Patricia "Trish" Vandermeer sells houses in Charleston's flood zones for a living. She knows the market data cold—which neighborhoods flooded in which storms, which homes elevated and when, what they sold for afterward. She has spreadsheets. She has charts. She has a decade of comps showing exactly what happens to property values after flooding events.
Her own house, a 1920s bungalow four blocks from the Ashley River, flooded twice in the last three years. She still hasn't decided whether to elevate it.
We met at her office on a Thursday afternoon, where she'd just finished showing an elevated home to clients who couldn't understand why it was priced below comparable non-elevated properties nearby. If you're wondering whether Trish is a real person or a convenient composite designed to explore the elevation decision paradox... well, let's just say she's as real as the certainty anyone feels when making irreversible climate adaptation choices with incomplete information.
You spend your days helping people navigate flood risk in real estate. How do you explain the elevation decision to clients?
Trish: God, I used to have a script. "Elevation protects your investment, reduces insurance premiums, gives you peace of mind." I could do the whole pitch in my sleep. Thirty percent reduction in premiums for one foot above base flood elevation, sixty percent for three feet, the math works itself out over time, blah blah blah.
Then the research came out. The actual market data from Charleston—my market—showing that elevated homes lose MORE value after floods than non-elevated homes. Nine percentage points more.1 I remember sitting in my office reading that paper thinking, I've been giving people advice that might be financially destroying them.
How did that change your pitch?
Trish: I don't have a pitch anymore. I have... questions? I ask clients what their timeline is. Are you planning to stay fifteen years or sell in five? Because that matters enormously.
The insurance savings are real. I had one client save $1,400 annually by elevating two feet. But if you're selling before you recoup the elevation cost, and the market punishes you for having an elevated home, you're just... you're fucked, basically.
I also ask if they can afford to not care about resale value. Some people can. They're staying in that house until they die, they love the neighborhood, they're not treating it as an investment. For them, elevation might make sense. But most people? Most people need their home equity to fund their next move, their retirement, their kids' education. Telling them to spend $40,000 to $100,000 on elevation that might actively hurt their property value feels insane.
Why do you think the market punishes elevation?
Trish: The research suggests it's stigma. An elevated home is a giant billboard announcing "THIS AREA FLOODS." Even though everyone knows Charleston floods—we had the 2015 flood, Hurricane Matthew, multiple king tide events—there's something about seeing a house on stilts that makes it visceral. Undeniable.
Non-elevated homes in flood zones have this plausible deniability. You can tell yourself, "Well, it hasn't flooded yet," or "That was a once-in-a-century event," or "The previous owners were just unlucky." An elevated home removes all that. It says, "The water is coming, and we know it, and we're scared enough to have done something dramatic about it."
Buyers don't want to confront that. They want to believe they're getting a deal in a nice neighborhood that just happens to be in a flood zone. Elevated homes force them to face reality, and apparently, the market charges you for making people uncomfortable.
You mentioned your own house has flooded twice. Walk me through your decision process.
Trish: laughs My decision process is that I've been "deciding" for two years now. I have a contractor's estimate sitting in my email. I have three different insurance quotes for post-elevation premiums. I've run the numbers so many times I have them memorized.
If I elevate three feet—which is what the contractor recommends given climate projections—it's about $65,000. My insurance premium drops from $2,800 annually to around $1,100. That's $1,700 in savings per year. Simple math says I break even in 38 years, which is longer than I'll probably own this house.
But the insurance calculation assumes premiums stay constant, which they won't. Flood insurance is going up, everyone knows that. So maybe I break even in 25 years? 20? The models keep changing.
What about the property value question?
Trish: That's where I spiral.
According to the Charleston data, if my neighborhood floods again—when my neighborhood floods again—my elevated home might lose 20% of its value while non-elevated homes lose 11%.2 That's a $60,000 difference on a $300,000 house. So I'd spend $65,000 to elevate, save maybe $30,000 in insurance over 15 years, and potentially lose an extra $60,000 in value. The math is horrifying.
But then I think, what if the market changes? What if buyers start valuing elevation as insurance gets more expensive and floods get worse? And then I think, what if I'm just rationalizing because I don't want to sell and move? And then I think, what if I elevate and it floods anyway because I didn't go high enough?
The research from Penn State suggests FEMA's recommendations might be too low given climate uncertainty.3 They're saying homeowners should go higher than the base flood elevation plus one foot. But how much higher? Two feet? Four feet? Every additional foot costs more and makes your house look more fortress-like and presumably more stigmatized.
So you're paralyzed by expertise.
Trish: Completely. And I see this with clients too. The ones who make decisions quickly are either the ones who don't understand the complexity—they just trust FEMA or their contractor—or the ones who've decided they don't care about resale value.
The people who actually dig into the research? They freeze.
I had a client last month, an engineer, super analytical guy. He spent three months modeling different scenarios with different discount rates and climate projections. He finally called me and said, "Trish, I've concluded that the optimal decision depends on variables I cannot possibly know." Then he bought a house in Columbia instead.
That's adaptation through relocation.
Trish: Right, which is its own can of worms. But I get it. Sometimes the decision paralysis is worse than just leaving.
Although then you're dealing with selling a house in a flood zone, which is its own nightmare. I've had listings sit for months because buyers can't get mortgages—lenders are getting skittish about flood zones—or because insurance quotes come back astronomical and the deals fall apart.
Do you think you'll elevate?
Trish: long pause
I don't know. Some days I think yes, absolutely, the floods are getting worse and I can't keep doing this. I can't keep moving furniture to the second floor every time there's a hurricane warning. I can't keep replacing the water heater. The psychological toll of wondering whether this storm will be the one that destroys everything—that has value too, even if it doesn't show up in the cost-benefit analysis.
Other days I think I'm throwing good money after bad. That I should sell now, take the loss, move somewhere that doesn't flood. But I love this house. I love this neighborhood. My kids go to school three blocks away. My mother is ten minutes down the road. Leaving isn't just a financial calculation.
And some days—honestly, some days I think the whole thing is absurd. That we're all just rearranging deck chairs. If sea levels rise the way some projections suggest, elevation doesn't matter. The whole neighborhood goes underwater eventually. So why spend $65,000 on a stopgap measure?
That's pretty dark.
Trish: It's realistic. Look, I'm not a doomer. I think there's a range of futures, and in some of them, elevation makes perfect sense. In some of them, Charleston adapts, we build better infrastructure, the market starts valuing flood protection, and elevated homes become premium properties. That future exists.
But so does the future where I elevate, spend all that money, the market continues to punish elevation, and I end up trapped in a house I can't sell for what I need to move somewhere safer. Both futures are plausible. And I don't know which one I'm living in until it's too late.
What would you need to know to make the decision?
Trish: laughs A crystal ball?
I'd need to know what flood insurance costs in ten years. What the Charleston real estate market does with elevated homes over the next decade. Whether we get hit by a major hurricane that changes everyone's risk perception. Whether climate adaptation becomes a status symbol or remains a stigma. What FEMA's flood maps look like after they're updated—which they're supposed to do but who knows when.
I'd need to know if I'm staying in Charleston long-term or if I'll want to relocate for work or family. I'd need to know if my kids will want to inherit this house or if that's a boomer fantasy. I'd need to know things that are literally unknowable.
So how do you counsel clients facing the same decision?
Trish: I tell them what I just told you. I show them the data—the insurance savings, the elevation costs, the Charleston research on property values, the uncertainty about optimal height. I help them think through their timeline, their financial situation, their emotional attachment to the property. I introduce them to people who've elevated and people who've chosen not to.
And then I tell them that this is one of those decisions where there's no obviously right answer. That they're making a bet on multiple unknowable futures simultaneously. That whatever they decide, they should make peace with the possibility that it might turn out to be wrong.
That's not very reassuring.
Trish: No, it's not. But it's honest. And I think people appreciate that more than false certainty. The worst thing I could do is pretend I know what's going to happen.
I'm a real estate agent in a flood zone in 2025. Nobody knows what's going to happen.
I just wish I could take my own advice.