Grandma used to move into the spare bedroom and help out with the kids until after World War II when young people moved closer to the city and embraced the new American dream -- a house in the suburbs that had no room for aging parents. Now multigenerational living is making a comeback according to a Pew Research Center report. U.S. Census data recorded 51.4 million (1 in 6) Americans live in #multigenerational households.