MOST EXPENSIVE BUILDINGS IN THE WORLD

As of May 2012 , the 414-metre-high Princess Tower in Dubai is the tallest residential building in the world , according to the Guinness World Records . Next to the infamous Burj Khalifa , it is the second tallest building in Dubai , and features 763 residential units including one , two , and three bed apartments , duplexes , and high-quality penthouses . Construction on Princess Tower , owned by Tameer Holding Investment , began in 2006 and was completed in July 2012 .

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