The 15 most expensive houses in the world and who own them (With Pictures)

5. The Penthouse – $200 million

This apartment in London costs more than six-thousand pounds, or $9,500, per square foot. That’s absurdly expensive, considering that a square foot can hold like, a $1 jug of distilled water. But it comes with some good add-ons, including floor-to-ceiling windows, a panic room, SAS trained security guards, bullet-proof windows, 24-hour room service from celebrity chef Heston Blumenthal, an access to luxurious spas and squash courts.

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Even with all that, it would hard to justify blowing one-fifth of a billion dollars on an apartment; like, why not buy the entire state of Montana instead? But hey, to each his own.