Make room Mom: More kids, parents under one roof

More generations are sharing one roof, and households will likely only get bigger in the years ahead, surveys show.

Nearly a third of homeowners say they expect their adult children and aging parents to eventually move in with them, according to a new survey of more than 1,000 home owners conducted by homebuilder PulteGroup.

One in seven of homeowners surveyed say they already have an adult child or elderly parent living with them.

Indeed, multigenerational households are at their highest level since the 1950s, according to Pew Research Center.

The higher number of people living under one roof is prompting changes in home designs, builders say. For example, PulteGroup is experimenting with additional master suites in a home — one upstairs and one downstairs — to better accommodate elderly parents who are moving in.