More than four in five U.S. metro areas need more new homes, according to a study released last week by the National Association of Realtors. The trade group, which has long been wrestling with a shortage of homes for sale, concluded that there’s a need for more than 1 million new homes.adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-HOME_GARDEN","nativepaywallcategory" : "NATIVE_PREM-HOME_GARDEN"};