Antilia is the 27 floors personal home.That is the most expensive home in the world.

Name of Building- Antilia
Type- Personal Residential
Location- Altamont Road, South Mumbai
Construction Started- 2007
Completed- 2010
Opening- 28 Oct 2010
Cost- Officially $500-700ms
Floor count- 27 (equivalent to 60 floors tower)
Floor area- 400,000 Square Feet of Living Space
Elevators- 9
Owner-  Mukesh Ambani
Architect- Perkins & Will
Structural engineer- Sterling Engineering Consultancy Pvt. Ltd.
Main Contractor- Leighton Holdings
Source-Wikipedia