Homebuilders are changing their floorplans to accommodate more people living under one roof. As adult children and aging parents move in, home owners are finding the need for more defined, separate housing corridors within their homes.

For example, homebuilder Lennar is expanding the offerings of what it calls the “Next Gen” house. Introduced in western states like California, Arizona, and Texas, Lennar is now taking its “Next Gen” floorplan to North Carolina. The single-family home features a second door, separate from the main entrance, that leads to a 500-square-foot suite for a private residence. There’s also a door inside the main house to access the suite.

“We market it as two homes, one payment,” says Trish Hanchette, Lennar’s Raleigh division president.

Homebuilders also are finding flexible first-floor space is in high demand. The spaces can be used as a mother-in-law suite or changed into a nursery, extra bedroom, or home office.

Some in the housing industry are also calling some flex rooms “bounce back” rooms — so named for adult children who have moved back in with their parents because they're struggling to make it on their own.

“The number of 22- to 30-year-olds that are still living at home is at a record high right now,” says Hampton Pitts, an executive vice president with Ashton Woods Home. “So you have that college graduate that’s back at home looking for a job and maybe got their first job but not ready to be in an ownership or rent situation.”

Source: “Builders Target Families with Multiple Generations Under One Roof,” RISMedia (Jan. 8, 2013)