Dancing Dragon Tower 1
Seoul South Korea
Height 446 m / 1,463 ft
Floors 88
Official Name

The current legal building name.

Dancing Dragon Tower 1
Other Names

Other names the building has commonly been known as, including former names, common informal names, local names, etc.

Yongsan IBD Boutique Tower 1
Name of Complex

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.

Architecturally Topped Out
Structurally Topped Out
Under Construction
On Hold
Never Completed
Competition Entry
Proposed Renovation
Under Renovation
Under Demolition

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.


A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.

A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.

residential / hotel / office

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."

446 m / 1,463 ft
To Tip
446 m / 1,463 ft
Floors Above Ground

The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).

Floors Below Ground

The number of floors below ground should include all major floors located below the ground floor level.

Dreamhub - Yongsan Development
Structural Engineer
Werner Sobek Group GmbH
MEP Engineer
PositivEnergy Practice


CTBUH Initiatives

Tongji University Faculty and Students Visit Chicago

1 November 2013 - Building Tour


19 September 2012 | Seoul


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From Jin Mao to Kingdom: Search for an Asian Supertall Vernacular

This presentation presents the evolution of Mr. Smith’s career as a designer of supertall buildings, from Shanghai’s Jin Mao Tower, completed in 1999, to Kingdom...


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See more


01 December 2017


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Designing High Performance MEP Systems for Supertall Buildings: A Review of Challenges and Opportunities

Craig Burton, Interface Engineering, Inc.

The design and construction of supertall buildings has grown dramatically in recent years. This area of practice has traditionally fallen within the purview of a...