World Biggest House – Top 10 Biggest House in the World : The largest house (home) in the world is the Istana Nurul Iman, Brunei, which contains more than 2.15 million square feet of housing, housing 1788 rooms. It is the property of the Sultan Hassanal Bolkiah and has 257 bathrooms, a banquet hall with 5,000 guests, and air-conditioned stables. It was a 1.4-billion-estimated palace, finished in 1984, the seat of government in Brunei.
The Major facts about the largest house in the world.
Name: Istana Nurul Iman (Palace of the Light of Faith).
Place: Bandar Seri Begawan, Brunei.
Size: More than 2.15 million square feet (est. ).
Rooms: 1,788, with 257 bathrooms, 44 marble stairs, 110-car garage.
Facilities: There will be a mosque, a 5,000-seat banquet hall and air-conditioned 200 polo pony stables.
Other Largest Homes
Lakshmi Vilas Palace: The largest private residence of an individual is often quoted to be Lakshmi Vilas Palace, though this is found in Vadodara, India, and is spread across a land of 500 acres (approximately). of grounds).
Antilia: It is, at a total of 400,000 feet, or 27 stories, smaller than Istana Nurul Iman, but a well-known, incredibly expensive residential tower in Mumbai.
Buckingham Palace: Deemed to be the most expensive, although a royal home rather than a definite house.
When defining the largest house, it will often be a matter of whether the houses in question are official royal families, or personal homes. The largest houses in the world in terms of square feet as of 2026 are listed here.
1. The largest Residential Palace of the World.
The Guinness world record of the largest residential palace in the world is in Istana Nurul Iman in Brunei.
Size: 2.15 million sq ft
Owner: Sultan of Brunei
Important Details 1,788 rooms, 257 bathrooms, 5,000 guests banquet hall and 110-car garage. It also has 200 polo horse stables, which are air-conditioned.
2. The Largest Single-Family Home in the World.
The largest private residence that has ever been constructed, much larger than Buckingham Palace, is often mentioned as the Lakshmi Vilas Palace in Vadodara, India.
Size: Covers 30.45 million sq ft (including the huge estate grounds).
Proprietor: The royal family of Baroda, Gaekwad.
Key Features: It is four times larger than the Buckingham Palace and has its own golf course, cricket ground and indoor tennis courts.
3. The Tallest and the priciest personal dwelling.
The largest single vertical structure is a single tower private house, Antilia in Mumbai, India.
Size: 400,000 sq ft
Owner: Mukesh Ambani
Main Characteristics: A 27-story high-rise is constructed to feature in case of an 8-magnitude earthquake. It contains three helipads, a 168 car garage, a snow room, which shoots artificial snowflakes and has 600 employees.
Global Ranking (by Flooring area)
Note: Although Buckingham Palace is larger than Antilia, it is not considered a house but a sovereign residence because it belongs to the British Crown.
Biggest 10 Houses in the World :
- Istana Nurul Iman Palace (Brunei): -2.15 million sq. ft., 1,788 rooms.
- Lakshmi Vilas Palace (India): ~30.45 million sq. ft. (including huge grounds/estate).
- Antilia (India): 400,000 sq. ft., 27-story vertical residence.
- Biltmore Estate (USA): 178,926 sq. ft., 250 rooms.
- Safra Mansion (Brazil): 117,000 sq. ft..
- Modern Versailles (USA): 85,000+ sq. ft..
- La Reverie (USA): ~84,600 sq. ft..
- Villa Leopolda (France): 50 acre estate.
- Qasr Al Watan (UAE): Presidential palace.
- Rashtrapati Bhavan (India): The Presidential residence of India.
Note: There are also very large historic royal residences on the lists that are technically not residences, like Buckingham Palace.
The large houses in the world may be difficult to rank since the list may include official royal houses (palaces) and other houses that are purely personal houses. Here are the top 10 largest houses in the world based on total floor area as of 2026.
The 10 Largest Houses in the World
| Rank | Name | Location | Size (approx.) | Type |
| 1 | Istana Nurul Iman | Brunei | 2,152,782 sq ft | Royal Palace |
| 2 | Apostolic Palace | Vatican City | 1,743,753 sq ft | Religious/Official |
| 3 | Quirinal Palace | Rome, Italy | 1,200,000 sq ft | Presidential |
| 4 | Buckingham Palace | London, UK | 828,820 sq ft | Royal Palace |
| 5 | Antilia | Mumbai, India | 400,000 sq ft | Private Home |
| 6 | Biltmore Estate | North Carolina, USA | 178,926 sq ft | Private (Museum) |
| 7 | Safra Mansion | São Paulo, Brazil | 117,000 sq ft | Private Home |
| 8 | Fairfield Pond | New York, USA | 110,000 sq ft | Private Home |
| 9 | Oheka Castle | New York, USA | 109,000 sq ft | Private/Event |
| 10 | Witanhurst | London, UK | 90,000 sq ft | Private Home |
Key Highlights of the Top 3
Istana Nurul Iman (Brunei): This is the residence of the Sultan of Brunei. It has the Guinness world record of the biggest residential palace. It has 1,788 rooms, 5,000 guest banquet hall and a mosque that can hold 1,500 people.
Apostolic Palace (Vatican City): It is a vast complex, the official residence of the Pope, though also home to the Papal Apartments, a number of government offices of the Holy See, and the Vatican Museums (with the Sistine Chapel being one).
Quirinal Palace (Italy): It is a building that stands on the summit of the seven hills of Rome and is presently the office building of the President of the Italian Republic. It has accommodated 30 Popes, four Kings of Italy and 12 Presidents.
Notable Private Residences
When official state and royal palaces are set aside, it is generally believed that Antilia in Mumbai is the greatest private residence in the world. The skyscraper, which is 27 stories tall, belongs to Mukesh Ambani and has a staff of about 600 employees to take care of, as well as other distinct options such as a snow room and 3 helipads.
