Most Expensive Home In America – $200 Million

Rennert Estate, Sagaponack

In 1994, American billionaire,Ira Rennert (net worth $5.2 Billion) picked up the 63-acre oceanfront parcel in Sagaponack that he dubbed “Fair Field.” In 1998, construction began on a 66,395-square-foot Italianate mansion with 29 bedrooms, 39 bathrooms, and a staff wing; the $100 million project also included a 17,000-square-foot garage (large enough to fit more than 100 cars), gym, lounge, game room, basketball court, handball court, billiard room, two indoor tennis courts, and playhouse with two bowling alleys.

Not surprisingly, when the plans were revealed, nearby residents were outraged and sued to stop the town from issuing building permits, arguing that Rennert planned to use it as a community center or even a synagogue, a violation of local zoning laws. (Rennert is a religious Jew.) He ended up prevailing and moved into the home in 2004. He also owns a $6 million pied-a-terre at 625 Park Avenue and a house in Israel, which he travels to aboard his Gulfstream V jet.

The assessed value of the Sagaponack property in 2009? A mere $170,167,400.