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Home Blog Home Buying Tips & Guide Largest House in the World

Top 10 Largest Houses in the World: Location, Owner, No. of Rooms and Floors in 2025

Published : June 30, 2025, 11:51 AM

Updated : June 30, 2025, 11:51 AM

Author : author_image Jessica

526 views

When we consider the largest house in the world, we enter a realm of architectural marvels and unimaginable luxury. The term largest in this context almost always refers to the total interior floor space, measured in square feet or square meters. This distinction is important as some properties may occupy vast lands but have smaller living quarters. The current titleholder for the biggest residential palace is Istana Nurul Iman, the official residence of the Sultan of Brunei. The fascination with the world's biggest houses stems from their sheer scale, opulent amenities, and the powerful individuals who own them.

List of 10 Largest Houses in the World - Quick Info

Here is a brief look at the most colossal residences across the globe. These structures are not just homes but monuments of wealth, power, and architectural ambition that redefine residential living.

House NameLocationSize (sq. ft.)Acres
Istana Nurul ImanBandar Seri Begawan, Brunei2,152,78249 Acres
Buckingham PalaceLondon, United Kingdom828,82140 Acres
AntiliaMumbai, India400,0001.1 Acres
Biltmore EstateAsheville, North Carolina, USA178,9268,000 Acres
Safra MansionSão Paulo, Brazil117,0002.8 Acres
The OneBel Air, California, USA105,0003.8 Acres
WitanhurstLondon, United Kingdom90,0005 Acres
Villa LeopoldaVillefranche-sur-Mer, France80,00018 Acres
Fairfield PondSagaponack, New York, USA62,00063 Acres
Gemini MansionManalapan, Florida, USA62,20015.65 Acres

10 Largest Houses in the World - Detailed Information

Let's go deeper into the specifics of these architectural giants, exploring what makes each one a unique and the largest mansion in the world in its own right.

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1. Istana Nurul Iman, Bandar Seri Begawan, Brunei

istana largest home in the world
Istana Nurul Iman – The largest residential palace in the world and home to the Sultan of Brunei.

This palace, whose name translates to 'The Light of Faith Palace,' is undisputedly the largest home in the world. It serves as the official residence of the Sultan of Brunei, Hassanal Bolkiah, and the seat of the Brunei government. Its immense size symbolises the nation's wealth and the monarch's stature.

Quick Facts about Istana Nurul Iman

CategoryDetails
House NameIstana Nurul Iman
OwnerHassanal Bolkiah (Sultan of Brunei)
LocationBandar Seri Begawan, Brunei
Size (sq ft) & Acre2,152,782 sq ft on 49 acres
Year Built1984
Rooms1,788
FloorsVaries across wings
Public AccessLimited access during the annual Hari Raya Aidilfitri festival
Estimate ValuationOver ₹12,450 Crores (Approx. $1.5 Billion)
Unknown FactThe palace's dome is gilded with 22-carat gold.

2. Buckingham Palace, London, United Kingdom

buckingham the biggest mansion on earth
Buckingham Palace – A royal landmark and one of the largest residences in the world, located in London.

Buckingham Palace is one of the grandest buildings on the planet. It serves as the London residence and administrative headquarters of the monarch of the United Kingdom. Though not a purely private residence, its scale is so vast that it consistently ranks among the world's biggest houses.

Quick Facts about Buckingham Palace

CategoryDetails
House NameBuckingham Palace
OwnerThe Crown Estate
LocationLondon, United Kingdom
Size (sq ft) & Acre8,28,821 sq ft on 40 acres
Year Built1703 (as Buckingham House)
Rooms775
Floors5
Public AccessYes, the State Rooms are open to the public during the summer.
Estimate ValuationApproximately ₹40,670 Crores (Approx. $4.9 Billion)
Unknown FactThe palace has its own post office, cinema, and police station.

3. Antilia, Mumbai, India

antilia biggest and most expensive house in world
Antilia – Mukesh Ambani’s home in Mumbai, among the world’s largest and most expensive private residences.

This modern architectural marvel is a private skyscraper home in the heart of Mumbai. Owned by Indian billionaire Mukesh Ambani, Antilia is the world's most expensive private residence to be built from the ground up, making it a candidate for the world's biggest and most expensive house.

Quick Facts about Antilia

CategoryDetails
House NameAntilia
OwnerMukesh Ambani
LocationMumbai, India
Size (sq ft) & Acre400,000 sq ft on 1.1 acres
Year Built2010
RoomsNot publicly specified, but includes numerous lounges and suites
Floors27
Public AccessNo
Estimate ValuationBetween ₹8,300 Crores and ₹16,600 Crores (Approx. $1-2 Billion)
Unknown FactThe structure is engineered to withstand a magnitude 8 earthquake.

4. Biltmore Estate, Asheville, North Carolina, USA

biltmore the world's biggest house
Biltmore Estate – The largest privately owned home in the U.S., located in North Carolina.

The Biltmore Estate holds the title of the largest private residence in the world within the United States. Built for George Washington Vanderbilt II, this Châteauesque-style mansion is a historic landmark that showcases the opulence of the Gilded Age and stands as the largest house ever built in America.

Quick Facts about Biltmore Estate

CategoryDetails
House NameBiltmore Estate
OwnerThe Biltmore Company (descendants of the Vanderbilt family)
LocationAsheville, North Carolina, USA
Size (sq ft) & Acre178,926 sq ft on 8,000 acres
Year Built1895
Rooms250
Floors4
Public AccessYes, it operates as a major tourist attraction.
Estimate ValuationHouse estimated at ₹1,300 Crores (Approx. $157 Million); estate valued much higher.
Unknown FactDuring World War II, the estate secretly stored priceless artworks from the National Gallery of Art.

5. Safra Mansion, São Paulo, Brazil

safra most big house in the world
Safra Mansion – A highly private, grand residence nestled in São Paulo, Brazil.

Shrouded in secrecy, the Safra Mansion is a colossal private residence in one of São Paulo's most exclusive neighbourhoods. Owned by the prominent Safra banking family, high walls protect this sprawling home, and very few details or photographs are publicly available, adding to its mystique.

Quick Facts about Safra Mansion

CategoryDetails
House NameSafra Mansion
OwnerThe Safra Family
LocationSão Paulo, Brazil
Size (sq ft) & Acre117,000 sq ft on 2.8 acres
Year BuiltMid-2000s
RoomsReportedly over 130
FloorsMultiple wings with varying floors
Public AccessNo
Estimate ValuationNot publicly disclosed
Unknown FactThe mansion is so large that it has two swimming pools, one indoor and one outdoor.

6. The One, Bel Air, California, USA

the one biggest mansion on earth
The One – A futuristic mega-mansion in Bel Air, designed for ultra-luxury living.

Marketed as the biggest mansion on earth upon its completion, "The One" is a modern mega-mansion with breathtaking views of Los Angeles. This property was designed to be the ultimate entertainment hub, featuring amenities that rival a luxury resort. It has a notable history of financial troubles and auctions.

Quick Facts about The One

CategoryDetails
House NameThe One
OwnerAcquired by Richard Saghian in a bankruptcy auction
LocationBel Air, California, USA
Size (sq ft) & Acre105,000 sq ft on 3.8 acres
Year Built2021
Rooms21 bedrooms, 42 bathrooms
Floors3
Public AccessNo
Estimate ValuationSold for ₹1,170 Crores (Approx. $141 Million) at auction in 2022.
Unknown FactThe home includes a 10,000-bottle wine cellar and a 30-car garage with two display turntables.

7. Witanhurst, London, United Kingdom

witanhurst largest private residence in world
The second-largest private residence in the UK

The second-largest private residence in London after Buckingham Palace, Witanhurst is a Grade II-listed Georgian-style mansion. Its ownership was a mystery for many years, but it is now believed to belong to Russian billionaire Andrey Guryev, who has undertaken extensive renovations.

Quick Facts about Witanhurst

CategoryDetails
House NameWitanhurst
OwnerAndrey Guryev
LocationLondon, United Kingdom
Size (sq ft) & Acre90,000 sq ft on 5 acres
Year Built1920
Rooms65 (25 are bedrooms)
Floors3, with a vast subterranean expansion
Public AccessNo
Estimate ValuationApproximately ₹3,735 Crores (Approx. $450 Million)
Unknown FactA massive two-level basement was added, featuring a 70-foot swimming pool, a cinema, and a spa.

8. Villa Leopolda, Villefranche-sur-Mer, France

villa leopolda largest house in the world
Villa Leopolda – A grand French Riviera estate known for its luxury and scenic views.

Villa Leopolda is a historic estate with a royal past situated on the glamorous French Riviera. Once owned by King Leopold II of Belgium, it is a landmark property known for its stunning terraced gardens and panoramic sea views. Its history and location make it the largest estate in the world.

Quick Facts about Villa Leopolda

CategoryDetails
House NameVilla Leopolda
OwnerPreviously owned by Lily Safra
LocationVillefranche-sur-Mer, France
Size (sq ft) & Acre80,000 sq ft on 18 acres
Year Built1931
Rooms19 bedrooms
FloorsMultiple levels are built into the hillside
Public AccessNo
Estimate ValuationValued at around ₹6,225 Crores (Approx. $750 Million) in 2008
Unknown FactThe villa was used as a filming location for Alfred Hitchcock's 1955 movie, To Catch a Thief.

9. Fairfield Pond, Sagaponack, New York, USA

fairfield most big house in world
Fairfield Pond – One of the largest private homes in the U.S., located in the Hamptons.

The primary residence of American investor Ira Rennert, Fairfield Pond is a massive beachfront compound in the Hamptons. The sheer size of the complex and its list of amenities caused controversy during its construction, but it was established as one of America's biggest houses in the world.

Quick Facts about Fairfield Pond

CategoryDetails
House NameFairfield Pond
OwnerIra Rennert
LocationSagaponack, New York, USA
Size (sq ft) & Acre62,000 sq ft (main house), on 63 acres
Year BuiltLate 1990s
Rooms29 bedrooms, 39 bathrooms
Floors3
Public AccessNo
Estimate ValuationApproximately ₹2,058 Crores (Approx. $248 Million)
Unknown FactThe property has its 164-seat theatre and a private power plant to service the estate.

10. Gemini Mansion, Manalapan, Florida, USA

gemini the world's biggest house
Gemini Mansion – A massive beachfront estate in Florida, known for its tunnels and tropical luxury.

This incredible tropical compound offers unparalleled privacy, with frontage on the Atlantic Ocean and the Intracoastal Waterway. A series of tunnels connects the property, including a main residence, two four-bedroom cottages, and several other structures, making it a truly unique estate.

Quick Facts about Gemini Mansion

CategoryDetails
House NameGemini
OwnerSteven Schonfeld
LocationManalapan, Florida, USA
Size (sq ft) & Acre62,200 sq ft (main residence) on 15.65 acres
Year Built1940s (substantially rebuilt)
Rooms33 bedrooms
FloorsVaries
Public AccessNo
Estimate ValuationPreviously listed for ₹1,618 Crores (Approx. $195 Million); sold for a lower undisclosed amount.
Unknown FactA series of air-conditioned tunnels run beneath the property, including one that goes under the main road.

Key Features of the World’s Largest House

The largest house in the world, Istana Nurul Iman, is equipped with features that are as grand as its size. Its facilities are designed to support a royal family and a functioning government.

  • Immense Residential Quarters: The palace contains 1,788 rooms, including 257 bathrooms, providing ample space for the royal family, guests, and staff.
  • Governmental Functions: It houses the Prime Minister's Office and serves as the seat of Brunei's government.
  • Religious Centre: A grand mosque within the palace can accommodate up to 1,500 worshippers.
  • Entertainment on a Grand Scale: A banquet hall can host up to 5,000 guests and is suitable for major state functions and celebrations.
  • Equestrian Facilities: The palace includes five swimming pools and air-conditioned stables for the Sultan’s 200 polo ponies.
  • Automotive Collection: A massive underground garage has space for several hundred Sultan's prized automobiles.
  • Opulent Materials: Designed by Leandro V. Locsin, the architecture incorporates gold, marble, and fine woods throughout, reflecting its royal status.

Your Dream Home Awaits with NoBroker

While the grandeur of the largest house in the world is awe-inspiring, creating a home that reflects your taste and luxury is entirely within reach. This is where NoBroker’s interior design services can make a difference. Our team of expert designers collaborates with you to craft personalised spaces that match your vision and lifestyle. We manage everything from the initial concept to the final execution, ensuring high-quality materials and transparent pricing. Let us help you build your version of a dream home that is perfectly tailored to you.

Frequently Asked Questions

Q: What is the largest house in the world, and where is it?  

Ans: The largest house in the world is Istana Nurul Iman, located in Bandar Seri Begawan, the capital of Brunei. It boasts an astonishing 2,152,782 square feet of floor space.

Q: How many rooms are in the world’s biggest house?  

Ans: The world's biggest house, Istana Nurul Iman, has a total of 1,788 rooms, which include 257 bathrooms, a banquet hall, and a mosque.

Q: Who owns the largest residential house in the world?  

Ans: The largest residential house, Istana Nurul Iman, is owned by its primary resident, Hassanal Bolkiah, the 29th and current Sultan and Yang Di-Pertuan of Brunei.

Q: Is Antilia bigger than Istana Nurul Iman?  

Ans: No, Antilia is not bigger than Istana Nurul Iman. While Antilia is incredibly large at 400,000 square feet, Istana Nurul Iman is more than five times larger, with a floor area of over 2.15 million square feet.

Q: What is the most expensive private residence in the world?  

Ans: While Buckingham Palace is often valued as the most expensive residence (estimated at approximately ₹40,670 Crores), it is technically owned by the Crown. The most expensive purely private residence is often considered to be Antilia in Mumbai, valued at between ₹8,300 and ₹16,600 Crores.

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