Based on my 10 minutes of looking around, it seems the largest population of people buying new homes are retired people paying in cash, whose timelines aren't so long-viewed. There's also the belief that seawalls and other mitigating factors aren't so expensive, and will be subsidized by the government.

https://redgreenandblue.org/2022/03/26/sea-level-rise-coasta... (concerning Florida):

> The largest pool of buyers driving market are retired or soon to be retired people and they have the belief that they will be long gone before there is any impact from climate change. They mainly are buying on emotion and not factoring in the long-term cost of ownership. They are also buying with cash and no mortgage.”

https://www.wbur.org/news/2019/05/14/climate-change-real-est... gives examples:

> A nationwide study by the First Street Foundation suggests climate change concerns have caused nearly $16 billion in lost appreciation of property values along the Eastern Seaboard and Gulf Coast since 2005

> In another recent study , researchers at the University of Colorado Boulder's School of Business found coastal properties most exposed to sea level rise sold, on average, for 7 percent less than equivalent properties the same distance from shore but not as threatened by the sea.

> And in Florida's Miami-Dade County, higher-elevation properties are appreciating faster than lower ones as companies and deep-pocketed buyers increasingly consider climate change risks, a study in the publication Environmental Research Letters found last year.

then notes:

> But Williams and other researchers note the First Street Foundation study uses sea-level rise predictions from the Army Corps of Engineers that are more dire than figures from the National Oceanic and Atmospheric Administration, which usually provides the go-to numbers for such studies.

> The other two studies largely rely on data from Florida, which is so low and highly developed that in many ways it is an outlier, unaffiliated researchers point out. They also focus only on single-family homes, leaving out huge numbers of condos, high-rises and other multi-family properties.

Finally, https://yaleclimateconnections.org/2018/09/sea-level-rise-hi...

> So what should we make of the fact that beachfront home buyers seem unconcerned? Are they just burying their heads in the sand?

> Spiegel doesn’t think so. By the time most properties will be at any serious risk of ocean waves lapping at their front doors, which could in some places be more than a century from now, the homes will probably have deteriorated anyway—leaving plenty of time for them to be torn down and rebuilt on stilts, or to create a sea wall, if necessary.

> Homeowners may not even have to pay for certain large-scale mitigation efforts themselves: major cities including Boston and New York have already begun planning infrastructure projects that would provide storm barriers and prevent flooding.

> “Between the amount of time that’s involved for the vast majority of homes that we’re talking about, and the amount of time you have for mitigation efforts—among the many things you should worry about in your life, this isn’t it,” he says Spiegel