Demographic changes in the United States also are working against conventional suburban growth, and are likely to further weaken preferences for car-based suburban living. When the Baby Boomers were young, families with children made up more than half of all households; by 2000, they were only a third of households; and by 2025, they will be closer to a quarter. Young people are starting families later than earlier generations did, and having fewer children. The Boomers themselves are becoming empty-nesters, and many have voiced a preference for urban living. By 2025, the U.S. will contain about as many single-person households as families with children.
Because the population is growing, families with children will still grow in absolute number—according to U.S. Census data, there will be about 4 million more households with children in 2025 than there were in 2000. But more than 10 million new single-family homes have already been built since 2000, most of them in the suburbs.