 The mansion was converted into the administration building for the district, and Great Neck South High School and Junior High School were built on the site.By 1974, Bessemer Trust Company developed an expertise in wealth management that allowed it to take on other clients through the creation of a national bank headquartered in New York City.Phipps' grandchildren, from his son John S. Phipps, donated to the public the Westbury House estate that is now known as Old Westbury Gardens.