Cold Spring Harbor, New York
Delano alone won the commission for the second-largest residence in the United States, [[Oheka Castle|Oheka]], overlooking [[Cold Spring Harbor, New York|Cold Spring Harbor]] on [[Long Island, New York]] for financier [[Otto Kahn]]. Built from 1914 to 1919 in French [[chateau]] style, with gardens by [[Olmsted Brothers]], Oheka ranges over 109,000 square feet (10,000 m²) and was staffed with 125 people.