The crash destroyed the top floor of the maisonette home of Colin and Diane Patterson who were watching television with two of their sons.

BBC: No charges after helicopter crash

Ms. Lambert, the long-time broker for the Ronsons, said a potential buyer could choose to live in the triplex and use the maisonette for staff or guests and the penthouse for entertaining.

WSJ: Pieces of a Mansion Puzzle on Block

One of the other units, a maisonette duplex, is owned by Adolfo Sardina, a fashion designer known as Adolfo who was favored by Nancy Reagan.

WSJ: Pieces of a Mansion Puzzle on Block