San Diego ranks second after Las Vegas in grown in home size.
San Diego ranks second after Las Vegas in growth in home size.

San Diego has among the most expensive real estate in the country, but it’s also building some of the largest new homes of any major city.

A new study by PropertyShark.com finds that the average home built in San Diego since 2010 has 2,417 square feet of living space, sixth highest among the 32 largest cities and double the average size of new homes in Miami, San Francisco and Boston.

In fact, San Diego homes being built now are 124 percent bigger than they were a century ago, an increase exceeded only by Las Vegas.

“The average size of homes, by which we mean houses, condos and co-ops, has gone up significantly across America, with Las Vegas and San Diego leading the pack in terms of growth,” the real estate information service wrote.

At the start of last century, the average San Diego home was a little over 1,000 square feet.

Still, new homes in San Diego and most other large cities are smaller than the national average of 2,430 square feet, which reflects many smaller cities and rural areas. Only Dallas, Nashville, San Antonio and Orlando are building bigger homes than the national average.

Chris Jennewein is founder and senior editor of Times of San Diego.