10. Princess Tower, Dubai, United Arab Emirates, US$2.17 Billion
The 101 story Princess Tower in Dubai is the tallest residential building in the world at a height of 414 meters. It is also the second tallest building in Dubai, next to Burj Khalifa. The total construction cost of this residential skyscraper estimated at US$2.17 billion. The construction of this building was started in 2006 and took six years for the completion. The Princess tower features 763 residential units, 8 retail units, 957 parking units and 13 elevators.