206
Global
Height rank

Comcast Center

Philadelphia
Height
1
To Tip:

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).

296.7 m / 974 ft
2
Architectural:

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."

296.7 m / 974 ft
3
Occupied:

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.

266.7 m / 875 ft
1 2 3 Comcast Center Outline
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).

57
Below Ground

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

3
Height 296.7 m / 974 ft
Floors 57
Official Name
The current legal building name.

Comcast Center

Type
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.

Building

Status
Completed
Architecturally Topped Out
Structurally Topped Out
Under Construction
Proposed
On Hold
Never Completed
Vision
Competition Entry
Canceled
Proposed Renovation
Under Renovation
Renovated
Under Demolition
Demolished

Completed

Completion

2008

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

United States

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

Philadelphia

Function
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.

office

Structural Material
Steel
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.

Mixed-Structure
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.

Composite
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.

composite

Core
Reinforced Concrete
Columns
Steel
Floor Spanning
Steel
Height
Architectural
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."

296.7 m / 974 ft

To Tip
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).
296.7 m / 974 ft
Occupied
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
266.7 m / 875 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).

57

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

3

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

120

# 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).

35

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.

130,064 m² / 1,399,997 ft²

Rankings
#
206
Tallest in the World
#
33
Tallest in North America
#
31
Tallest in United States
#
2
Tallest in Philadelphia
#
79
Tallest Office Building in the World
#
21
Tallest Office Building in North America
#
20
Tallest Office Building in United States
#
1
Tallest Office Building in Philadelphia
#
121
Tallest Composite Building in the World
#
13
Tallest Composite Building in North America
#
13
Tallest Composite Building in United States
#
2
Tallest Composite Building in Philadelphia
Construction Schedule
2005

Construction Start

2008

Completed

Architect
Design

Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.

Structural Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.

MEP Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.

Other Consultant

Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).

Façade

These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.

Vertical Transportation
Owner
Comcast Corporation
Developer
Liberty Property Trust
Architect
Design

Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.

Architect of Record

Usually takes on the balance of the architectural effort not executed by the "Design Architect," typically responsible for the construction documents, conforming to local codes, etc. May often be referred to as "Executive," "Associate," or "Local" Architect, however, for consistency CTBUH uses the term "Architect of Record" exclusively.

Kendall / Heaton Associates
Structural Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.

MEP Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.

Contractor
Main Contractor

The main contractor is the supervisory contractor of all construction work on a project, management of sub-contractors and vendors, etc. May be referred to as "Construction Manager," however, for consistency CTBUH uses the term "Main Contractor" exclusively.

LF Driscoll
Other Consultant

Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).

Façade

These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.

LEED
Atelier Ten
Vertical Transportation

CTBUH Awards & Distinctions

10 Year Award 2018 Award of Excellence

2018 CTBUH Awards

CTBUH Initiatives

CTBUH Study Examines Tallest Buildings with Dampers

22 August 2018 - CTBUH Research

2018 Tall Building Predictions

17 January 2018 - CTBUH News

Videos

30 May 2018 | Philadelphia

Efficiently Sublime: The Tall Building in the Modern City

From its inception, Comcast Center was designed to exude a heightened sense of innovation and public engagement – qualities that align with both the tower’s...

Research

17 October 2016

The Space Between: Urban Spaces Surrounding Tall Buildings

James Parakh, City of Toronto Planning Division

This paper is intended to introduce the upcoming CTBUH technical guide titled “The Space Between,” which investigates the importance of publicly accessible spaces surrounding tall...

About Comcast Center

Comcast Center is the new headquarters for the Comcast Corporation, with typical floor plates ranging between 2,140 and 2,600 square meters (23,000 and 28,000 square feet). Taking the form of a faceted obelisk, the tower is clad in silvery high-performance glass with ultra-clear, low-iron glass at the building’s corners and crown. The Comcast Center and its south-facing, half-acre plaza straddles the underground tracks and concourse of Suburban Station —Philadelphia’s primary commuter rail gateway.

A 110-foot-high, light-flooded public winter garden connects the concourse with its shops and food hall to the tower and plaza above. The winter garden features a double-skin glass curtain wall with sunscreens and louvers which optimize daylight and views while modulating daily and seasonal thermal performance. Radiant heating, thermal extraction, and displacement ventilation combine to provide exceptional energy performance for this civic-scaled space. Three 3-story “sky atria” in the lower portion of the tower’s south façade overlook the plaza and provide tenants with unique and identifiable homes. The building is expected to receive LEED-CS Certification.

CTBUH Awards & Distinctions

10 Year Award 2018 Award of Excellence

2018 CTBUH Awards

30 May 2018 | Philadelphia

Efficiently Sublime: The Tall Building in the Modern City

From its inception, Comcast Center was designed to exude a heightened sense of innovation and public engagement – qualities that align with both the tower’s...

18 October 2016 | Philadelphia

The Space Between: Urban Spaces Surrounding Tall Buildings

This presentation was intended to introduce the upcoming CTBUH technical guide titled "The Space Between," which investigates the importance of publicly accessible spaces surrounding tall...

17 October 2016

The Space Between: Urban Spaces Surrounding Tall Buildings

James Parakh, City of Toronto Planning Division

This paper is intended to introduce the upcoming CTBUH technical guide titled “The Space Between,” which investigates the importance of publicly accessible spaces surrounding tall...

31 December 2008

Tallest Buildings Completed in 2008

CTBUH Research

Against the backdrop of global economic crisis, 2008 witnessed the most successful year of skyscraper construction to date, with more skyscrapers constructed globally within a...

22 August 2018

CTBUH Study Examines Tallest Buildings with Dampers

CTBUH has released a Tall Buildings in Numbers (TBIN) interactive data study on the world's tallest buildings with dampers.

17 January 2018

2018 Tall Building Predictions

Check out all of our 2018 Tall Building Predictions, and dive into the full 2017 Tall Building Year in Review data report.

31 December 2008

CTBUH Releases Tallest Buildings Completed in 2008

Against the backdrop of global economic crisis, 2008 witnessed the most successful year of skyscraper construction to date, with more skyscrapers constructed globally within a single year than ever before and the average height of the tallest ten constructed in 2008 rising to 319 meters.