One of the biggest homes in U.S. history is rising on a Los Angeles hilltop, and the developer hopes to sell it for a record $500 million.  Nile Niami, a film producer and speculative residential developer, is pouring concrete in L.A.’s Bel Air neighborhood for a compound with a 74,000-square-foot (6,900-square-meter) main residence and three smaller homes, according to city records. The project, which will take at least 20 more months to complete, will exceed 100,000 square feet, including a 5,000-square-foot master bedroom, a 30-car garage and a “Monaco-style casino,” Niami said.

“The house will have almost every amenity available in the world,” he wrote in an e-mail. “The asking price will be $500 million.”