Summerlin developer Howard Hughes Corp. sold more land for new housing last year than it did in 2017. It sold 244.8 acres of residential land in Summerlin – Las Vegas’ largest master-planned community – for $144.7 million last year. That’s up from 206.6 acres for $120.7 million in 2017. Summerlin spans 22,500 acres along the valley’s western rim and has roughly 110,000 residents.