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Queensland Number One,The world's tallest residential building General information Location Gold Coast, Australia Coordinates 28°00′22″S 153°25′46″ECoordinates: 28°00′22″S 153°25′46″E Status Complete Constructed 2002-2005 Use Residential Height Antenna or spire 323 m (1,058 ft) Roof 275 m (902 ft) Technical details Floor count 80 Companies involved Contractor Sunland Developer Sunland Q1 (meaning Queensland Number One) is a supertall skyscraper located in Surfers Paradise, on the Gold Coast. It is the world's tallest residential tower, the tallest building in Australia and Southern Hemisphere and the second tallest free-standing structure in the Southern Hemisphere, behind Auckland's Sky Tower. Q1 was opened in November 2005.[1] The landmark building has been recognised as one of Queensland icons during state's 150th birthday celebrations. Q1 has been identified as a potential terrorism target for the region.[2] For a short period of time, an apartment in the building, which was bought for AU$9 million by a Japanese restaurateur, was the most expensive ever paid for in Queensland At 322.5 m (1,058 ft) and with a roof height of 275 m (902 ft), Q1 qualifies as the world's tallest all-residential building when measured to the top of its structural point (spire), but is the world's second tallest behind Melbourne's Eureka Tower (roof height of 297.3 metres, 975 ft) when measured to its roof height and highest inhabitable floor. However, according to the ranking system developed by the US-based Council on Tall Buildings and Urban Habitat, the main criterion by which heights are ranked is the height of the top of the spire, qualifying Q1 as the taller. When completed, Q1 overtook the 21st Century Tower in Dubai, United Arab Emirates to become the world's tallest residential tower. It is currently in the top 50 tallest buildings in the world when measured to its structural point, dwarfing the Gold Coast skyline with the closest buildings to Q1's height being the 220 m (720 ft) North Tower of Circle on Cavill and the under construction 250 m (820 ft) Soul building. Q1 will lose its status as the world's tallest residential building sometime in 2010, when the 395 m (1,296 ft) 23 Marina in Dubai is completed, making it the second, and not soon after the third tallest residential building when the 414 m (1,358 ft) Princess Tower, also in Dubai, is completed. D1 is one of the numerous skyscrapers currently undergoing construction in Dubai. A sister tower of Q1, D1 (Dubai Number One) will be shorter than its Australian counterpart, but with a taller roof height. Unlike Q1, D1 will not have a spire. Construction is expected to be completed in 2011 From Wikipedia, the free encyclopedia