The 20 most expensive billionaire homes in 2015 & their owners (+Photos)

6) One Hyde Park, London, UK – $221 Million

Owner: Rinat Ahkmetov – Net Worth: $12.5 Billion

It is the world’s most expensive apartment at $221 million. Owned by Ukraine’s richest businessman Rinat Ahkmetov, this apartment is located in posh Knightsbridge. This 25,000 sq ft apartment has bullet proof glass and 24-hour hotel concierge service. He bought in 2011.