What Is the Biggest Mansion in the United States
The biggest mansion in the United States by floor area is the Biltmore Estate in Asheville, North Carolina, with approximately 178,926 square feet of gross living space and 250 rooms across 8,000 acres of grounds, according to the estate's official records and property listings Biltmore Estate Official Site. The property is a historic landmark and a privately held tourist destination, not a single-family residence today, but it remains the largest home ever built in the country by total enclosed area.
By modern residential standards, the largest single-family mansion is often cited as the Versailles-style estate in Florida owned by David A. Siegel and Jackie Siegel, with roughly 90,000 square feet of finished space above ground on a 6-acre site Forbes. Other contenders include the one-acre Bel Air mansion known as The One, which was listed at around 105,000 square feet before its 2022 bankruptcy auction, and several Texas and California compounds that rank highly by lot size and total building volume.
Ownership, Valuation, and Current Status
The Biltmore Estate is held by the Biltmore Company, a private family trust descended from George Washington Vanderbilt II, who opened the house in 1895, and today it operates as a hospitality and tourism business rather than a personal home Biltmore Estate Official Site. The Florida Versailles-style mansion was built by Westgate Resorts founder David Siegel and his wife Jackie, and after years of stalled construction and financial distress it passed through bankruptcy proceedings before being sold to a new owner.
The One in Bel Air was developed by developer Nile Niami and entered bankruptcy in 2022 after failing to sell at its original $500 million asking price, with the property later acquired by a new buyer and subsequently relisted at a reduced price Forbes. Valuation of the biggest mansions in the U.S. depends on square footage, lot size, location, finishes, and income potential, with many of these properties valued in the hundreds of millions or, in the case of The One, originally listed above $500 million.
Rankings, Comparisons, and Key Metrics
When ranked by finished floor area, the Biltmore Estate leads with 178,926 square feet, followed by The One at roughly 105,000 square feet and the Siegel Versailles-style Florida mansion at about 90,000 square feet Forbes. By land area, many of the largest private estates in Texas, California, and Wyoming exceed 1,000 acres, but the Biltmore Estate's 8,000-acre grounds make it one of the largest privately owned residential properties in the country by total parcel size.
Notable Features of the Largest U.S. Mansions
The Biltmore Estate includes a 35-room main house, extensive gardens, a winery, and multiple outbuildings on a property that spans more than 8,000 acres in the Blue Ridge Mountains Biltmore Estate Official Site. The One features a 30-car garage, multiple swimming pools, a bowling alley, a 5,000-bottle wine cellar, and a private movie theater, while the Florida Versailles-style mansion includes a 30-car garage, a ballroom, a bowling alley, and a 24-karat gold-pl