Current Largest Home in the World
The largest home in the world by total area is Antilia, a private residence in Mumbai, India. It is owned by Mukesh Ambani, chairman of Reliance Industries, and stands on a 400,000 square foot plot. The building covers about 400,000 square feet of gross floor area across 27 stories, making it the largest single-family home in the world by floor space and the most expensive residential building ever constructed. The project was completed in 2010 and is designed by Perkins and Will and Hirsch Bedner Associates, with structural engineering by Leslie E. Robertson Associates Forbes.
Size and Layout
Floor Area and Stories
Antilia has 27 habitable floors above ground, excluding the ground-level parking and mechanical levels. The total living and service space is estimated at 400,000 square feet, which includes multiple floors dedicated to parking for a fleet of cars, a health center, a ballroom, multiple living rooms, and dedicated staff floors. The vertical circulation core and service shafts occupy a central core, while the main living zones wrap around it with floor-to-ceiling glass on three sides ArchDaily.
Rooms and Amenities
The house includes approximately 168 rooms, with six floors of parking for 160 cars, a 50-seat theater, a 168-seat ballroom, multiple swimming pools, a rooftop helipad, and a dedicated temple floor. The top floors form the Ambani family's private living quarters, while the lower floors handle logistics, security, and staff operations. The building uses a centralized building management system to coordinate elevators, HVAC, and security across all zones LuxuryRealEstate.
Owner, Cost, and Valuation
The owner of the largest home in the world is Mukesh Ambani, whose net worth places Antilia among the most valuable private residences globally. The reported construction cost was around $1.5 billion, with additional hundreds of millions spent on interiors, landscaping, and ongoing maintenance. Valuations vary, but most real estate analysts place the current market value of Antilia above $2 billion, making it the most expensive residential property in the world by a wide margin Bloomberg.
Financial and Tax Context
Property Tax and Maintenance
Antilia is assessed under Mumbai's premium property tax regime for ultra-luxury residential assets, with annual property taxes estimated in the tens of millions of dollars. Maintenance costs are also significant, covering full-time staff, security, utilities, and specialized systems such as backup power generation and water recycling. The house is insured under high-value residential policies that cover the structure, contents, and business interruption risks for the Ambani family office SEC EDGAR.
Comparison With Other Mega-Mansions
By floor area,