BUSINESS
12/29/2010 08:16 am ET Updated May 25, 2011

Multifamily Households Rise As More Americans 'Double Up'

Census Bureau data released in September showed that the number of multifamily households jumped 11.7 percent from 2008 to 2010, reaching 15.5 million, or 13.2 percent of all households. It is the highest proportion since at least 1968, accounting for 54 million people.

Even that figure, however, is undoubtedly an undercount of the phenomenon social service providers call "doubling up," which has ballooned in the recession and anemic recovery. The census' multifamily household figures, for example, do not include such situations as when a single brother and a single sister move in together, or when a childless adult goes to live with his or her parents.

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