400 George Street
Brisbane Australia
Height 149.91 m / 492 ft
Floors 37
Official Name

The current legal building name.

400 George Street

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, 2009

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.

Postal Code

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."

149.91 m / 492 ft
To Tip
149.41 m / 490 ft
141.23 m / 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.

# of Parking Spaces

Number of Parking Spaces refers to the total number of car parking spaces contained within a particular building.

# of Elevators

Number of Elevators refers to the total number of elevator cars (not shafts) contained within a particular building (including public, private and freight elevators).

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.

49,617 m² / 534,073 ft²
Construction Schedule



Construction Start



Structural Engineer
Grosvenor Australia Investments; Leighton Properties
Structural Engineer
MEP Engineer
Floth Pty Ltd

About 400 George Street

Recognizing that cities are dominated by office buildings in which corporate foyers, of limited public value or interest, consume much of the urban ground plane, this project shifts the typology of office towers from corporate institutions to public realms. In 400 George Street, the visitor experience is one of entering an “urban room”, a retreat from the city immersed in art. The space reveals the greater public invitation of accessible facilities, particularly an elevated food hall extending along and cantilevering over the entire George Street frontage, but also a full-time child care center and a series of social spaces.

The architectural form directly reinforces this ethos, sculpturally reaching out to the streetscapes at the base, and rising through increasingly calmer segments to the rooftop garden. These segments modulate the façades while responding environmentally to the tower’s climatic context, the responses and innovations being principal reasons for the selection of 400 George Street as the new home of the Queensland Government’s Department of Environment and Natural Resources.

Through the tower, 400 George Street comprises significant combined innovations including a high performance glass panel façade system which is subtly modulated and subdued given the historic context of George Street, Brisbane. A key environmental innovation was the combination of the condensate recovery and condensate pump energy optimization systems. These optimization systems have been calculated to save 700,000 liters of water, 110,000 kwh of electrical energy and 100,000 kg of C02 over conventional towers of comparable size. The condensate recovery system harvests water from the air handling units, while the condensate pump energy optimization controls the flow rate of condenser water through the chillers.

400 George Street illustrates how an office tower can contribute harmoniously to the high-rise context of the city without demanding visual attention, at the same time offering radical revision of the physical and social contribution that towers can make to the vitality of a city.