William Rockefeller then purchased it for $150,000. Rockefeller expanded his property to about 1,000 acres (400 ha) and either renovated or rebuilt the castle. The resulting 204-room house measured 174 x 104 feet and was the second-largest private house in the U.S. at the time, only behind the Biltmore mansion in Asheville, North Carolina.[9] After sitting vacant for a time, the mansion was torn down in the 1940s.