The current legal building name.

A complex is a group of buildings which are designed and built as pieces of a greater development.

CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.

The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.

The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.