To achieve that coveted “most expensive” accolade, the home has to sell for more than the $238 million that hedge fund manager Ken Griffin dropped on the top four floors of an unfinished condo tower at 220 Central Park South in New York City back in 2019. Ten years in the making, “the One” was the dream of Hollywood film producer turned mega-mansion developer, Nile Niami. In the early 2000s, Niami commissioned architect-to-the-stars Paul McLean to design the “most expensive home in the urban world”.