The One, Los Angeles

The One in Bel Air is the largest private home ever built in America, at 105,000 square feet completed in 2022 after a decade of construction. This mega-mansion features 21 bedrooms, 42 bathrooms, a 30-car garage, a 400-foot outdoor track, a nightclub, a 4D cinema, five pools, a beauty salon, and a helicopter pad. Its 2023 sale price of $126 million makes it 25% cheaper per square foot than the average Bel Air luxury property, though its sheer scale remains unmatched. The home's amenities surpass those of #6 Casa Mila's modest 32 apartments, offering a level of luxury that redefines modern residential excess. Annual property taxes exceed $1.5 million.