10 Biggest Houses That You Will Find In The US

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Ever dreamed of living like royalty – without leaving the country? Scattered across the U.S. are palatial homes so extravagant, they make five-star resorts look modest.

From century-old estates dripping in history to sleek mega-mansions packed with nightclubs, car galleries, and indoor theaters, these jaw-dropping residences push the boundaries of luxury, size, and imagination. This is American excess at its most awe-inspiring.

1. Biltmore Estate: America’s Castle

Biltmore Estate: America's Castle
© Biltmore Estate

Nestled in the Blue Ridge Mountains of North Carolina, this magnificent French Renaissance château spans a whopping 175,000 square feet. Biltmore Estate was built by George Vanderbilt in 1895 and features 250 rooms, including 35 bedrooms and 43 bathrooms.

Still owned by Vanderbilt descendants, this architectural marvel sits on 8,000 acres of meticulously landscaped gardens and forests. Visitors can tour this grandest private home in America and experience its timeless opulence firsthand.

2. Oheka Castle: Long Island’s Grand Mansion

Oheka Castle: Long Island's Grand Mansion
© Historic Hotels of America

Rising majestically on Long Island’s Gold Coast, this French-style château contains 127 rooms across 109,000 square feet. Financier Otto Hermann Kahn commissioned this masterpiece in 1919 as his country retreat, spending $11 million (equivalent to $158 million today).

Oheka Castle sits on 443 acres and once employed 126 servants. Now functioning as a luxury hotel and event venue, this magnificent estate has appeared in numerous films and TV shows, including Citizen Kane and Succession.

3. The One: Bel Air’s Modern Marvel

The One: Bel Air's Modern Marvel
© Robb Report

Perched atop a hill with 360-degree views of the Pacific Ocean and Los Angeles skyline, this ultra-modern behemoth sprawls across 105,000 square feet. Seven years in the making, the property boasts 21 bedrooms, 42 bathrooms, a 30-car garage, and five swimming pools.

Developer Nile Niami envisioned this as America’s most expensive home. Despite bankruptcy complications, The One remains a testament to contemporary luxury with its nightclub, beauty salon, bowling alley, and 10,000-square-foot sky deck.

4. Fair Field: Hamptons Mega-Compound

Fair Field: Hamptons Mega-Compound
© Curbed Hamptons

Sprawling across the exclusive Southampton coastline, this colossal compound encompasses approximately 110,000 square feet of living space. Built by billionaire investor Ira Rennert in the late 1990s, it sparked controversy among locals due to its unprecedented size.

The main house features 29 bedrooms and 39 bathrooms. With its own power plant, two bowling alleys, a 164-seat theater, and a 100-car garage, Fair Field redefines residential excess while offering breathtaking Atlantic Ocean views.

5. Pensmore: Missouri’s Concrete Giant

Pensmore: Missouri's Concrete Giant
© FourStatesHomepage.com

Rising from the Ozark countryside stands a fortress-like mansion built to withstand tornadoes, earthquakes, and even bomb blasts. Constructed using specialized concrete technology, this 72,000-square-foot behemoth combines old-world château aesthetics with cutting-edge sustainability features.

Steven Huff, a former CIA officer and astrophysicist, designed Pensmore to last for centuries. Its 13 bedrooms, geothermal heating system, and disaster-proof construction make this unique residence both imposing and environmentally forward-thinking.

6. Gemini Estate: Florida’s Oceanfront Palace

Gemini Estate: Florida's Oceanfront Palace
© Town & Country Magazine

Straddling the entire width of Palm Beach island, this extraordinary 62,200-square-foot compound offers both Atlantic Ocean and Intracoastal Waterway frontage. Originally built by Gloria Guinness, it was later purchased by billionaire John Kluge before passing to its current owner.

The botanical wonderland surrounding Gemini features 1,500 tropical species. With its 33 bedrooms, PGA-standard golf practice area, basketball court, and butterfly garden, this paradise represents the pinnacle of Florida luxury living.

7. Xanadu 2.0: Gates’ High-Tech Haven

Xanadu 2.0: Gates' High-Tech Haven
© The Seattle Times

Nestled among Douglas firs on Lake Washington’s shoreline sits a technological marvel spanning 66,000 square feet. Built over seven years at a cost of $63 million, this Pacific Northwest compound blends cutting-edge technology with environmental consciousness.

Bill Gates’ primary residence features underwater music systems, digital art displays that change with the push of a button, and temperature-controlled floors. The property includes a 2,500-square-foot gym, 60-foot swimming pool, and a trampoline room with 20-foot ceilings.

8. Hearst Castle: California’s Historic Hilltop

Hearst Castle: California's Historic Hilltop
© San Simeon

Commanding stunning views of the Pacific Ocean from atop a hill in San Simeon, this Mediterranean Revival masterpiece spans 68,500 square feet. Newspaper magnate William Randolph Hearst collaborated with architect Julia Morgan to create this dream estate between 1919 and 1947.

The main house, Casa Grande, contains 115 rooms. With its Neptune Pool, indoor Roman Pool, movie theater, and airfield, Hearst Castle once hosted Hollywood’s elite and world leaders. Now a California State Park, it welcomes visitors year-round.

9. Spelling Manor: Hollywood’s Mega-Mansion

Spelling Manor: Hollywood's Mega-Mansion
© lovePROPERTY

Towering over Los Angeles’ Holmby Hills neighborhood, this French château-inspired colossus spans a staggering 56,500 square feet. Television producer Aaron Spelling commissioned this dream home in 1988, creating what was then the largest private residence in Los Angeles County.

With 123 rooms including a bowling alley, ice rink, and multiple gift-wrapping rooms, Spelling Manor epitomizes Hollywood excess. The property boasts 14 bedrooms, 27 bathrooms, and a 100-car garage, all set behind imposing gates on nearly five acres.

10. Meadow Lane Compound: Southampton’s Beachfront Behemoth

Meadow Lane Compound: Southampton's Beachfront Behemoth
© AOL.com

Stretching across 42 acres of prime Southampton beachfront, this remarkable compound features multiple structures totaling over 60,000 square feet. Hedge fund billionaire John Paulson acquired neighboring properties to create this extraordinary oceanfront estate.

The compound includes a main mansion, guesthouses, and extensive recreation facilities. With its quarter-mile of private Atlantic Ocean frontage, two golf holes, tennis courts, and multiple pools, this Hamptons masterpiece represents the ultimate in coastal luxury living.

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