1 Undershaft

London

Note: As this project is proposed, the data is based on the most reliable information currently available. This data is thus subject to change until the building has completed and all information can be confirmed and ratified by the CTBUH.

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    Metrics
Height 294.9 m / 967 ft
Floors 74
Official Name
The current legal building name.

1 Undershaft

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

Proposed

Expected Completion

2030

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

United Kingdom

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

London

Address

1 Undershaft

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

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."

294.9 m / 967 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).
294.9 m / 967 ft
Occupied
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
286.8 m / 941 ft
Observatory
283 m / 928 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).

74

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

3

# 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).

21

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.

180,366 m² / 1,941,443 ft²

Construction Schedule

2023

Proposed

2026

Construction Start

2030

Completed

Owner/Developer
Stanhope
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.
Eric Parry Architects
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.
WSP
Project Manager

The CTBUH lists a project manager when a specific firm has been commissioned to oversee this aspect of a tall building’s design/construction. When the project management efforts are handled by the developer, main contract, or architect, this field will be omitted.
Real PM
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).
BREEAM
WSP
Energy Concept
WSP
Environmental
AECOM
Fire
WSP
Geotechnical
WSP
Planning
DP9 Ltd
Stormwater Management
AECOM
Sustainability
WSP
Traffic
WSP
Waste Management
WSP
Wind
WSP
Owner/Developer
Aroland Holdings; Stanhope
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.
Eric Parry Architects
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.
WSP
Project Manager

The CTBUH lists a project manager when a specific firm has been commissioned to oversee this aspect of a tall building’s design/construction. When the project management efforts are handled by the developer, main contract, or architect, this field will be omitted.
Real PM
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).
Access
David Bonnett Associates
Aviation
Swanson Aviation Consultancy
BREEAM
WSP
Energy Concept
WSP
Environmental
AECOM; Gordon Ingram Associates
Fire
WSP
Geotechnical
WSP
Landscape
SLA
Lighting
GIA Group
Marketing
D-BOX
Planning
DP9 Ltd
Stormwater Management
AECOM
Sustainability
WSP
Traffic
WSP
Waste Management
WSP
Wind
WSP

Global News

16 December 2024

The City of London gives Approval for 74-Story Skyscraper After Revisions

The City of London Corporation has approved plans for 1 Undershaft, set to be a 74-story building located between the Gherkin and the Leadenhall Building....

 

Global News

16 December 2024

The City of London gives Approval for 74-Story Skyscraper After Revisions

The City of London Corporation has approved plans for 1 Undershaft, set to be a 74-story building located between the Gherkin and the Leadenhall Building....

28 October 2024

Revised Plans for 1 Undershaft Enhance Ground Floor and Public Spaces

On 21 October, 2024, revised plans were submitted for the 1 Undershaft proposal in London by Eric Parry Architects.  The 74-story building, led by developers...

06 February 2024

Revised Height Submitted for London Commerical High-Rise

A revised design and height for 1 Undershaft has been submitted to the City of London.  Designed by Eric Parry Architects, the update shows a...