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.”

Estates with views of the Los Angeles basin are the California counterpart to Manhattan’s penthouses or London’s Mayfair manors, drawing a global cast of financiers, technology tycoons and celebrities who collect trophy homes like works of art. Around the world, five properties sold for $100 million or more last year, and at least 20 others have nine-figure asking prices, Christie’s International Real Estate reported last month.

The priciest home ever sold was a $221 million London penthouse purchased in 2011, according to Christie’s. The most expensive properties on the market include a $425 million estate in France’s Cote d’Azur, a $400 million penthouse in Monaco and a $365 million London manor.

Whether Niami can get more than double the previous record for his mansion remains to be seen.

“I’m skeptical,” said Jonathan Miller, president of appraiser Miller Samuel Inc. and a Bloomberg View contributor. “My first reaction is laughter. But we’re in this perpetual state of surprise as new thresholds are broken.”

U.S. Records

The current highest U.S. asking price is $195 million for Palazzo di Amore, a Beverly Hills, California, estate being offered by billionaire real estate entrepreneur Jeff Greene. The record for a sale was the $147 million that Barry Rosenstein, managing partner at hedge fund Jana Partners, paid last year for an estate in East Hampton, New York.

Niami’s project, on a 4-acre (1.6-hectare) hilltop lot, will have 360-degree views of the Pacific Ocean, Beverly Hills, downtown Los Angeles and the San Fernando Valley. Plans called for removal of almost 40,000 cubic yards (30,600 cubic meters) of earth, the equivalent of an American football field covered by 20 feet (6 meters) of dirt.