(CNN) - America's biggest homes are getting even bigger.
The average size of homes built last year hit an all-time high of 2,600 square feet.
During the housing bubble years, homes averaged 2,400 square feet, according to the Census Bureau.
Experts say one reason is the rich are getting richer and are buying bigger homes.
Extremely large houses, 4,000 square feet and up, make up a much larger slice of the new homes being built.
Meanwhile, first time home buyers, the biggest market for smaller homes, either have trouble getting mortgages or are heavily in debt.
Copyright 2014 CNN. All rights reserved.