The One is the 4th largest private residence in the US. It sold for $126 million. It has a "philanthropy wing" designed to host charity galas with up to 200 guests

The One (Los Angeles)

The One is a private residence in Bel Air, Los Angeles, California, United States. It is a compound of a main residence and three smaller houses in the modernist style and was developed by Nile Niami. The property is 105,000 square feet (9,800 m2) on 3.8 acres (1.5 ha).

Construction began in 2014. Following delays, it was completed in 2021. Niami initially sought to sell the mansion for $500 million, but his company fell into bankruptcy and the building sold at auction for $126 million, a record auction sale price in the United States.

It's owned by Richard Saghian who is a fast fashion douchebag.

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List of largest houses in the United States