As well as being one of the biggest houses in the world, Fair Field has been mired in controversy thanks to Rennert. He was accused of using funds from MagCorp to fund the building of his luxury home. He was found guilty and forced to pay the company over $200 million in damages. 

12. Xanadu 2.0, Lake Washington, Seattle, United States (66,000 square feet)

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This mansion overlooking Lake Washington is owned by Bill Gates and his ex-wife Melinda. Nobody is quite sure who currently lives on the property. While it was the family home for many years, since the couple got divorced it is unsure who now owns the house. The mansion is a collaborative design by Bohlin Cywinski Jackson and Cutler-Anderson Architects of Bainbridge Island. 

The 60,000 square feet abode is estimated to be worth around $130 million. For some reason, it has only seven bedrooms but 24 bathrooms. There’s also a trampoline room, an art-deco movie theater, and a 60 feet outdoor/indoor swimming pool that has its own underwater music system. Another feature is the dome-shaped roof and private library. 

11. Pensomre, Highlandville, Missouri, United States (72,215 square feet)

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Located high up in the Ozark Mountains, this expensive house is one of the largest in America. Designed by Steven Huff, an astrophysicist and former CIA officer, Pensomre is built to withstand just about any natural disaster. Impervious to earthquakes, tornadoes, fires, and even bomb blasts, this five-story mansion is the type of building you think the President of the United States would feel safe in. 

This incredible construction is made from a unique insulated concrete form structure that results in 12-inch thick walls. There are 13 bedrooms and 14 bathrooms, but that’s about all we know about the interior. It’s still unclear whether the house is actually complete, with several lawsuits impacting the build.