Height 87.78 m / 288 ft
Floors 19
Official Name

The current legal building name.

Other Names

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

810 West Wayman 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, 2020

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.


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."

87.78 m / 288 ft
To Tip
87.78 m / 288 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).

# of Parking Spaces

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

Construction Schedule



Construction Start



Sterling Bay


ALL Erection & Crane Rental Corp.

About Gr333N

The architectural design of Gr333N utilizes a horizontal and vertical mullion rhythm to establish a building scale and language that is fitting and appropriate in the historic context of Fulton Market and connects it to Chicago as a modern high-rise within the city’s skyline.

Architectural detail and materials – including aluminum storefront glazing, masonry, refined concrete walls and staircases, along with planned landscaping -- provide for a pleasant pedestrian and tenant experience with a scale that continues Green Street connectivity towards the north and access to Halsted Street to the east. All of which celebrates public engagement.

Parking is hidden within the podium base, and articulated through a feature “kinetic wall”, that will serve both as an enclosure and act as a large, movable art installation -- bringing additional excitement to the overall design experience. The top of the tower podium will provide modern amenity spaces, and intends to act as a “living room” for future employees within the building – connecting them to the buzz of the West Loop and the energy of the streetscape below.

In site planning (the overall massing and exterior materiality), the building design is a contextual response to the Fulton Market area itself. The building is positioned on the site to follow the “V” shape property line, which allows the building to be formally emphasized as two separate masses, connected by a transparent glass volume between them. The tower is graciously elevated by its podium base which visually corresponds to the scale of adjacent buildings.

Gr333N was designed to employ high-efficiency mechanical systems and additional sustainable practices, such as: a vegetated roof, destination amenity areas, state-of-the-art elevators, and a high-performing building envelope – delivering a sustainable addition to the West Loop.