Builder Homesite, a consortium of 35 of the industry's largest home builders, now reports that more than 1,500 new-home communities are listed on, a Web site of new-home listings in Spanish. The company underscored the need for the new Web site by pointing out that 65 percent of Hispanic adults own a computer, and Hispanics are expected to account for 31 percent of U.S. household growth by 2010.