25 Biggest Mansions In The World

Posted by , Updated on February 9, 2024

Although not all of us want to live in huge houses, we all have at least an inkling of curiosity with regards to the biggest houses in the world. And while some of us may see big mansions as the rich taking advantage of the poor, others may see a testament to hard work. Either way, these are the 25 Biggest Mansions In The World!


Indian Neck Hall (Oakdale, New York)

Indian Neck Hall (Oakdale, New York)Source: nytimes.com

When this Georgian style home was built in 1897, it was said to be the biggest mansion on Long Island at 75,000 square feet.


Woodlea (Scarborough-on-Hudson, New York)

Woodlea (Scarborough-on-Hudson, New York)Source: nytimes.com

Built in the nearly 1900’s, Woodlea is part of the Sleepy Hollow Country Club and serves as its 70,000 square foot clubhouse.


Pensmore (Highlandville, Missouri)

Pensmore (Highlandville, Missouri)Source: dailymail.co.uk

The Pensmore Mansion is an under-construction residence in the Ozark Mountains of Missouri. Due to its remote location and bunker like walls, it has been the source of numerous conspiracy theories. At 72,000 square feet, it has even been called the Pensmore Castle. Concrete magnate Steven Huff, however, denies that it will be anything other than a home for his family.


Amalienborg (Copenhagen, Denmark)

Amalienborg (Copenhagen, Denmark)

Located in Copenhagen, Amalienborg is the 285,244 square foot home of the Danish Royal family.


Wentworth Woodhouse (Wentworth, UK)

Wentworth Woodhouse (Wentworth, UK)Source: bbc.com

Aside from royal residences, this is the largest private mansion in the United Kingdom. With an east front of 185 meters (606 feet), it has the longest facade of any country mansion in Europe.


Searles Castle (Great Barrington, Massachusetts)

Searles Castle (Great Barrington, Massachusetts)Source: seattletimes.com

Built in the 1880’s, this French style Chateau has 36 fireplaces and includes a dungeon basement!


Palazzo Pitti (Florence, Italy)

Palazzo Pitti (Florence, Italy)Source: corriere.it

Dating back to 1458, today this large Italian mansion is one of the biggest museum complexes in Italy with 344,445 square feet of galleries and museums.


Florham (Madison, New Jersey)

Florham (Madison, New Jersey)Source: view2.fdu.edu

This Vanderbilt estate in Madison, New Jersey was built by Florence Adele Vanderbilt, and at 80,000 square feet, it’s the 8th largest mansion in the United States. Today, it is owned by Fairleigh Dickinson University.


Antilla (Mumbai, India)

Antilla (Mumbai, India)Source: bbc.com

This private skyscraper mansion in South Mumbai is owned by Mukesh Ambani and has been valued as the world’s most expensive private residence at over $1 billion. It has 27 floors and employs more than 600 people!


Dumbarton Oaks (Washington DC)

Dumbarton Oaks (Washington DC)Source: washingtonpost.com

This historic estate in the Georgetown neighborhood of Washington DC is now a part of Harvard University. It’s so big that just its library is 44,500 square feet!


Ralston Hall (Belmont, California)

Ralston Hall (Belmont, California)Source: ndnu.edu

Originally built by William Chapman Ralston, a San Francisco businessman, Ralston Hall is now part of Notre Dame de Namur University. It is a 55,360 square foot mansion with 80 rooms on 4 floors!


Meadow Brook Hall (Rochester Hills, Michigan)

Meadow Brook Hall (Rochester Hills, Michigan)Source: meadowbrookhall.org

Meadow Brook Hall is a Tudor revival style mansion in Rochester Hills, Michigan. It was built in the 1920’s by Matilda Dodge Wilson (the widow of car pioneer John Francis Dodge). In 1957, the mansion was donated to the state of Michigan to found Michigan State University – Oakland. Often called one of America’s “castles,” it has 110 rooms on 88,000 square feet.


Andrew Carnegie Mansion (Manhattan, New York City)

Andrew Carnegie Mansion (Manhattan, New York City)Source: nytimes.com

It may be hard to believe, but yes, there is a historic mansion in downtown Manhattan – right across from Central Park. (The surrounding neighborhood actually takes its name from it – Carnegie Hill.) Of course, given all the skyscrapers, Carnegie’s Mansion looks comparatively small in spite of being over 56,000 square feet.


Grey Towers Castle (Glenside, Pennsylvania)

Grey Towers Castle (Glenside, Pennsylvania)Source: arcadia.edu

Built in the 1890’s as the estate of William Welsh Harrison, today this 66,341 square foot mansion is a part of Arcadia University.


Castle Hill (Ipswich, Massachusetts)

Castle Hill (Ipswich, Massachusetts)Source: boston.com

With 56,881 square feet overlooking Ipswich Bay just north of Boston, Castle Hill’s history goes all the way back to the Massachusetts Bay Colony and its first English settlers.


Whitehall (Palm Beach, Florida)

Whitehall (Palm Beach, Florida)Source: palmbeachpost.com

Listed on the National Register of Historic Places, this 60,000 square foot mansion was built by Henry Flagler; today it houses a museum dedicated to the oil tycoon.


Çankaya Mansion (Ankara, Turkey)

Çankaya Mansion (Ankara, Turkey)Source: bbc.com

Until 2014, this was the official residence of the President of Turkey. It has 1,150 rooms, a botanical garden, and several nuclear bunkers.


Lynnewood Hall (Elkins Park, Pennsylvania)

Lynnewood Hall (Elkins Park, Pennsylvania)Source: time.com

At 70,000 square feet, Lynnewood Hall is the largest surviving Gilded Age mansion in the Philadelphia area.


Arden (Harriman, New York)

Arden (Harriman, New York)Source: forbes.com

Covering nearly 100,000 square feet, this was the estate owned by railroad magnates Edward Henry Harriman and Mary Averell Harriman. The couple was so wealthy that the nearby village of Harriman is named after them.


Rashtrapati Bhavan (New Delhi, India)

Rashtrapati Bhavan (New Delhi, India)Source: telegraph.co.uk

Formerly known as the Viceroy’s House, this is the official home of the President of India. It consists of 340 rooms on 4 floors and was built using over 700 million bricks.


The Breakers (Newport, Rhode Island)

The Breakers (Newport, Rhode Island)Source: newportmansions.org

This 62,482 square foot ocean side mansion became a National Historic Landmark in 1994. It’s owned by the Preservation Society of Newport County and sees visitors all year round.


Schönbrunn (Vienna, Austrla)

Schönbrunn (Vienna, Austrla)Source: heute.at

A former imperial summer residence, Schönbrunn has become a major tourist attraction since the 1950’s. It covers 334,284 square feet and receives more than 2.6 million visitors every year.


Winterthur Museum (Winterthur, Delaware)

Winterthur Museum (Winterthur, Delaware)Source: winterthur.org

This 96,582 square foot mansion-museum was built by H. F. du Pont in the early 1900’s and is modeled after 18th century European country houses. In 1951, he made most of the estate into a public art museum.


Shadow Lawn (West Long Branch, New Jersey)

Shadow Lawn (West Long Branch, New Jersey)Source: nytimes.com

Shadow Lawn was originally built by Hubert T. Parsons, the president of the F.W. Woolworth Company. When he lost his wealth in the Great Depression of the 1930’s, the 90,000 square foot house sold for $100 in 1939. Today it is a part of Monmouth College.


Grand Serail (Beirut, Lebanon)

Grand Serail (Beirut, Lebanon)Source: lebanon.com

Perched on top of a hill in downtown Beirut, this 427,327 square foot historic mansion is the official headquarters of the Prime Minister of Lebanon.

Photos: Feature Image: shutterstock, 25. Thomas Giamboi ’74, The Mansion, CC BY-SA 3.0, 24. wikimedia commons (public domain), 23. google maps, 22. Wolfgang Sauber, Amalienborg – Schlossplatz 1, CC BY-SA 3.0, 21. Jeff Pearson, Wentworth Woodhouse 01, CC BY-SA 2.0, 20. John Phelan, Searles Castle, Great Barrington MA, CC BY-SA 3.0, 19. Stefan Bauer, http://www.ferras.at, Palazzo Pitti Gartenfassade Florenz, CC BY-SA 2.5, 18. Profdarden, Florham Park from the mini-drone, CC BY-SA 4.0, 17. Jhariani, Ambani house mumbai, CC BY-SA 3.0, 16. wikimedia commons (public domain), 15. Created by Kglavin, Ralston hall, CC BY-SA 3.0, 14. Wm. Chris Rowland, II, Meadowbrook Hall, CC BY-SA 3.0, 13. wikimedia commons (public domain), 12. Shuvaev, Grey Towers Castle, Southern Side 01, CC BY-SA 3.0, 11. Djmcrenn, Crane estate (5), CC BY 3.0, 10. Leonard J. DeFrancisci, Whitehall (Palm Beach, Florida) 001, CC BY-SA 3.0, 9-8. wikimedia commons (public domain), 7. Peter Bond from Philadelphia, PA, USA. Color-corrected, sky noise cleaned up and cropped by Daniel Case 2008-06-21, Arden House 1, CC BY-SA 2.0, 6. Dhanushthonaparthi, Rashtrapati Bhavan president residence, CC BY-SA 4.0, 5. UpstateNYer, The Breakers Newport, CC BY-SA 3.0, 4. Thomas Wolf, www.foto-tw.de, Schloss Schönbrunn Wien 2014 (Zuschnitt 2), CC BY-SA 3.0 DE, 3. Photo by and (c)2007 Derek Ramsey (Ram-Man), Winterthur Museum Building Wide Angle 2969px, CC BY-SA 2.5, 2. Zeete, Woodrow Wilson Hall, West Long Branch, NJ – south view, CC BY-SA 4.0, 1. BlingBling10, GrandSerail, CC BY-SA 3.0