It's become harder to realize the dream of home ownership without a college degree. Sixty-two percent of buyers have at least a four-year college degree. Census figures show that just 33 percent of the U.S. adults graduated from college. The gap between the education levels of homebuyers and the broader U.S. population indicates that workers with only a high school degree are becoming less likely to own a home.

This is a major shift for the middle class. Just 12 percent of homeowners in 1986 were college graduates, according to government figures. The trend is driven in part by falling incomes for people with only a high school degree.