A home for sale in Glenview, Ill. Existing-home sales hit the highest level in more than 3 years in February. But not everyone is convinced that the housing sector's momentum has staying power. Nam Y. Huh/AP hide caption

itoggle caption Nam Y. Huh/AP

Brickell CityCentre is a new project that includes retail, offices and two condo towers. In all, some 19 condo towers are going up in downtown Miami, just seven years after the housing market crash. Greg Allen/NPR hide caption

itoggle caption Greg Allen/NPR

A sign hangs outside a house in Miami in 2010. Currently, Florida's foreclosure legal process can take a couple of years, which critics say is hurting the housing market. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

New homebuilding reached a 4 1/2 year high in December, welcome news for an industry that lost 2 million jobs during the downturn. Despite those job losses, the sector is experiencing a labor shortage in some parts of the U.S. Tony Dejak/AP hide caption

itoggle caption Tony Dejak/AP