Hong Kong
Height 172.12 m / 565 ft
Floors 24
Official Name

The current legal building name.


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
Completed, 2010

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.

Structural Material

Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered a “steel” structure as the concrete elements are not acting as the primary structure.

Reinforced Concrete
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars.

Precast Concrete
Both the main vertical/lateral structural elements and the floor spanning system are constructed from steel reinforced concrete which has been precast as individual components and assembled together on-site.

Utilizes distinct systems (e.g. steel, concrete, timber), one on top of the other. For example, a steel/concrete indicates a steel structural system located on top of a concrete structural system, with the opposite true of concrete/steel.

A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used in a composite building’s core, columns, and floor spanning separately.

Official Website

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."

172.12 m / 565 ft
To Tip
172.12 m / 565 ft
143.15 m / 470 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.

Tower GFA

Tower GFA refers to the total gross floor area within the tower footprint, not including adjoining podiums, connected buildings or other towers within the development.

37,455 m² / 403,162 ft²
Tallest Retail Building in the World
Tallest Retail Building in Asia
Tallest Retail Building in China
Tallest Retail Building in Hong Kong
Tallest Mixed-material Building in the World
Tallest Mixed-material Building in Asia
Tallest Mixed-material Building in China
Tallest Mixed-material Building in Hong Kong
Construction Schedule



Construction Start



Chinese Estates Holdings
LWK & Partners; Tange Associates
Structural Engineer
MEP Engineer
Gammon Construction Limited


About The ONE

Constructed on the site of an aging 15 story office building dating back to the 1960’s, The ONE was constructed on a narrow site within a congested area of Hong Kong and is among the tallest retail buildings in the city. The tower is composed of two blocks, an 11 story portion containing shops and a cinema as well as the taller 24 tower housing additional shops and restaurants. In order to increase shopper circulation to the upper floors, food and beverage options were positioned towards the top of the building where open-air terraces allow for outdoor dining while taking advantage of the elevated views.

The slender tower was pulled back from the property lines to enlarge the surrounding sidewalks on the three street edges bordering the site. The narrow tower design created a slenderness ratio of 1 to 9, with an interior atriums further adding to the structural complexities of the building. The mechanical floors positioned at levels 15 and 16 provided an opportunity to include structural outriggers linking the perimeter frame of the tower to the narrow core, increasing the overall rigidity of the slender tower.

The building’s exterior façade is broken up into a series of stacked blocks with alternating façade treatments topped with exposed structural framework where the open are terraces and setbacks take place. The tower is then capped with an electronic billboard which can be seen from Victoria Harbour, visually reinforcing the location of one of Hong Kong’s premier shopping locations.