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September 2004: Contractors from Emaar begin the construction of the future world tallest building.
February 2007: Surpasses the Sears Tower with height of 500m.
May 2007: Surpasses the 449.2 m (1,474 ft) to which concrete was pumped during the construction of Taipei 101.
July 2007: Surpasses Taipei 101, with height of 509.2 m (1,671 ft).
August 2007: Surpasses Sears Tower antenna, with height of 527.3 m (1,730 ft).
September 2007: Surpasses Ostankino Tower Moscow with height of 540 m (1,772 ft) .
September 2007: Surpasses CN Towe in Toronto with height of 555.3 m (1,822 ft).
April 2008: Surpasses the KVLY-TV Mast with height of At 629 m (2,064 ft).
June 2008: Burj Dubai's height is now over 636 m (2,087 ft) being announced by Emmar properties.
September 2008: Surpasses the previous record-holder- of world tallest building the Warsaw Radio Mast in Konstantynów with height of 688 m (2,257 ft) , Poland.
January 2009: Current height of 818 m (2,684 ft).
The final height is still a clue as Emaar did not announce about it but it's confirmed that the Burj Dubai tallest man made tower will open on the 9 sept 2009 coincidence with the launch of Dubai Metro.