimes referred to as a “diminution” claim).

The practical lesson: lost value is a measure of damages, not a lawsuit by itself

I have represented Texas landowners for more than a quarter century, and this is one of the most common misunderstandings I see. A landowner watches a project go in next door, watches his own value soften, and assumes the value loss is itself the claim. It is not. In Texas, “my land is worth less now” is not a cause of action. It is a way of measuring damages once you have proven that your neighbor did something the law forbids.

That distinction is not a technicality. It decides whether you have a case at all. If the data center is operating lawfully, meeting its permits, and simply exists near you, the fact that a buyer would pay you less does not, by itself, give you a claim. What gives you a claim is an underlying wrong, and the diminished value then becomes the yardstick for what that wrong cost you. Get the order right and you will spend your energy where it belongs: first on proving the wrong, then on proving the loss with evidence that will actually hold up.

You usually need an underlying wrong

So the first question is never “how much did I lose.” It is “what did the data center do that the law treats as a wrong to me.” In this series we have walked through the most common answers. If construction or operations push water onto your land, that can be an unlawful diversion of surface water and a nuisance, which we cover in what happens when data center construction floods your land. If the around-the-clock hum or the all-night lighting substantially interferes with the use and enjoyment of your property, that can be a private nuisance, which we cover in our guide to when a data center’s lights or noise cross the line. If the facility’s wells draw down your groundwater, the analysis is different again, and we cover it in living next to a data center.

Diminished value is where those harms get turned into dollars. That is why this guide is the one that ties the series together. Once you have a viable nuisance, trespass, or water-diversion claim, the loss in your land’s value is often the largest number on the table. But it is also the number that draws the hardest scrutiny on appeal, and the reason is the subject of the rest of this guide.

Permanent or temporary changes how the loss is measured

Assume you have the underlying wrong. Texas then measures your damages according to whether the injury to your land is permanent or temporary, and the two measures are not the same. When the injury is permanent, you recover the lost value of the land, the difference in its fair market value immediately before and immediately after the injury. When the injury is temporary, you recover the cost to repair or restore the property, along with the value of your lost use while it is impaired. Texas courts describe this as an either-or framework: the lost market value if the injury is permanent, or the cost to repair if it is temporary.

Whether an injury counts as permanent is itself a legal question with a specific test. An injury to real property is permanent if it cannot be repaired or restored, or if, even though it could be repaired, it is substantially certain to recur repeatedly and continually so that future harm can be reasonably evaluated. A one-time flood that you fix is usually temporary. A condition that keeps coming back every time it rains, or every time the facility runs, starts to look permanent. That classification decides which damages model you are even allowed to use, so it is not a detail to gloss over. We walk through it in depth in why it matters whether the injury to your land is permanent or temporary.

One more rule keeps these two measures from overlapping. If you recover the cost of repairs and also claim diminished value, the diminished value has to be measured as the difference between your property’s original value and its value after the repairs are made. Measured that way, the two do not duplicate each other. Ignore that discipline and a court will treat part of your award as a double recovery and cut it.

Stigma: when market fear counts, and when a court throws it out

Now to the theory landowners reach for most, and the one that fails most often. Stigma damages are the loss in market value that comes from the market’s fear or negative perception of your property, a loss that can linger even after any physical harm has been cleaned up or repaired. It is an intuitive idea. Buyers hear “there was contamination” or “that place floods” or “it sits next to the data center,” and they discount, or they walk. The problem is not the intuition. The problem is the proof, and Texas law on stigma is far less settled than most people assume.

Start with the biggest surprise. The Texas Supreme Court has never actually decided whether stigma damages are recoverable in Texas at all. In its leading opinion on the subject, a ranch won a jury award of more than $349,000 for the lost market value of its land after a neighboring metal-processing facility contaminated a stock tank, and the court of appeals affirmed. The Supreme Court reversed and rendered a take-nothing judgment. It expressly declined to decide whether Texas even recognizes stigma damages, because it did not need to: even assuming the law allowed them, the landowner’s proof of the amount was legally insufficient. Its now-familiar line captures the trap. Even when it is legally possible to recover stigma damages, it is often legally impossible to prove them.

That case, Houston Unlimited, Inc. Metal Processing v. Mel Acres Ranch, is the one every landowner considering a value claim should understand, because it shows exactly how a sympathetic, winning-at-trial case falls apart. The landowner’s appraiser had taken two other contaminated tracts, calculated the percentage each had supposedly lost, and applied a similar percentage reduction to the ranch. The Supreme Court found an “analytical gap” running through that method. The appraiser never showed the two comparison tracts were actually comparable to the ranch, never proved their value losses came from stigma rather than some other market factor, and never separated out how much of the loss was caused by this defendant as opposed to anything else. As the court put it, the evidentiary value of expert testimony comes from its basis, not from the mere fact that the expert said it. Without that basis, the opinion was no evidence at all, and the award vanished.

The appraisal that survives, and the appraisal that gets excluded

If the losing cases teach what to avoid, the pattern across all of them teaches what to do. Texas courts have been remarkably consistent, and unforgiving, about diminished-value proof.

Consider a case that looks a lot like the flooding scenario in this series. In Golden Corral Corp. v. Noble Austin Apartments, L.L.C., a new commercial neighbor built a restaurant with a parking lot, rain gardens, and a drainage swale, and stormwater flowed onto the apartment property next door. A jury found an unlawful diversion of surface water under the Texas Water Code and awarded $835,000 in diminished value on top of repair costs and lost use. The Austin Court of Appeals wiped out the entire $835,000. The owner had testified to the loss but, in the court’s words, a property owner may not simply echo the phrase “market value” and state a number. He never explained how he arrived at the figure, so there was no evidence to support any amount of diminished value, and the award was reversed and rendered.

The same fate has met other landowners. In Polley v. Simoni, a drainage-and-retaining-wall nuisance case, a jury awarded $162,500 in diminished value, and the Dallas Court of Appeals reversed and rendered it to zero. In Memorial Park Medical Center, Inc. v. Bob Thornhill Trucking, an illegal-dumping case, a jury awarded nothing at all for diminished value, and the Eastland Court of Appeals affirmed the zero, noting that the landowner had presented no market-value or appraisal evidence tying the specific harm to a real loss in value. The through-line is impossible to miss. When the proof is an owner’s bare opinion or an expert’s assumption, the award does not survive.

Now the case that shows the other side. In Cantu v. Hanchey, decided right here in the San Antonio Court of Appeals, a buyer proved $40,000 in diminished market value against a seller, and the court affirmed it. The difference was the quality of the proof. Under what Texas calls the Property Owner Rule, an owner is allowed to testify to the value of his own property, on the presumption that he knows it, but he still has to give the factual basis for his number. This owner did. He tied his figure to the price he had paid, to specific comparable homes in his neighborhood and what they were selling for, and to his own background in real estate. That is the difference between a value opinion that holds and one that gets thrown out.

Put the winning and losing cases side by side and the recipe is clear. Fair market value in Texas is generally proven by comparable sales, by replacement cost less depreciation, or by capitalizing income. A credible diminished-value claim uses one of those recognized methods, rests on real and genuinely comparable data, ties the loss specifically to the data center’s conduct rather than assuming it, and does not duplicate a separate repair-cost claim. That usually means a qualified, independent appraiser, retained early, whose opinion an appellate court cannot later dismiss as a bare conclusion.

You cannot always take the money and the injunction both

There is a strategic wrinkle worth understanding before you decide what to ask for. In a permanent-nuisance case, the lost market value is meant to compensate you for all the future harm, on the theory that the condition is here to stay. But if the court also orders the condition removed or enjoins it, the premise changes. Once a nuisance is abated, Texas treats it as no longer permanent, and you cannot collect permanent-nuisance damages and a removal order for the same condition, because that would be a double recovery.

The Dallas retaining-wall case makes the point. The trial court both awarded permanent-nuisance diminished value and ordered the wall removed with a permanent injunction. The appellate court held that was a double recovery and erased the money, leaving the landowner with the injunction. It added a second reason that matters for any value claim: once the offending condition is gone, a lingering “lost value” based on the chance that the neighbor might rebuild something someday is speculative, and speculative loss is not recoverable. The practical lesson is to think early about what you actually want. If your goal is to make the interference stop, an injunction may be the better remedy, but you generally cannot also pocket the full permanent-value loss on top of it.

Selling land in the shadow of a data center: what you must disclose

Many landowners are not looking to sue anyone. They just want to sell and move on, and the question becomes what they have to tell a buyer about the data center, the noise, the water, or the flooding they have experienced. In Texas, the answer starts with a distinction that surprises people: whether your property is improved or vacant.

Texas Property Code Section 5.008 requires a seller of residential real property with a home on it to give the buyer a written seller’s disclosure notice about the property’s condition. That statutory notice requirement does not apply to the sale of vacant, unimproved land. We explain that in our discussion of why a seller’s disclosure of property condition is not required for vacant land. For a lot of rural tracts near these projects, that means the standard form is not statutorily mandated. It does not mean you are free to conceal a known problem, because misrepresentation and fraud rules still apply, but it changes the starting point.

Where a disclosure notice is required, or where you choose to provide one, take it seriously, because what you write in it carries real exposure. A seller cannot treat the notice as costless boilerplate. As we discuss in why a seller’s statements in a disclosure notice are not protected speech under the TCPA, those statements are not shielded the way some sellers assume, and a buyer who is misled about a known material condition can turn that notice into the centerpiece of a claim. That risk is exactly why disclosure matters when a data center is part of the picture: known, material conditions like recurring flooding, substantial noise, or a well that has been drawn down are the kind of thing a careful seller addresses with counsel rather than papers over.

The other half of selling is marketability, and here the same valuation discipline from the litigation cases helps you as a seller. If the data center has genuinely affected what your land will bring, an honest, well-supported appraisal helps you price and market realistically, time the sale sensibly, and understand your position, rather than discovering the discount only when offers come in low.

What this means for South Central Texas landowners

The data center build-out across Bexar, Medina, Comal, Guadalupe, and Atascosa Counties is landing on rural land that people have held and counted on for generations, and the fear that these projects quietly erode value is not irrational. Texas law gives you a genuine path to recover that lost value, but it is a disciplined path. The loss is a measure of damages, not a claim by itself. It rides on an underlying wrong. It is measured one way if the injury is permanent and another way if it is temporary. And it stands or falls on proof, a real appraisal built on real comparables and tied to the data center’s conduct, not on a number you or an expert simply asserts.

The landowners who come out ahead are the ones who treat this like the evidence problem it is. They document their property before anything changes, they separate the question of the wrong from the question of the loss, they hire an appraiser who can withstand appellate scrutiny, and they think through whether they want compensation, an injunction, or a clean sale before they act. Do that, and a value claim becomes something a court can actually award, rather than a strong feeling that evaporates on appeal.

This guide is part of our data center landowner series. If your value problem starts with water on your land, see what happens when data center construction floods your land. If it starts with noise or lights, see when a data center’s lights or noise cross the line. If it starts with your well, see living next to a data center. And for more on our work for Texas landowners, visit our real estate practice.