Why Your Summer House Could Be a Shaky Investment

For decades, it's been part of the American dream: owning a vacation home, a lakeside or mountain getaway somewhere for the family to escape to on weekends or for a week or two in summer. And with the country enjoying strong economic growth, a healthy stock market, and relatively low mortgage rates, you might think beach houses and country cabins would be especially hot commodities today.

But all is not well in Holiday Village. "Vacation-home sales have been relatively weak for the last four or five years," says Aaron Terrazas, senior economist for housing analysis firm Zillow. Demand is being stalled by a traffic jam of different trends--ranging from climate change to demographics to, of all things, the Trump tax reforms. Year-over-year price changes in many second-home markets have dipped into negative territory, and some experts think that trend could go national over the next couple of years--making many buyers think twice about a real estate investment that people used to count on for both fun and profit.

From one angle, the vista looks rosy: The median price of U.S. vacation homes rose 4.2% in 2016, to $200,000, their highest level since 2006, according to the National Association of Realtors. But there were only 721,000 vacation-home sales transactions that year, a 36% drop from 2014.

More recent sales data is harder to track down--the realtor association recently announced that it would no longer publish a vacation-home survey, citing the costs and challenges of figuring out which homes are primary residences and which are part-time. But other analysts say the slowdown has continued--and that it's likely to get worse before it gets better. And the numbers back them up. To help Fortune analyze vacation-home price trends, real estate site Trulia looked at zip codes in which at least 25% of residential properties were identifiable as vacation homes. While prices in those zones rose a respectable 14.8% in the three years through March, they badly lagged prices in non-vacation areas, which increased 25.2%--a difference of more than 10 percentage points.

Experts attribute the relatively sluggish market to a perfect storm of factors--including, well, storms. Eastern beach homes have lost a lot of cachet, Terrazas explains: "Climate change has come to the forefront, and people are evaluating those coastal risks more than they have in the past." Indeed, Trulia's data shows price softness and even declines in seaside areas ranging from Ocean City, N.J., to Virginia Beach, to Florida communities like Miami and Key West. But the damage isn't confined to the beach: Year-round mountain vacation communities like Coeur d'Alene, Idaho, and Bennington, Vt., are being affected too. So what other worries are on buyers' minds?