Opting for class-B and -C properties might be a smarter bet than investment in new luxury buildings. : Home ownership rates have fallen in recent years due to rising home values and stricter underwriting standards. As a result of this and the increase in the number of people 34 and under—the prime rental age—more U.S. households are renting than at any point in 50 years, according to a study done by the Pew Research Center. The signs all point to an excellent opportunity for investment in multifamily rental properties.