List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
List of tallest buildings by height to roof
This list of tallest buildings in the world by height to roof ranks completed skyscrapers by height to roof which reach a height of 350 metres (1,148 ft) or more. Only buildings with continuously occupiable floors are included, thus non-building structures including towers, are not included. Some assessments of the tallest building use 'height to roof' to determine tallest building in the world, as 'architectural feature' is regarded as a subjective and an imprecise comparative measure. However, in November 2009, the CTBUH stopped using the roof height as the metric for tall buildings because modern tall buildings rarely have a part of the building that can categorically be deemed the roof.