The multifamily sector is leading all others as the commercial real estate market recovers, according to PricewaterhouseCoopers. In its first-quarter real estate investor survey, PwC attributed the multifamily revival to banks’ tougher lending practices, which have limited home buying. The survey also found that the office sector will recover in most markets by the end of this year, though Chicago, Las Vegas, Los Angeles and Tampa, Fla., will likely remain down through 2012.