There is not much residential construction going on out there, and what is being built fails to address the new forces shaping the housing market. Example: Among the 125,000 new multifamily rental units completed in 2010, the 54 percent majority had only one bathroom. These units are hitting the market at a time when fewer people are living alone and more young couples who could afford to buy a house are choosing to rent. One bathroom isn't enough.
Source: Census Bureau, Characteristics of New Housing