Apollo Beach, Florida, is a maze of canals lined with hundreds of houses perched right near the water’s edge. The whole community, just south of Tampa, is only about 3 feet above sea level, meaning it’s at risk from storm surge as sea levels rise.

Homebuyers along the U.S. coasts can check each property’s flood risk as easily as they check the size of the bedrooms – most coastal real estate listings now include future flood risk details that take climate change into account. In Apollo Beach, for example, many of the properties are at least 9 out of 10 on the flood risk scale.

That knowledge isn’t stopping homebuyers, though.

Waterfront homes are selling within days of going on the market, and the same story is playing out all along the South Florida coast at a time when scientific reports are warning about the rising risks of coastal flooding as the planet warms.

We are professors of urban geography and American politics who follow the real estate industry. To understand why people are ignoring a risk that could lead to expensive damage and eventually lower their property value, we talked to hundreds of Florida real estate agents about their clients’ motivations and concerns.

Here’s what we learned.

Nothing pushes buyers to consider long-term risk

We surveyed 680 licensed Florida Realtors in late 2020. Their responses suggest that prospective homebuyers, by and large, are not taking elevation or flood vulnerability into account when searching for new homes, and the availability of detailed flood risk maps has had little or no impact on them.

Part of the problem may be that mortgage lenders and appraisers aren’t accounting for properties’ vulnerability to sea level rise, so homebuyers aren’t immediately feeling the risk in their pocketbooks. Wealthier buyers who don’t need a mortgage aren’t required to purchase flood insurance, and Congress has a history of rolling back flood insurance rate increases.

In short, nothing is forcing buyers to consider the long-term risks.

At the same time, studies are clearly showing how risks translate into costs. One recent paper by scientists who create flood risk maps found that Hillsborough County, Florida, home to Apollo Beach and Tampa, is likely to see a 70% increase in annual flood damage by 2050 because of climate change. That’s less than a 30-year mortgage away.

What real estate agents are hearing

We reasoned when we started the survey in 2020 that if some segment of the population was avoiding property at risk of flooding, then demand should decline and prices should fall. Our previous survey in 2018, involving coastal Florida homeowners, had found that Republicans and Democrats alike believed that their future home values would not be affected by rising seas.

To test the theory that the market is largely ignoring flood risk, we asked real estate agents what they saw: To what extent had they observed house prices either falling or not rising as rapidly for properties at risk of flooding? Forty-five percent reported “not at all.” Only 11 of the 680 agents indicated that house prices for properties at risk of flooding were “very frequently” stagnating or falling.

We also asked if they had seen mortgage lenders declining loan applications or increasing charges for loans in flood-prone areas, in the form of points or mortgage insurance, for example. Sixty percent said, “not at all,” and only 7% said “somewhat frequently,” “very frequently” or “all the time.”

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