Home > Press > See inside this 105,000-square-foot Los Angeles megamansion that just listed for $295 million and is headed to an online auction soon See inside this 105,000-square-foot Los Angeles megamansion that just listed for $295 million and is headed to an online auction soon The One Bel Air is a 105,000-square-foot megamansion said to be the biggest modern home in the US.