We love our bedrooms and bathrooms.

In 2015, the share of new single-family homes sold that had at least four bedrooms and at least three bathrooms hit a more than three-decade high. And one expert suggests this bedroom and bathroom trend is being driven by a fundamental change in American living arrangements.

Data from the U.S. Census Bureau shows 53 percent of new single-family homes sold in 2015 had at least four bedrooms and 41 percent had at least three bathrooms. Back in 1978, just 27 percent of new single-family homes sold had at least four bedrooms and just 8 percent had at least three bathrooms.

Of course, in order to squeeze in more bedrooms and bathrooms, the average American home has grown bigger. In 1975, the average new single-family home took up 1,975 square feet, the Census Bureau says. Today, that number exceeds 2,600 square feet. That’s a four-decade jump of more than 30 percent.

luxury bathroom

Multigenerational Ownership

Daren Blomquist, senior vice president of RealtyTrac, which specializes in housing data and analysis, says the trend toward larger homes — featuring more bedroom and more bathrooms — reflects the “increasing acceptance” of at least two generations of a family living under one roof.

“Part of this acceptance is brought about by cultural changes influenced by a higher percentage of foreign buyers who are open to multigenerational homeownership,” Blomquist says, “as well as millennials who put more value on their social network than their personal space.”

Blomquist says multigenerational homeownership is being spurred by the overall lack of affordability and inventory in the housing market. According to RealtyTrac data, up to 14 percent of home sales last year in the U.S. involved multigenerational buyers.

In 2012, a record 57 million Americans (18 percent of the U.S. population) lived in multigenerational family households, according to a Pew Research Center analysis of Census Bureau data. That compares with 28 million in 1980 (12 percent).

In this infographic, we examine the growing number of bedrooms and bathrooms in American homes — a development being fueled in large part by the rise of multigenerational households.

America's Love Affair With Bedrooms and Bathrooms Infographic

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