Prices for luxury properties in ski towns like Aspen, Colorado, and Park City, Utah, are "through the roof," according to Mauricio Umansky, founder and CEO of real estate firm The Agency.

Demand in Aspen and Park City has surged and supply is low as the coronavirus pandemic has hastened the trend of the wealthy vacationing year-round in those winter enclaves, Umansky told FOX Business.

"A lot of traveling to Europe this year is probably nonexistent … And so I think a lot of Americans are looking where to enjoy the summer," he said.

Growth in the greater Park City market during the first quarter of 2020 outpaced the same period a year earlier, despite the pandemic, according to the Park City Board of Realtors. The number of homes sold increased by 11 percent, and the median sale price was up 5 percent year-over-year.

The median sale price was nearly $2 million in Park City during the first quarter of the year, according to the group.

Meanwhile, Aspen has seen a year-to-date 6.7 percent rise in median sales prices to $6.4 million for single-family homes compared to 2019, according to the Aspen Board of Realtors. The number of days homes have sat on the market is down by more than 30 percent, and the number of new listings has dropped.