Coordinates: 51°30′51″N 0°04′54″W / 51.514242°N 0.081583°W / 51.514242; -0.081583

1 Undershaft is a proposed skyscraper for the City of London designed by architect firm Avery Associates. The proposed tower would replace the St Helen's Tower and upon completion become one of the tallest skyscrapers in London and the United Kingdom.

Background and design

In January 2015, early plans emerged for a replacement office building of St Helen's Tower in Undershaft within London's Square Mile.[1] Designed by Avery Associates, the proposed development named 1 Undershaft would become the third tallest building in London and the United Kingdom behind The Shard and the stalled Bishopsgate Tower, also known as The Pinnacle.

Avery Associates along Simon Halabi, the original developer for the project, began working on the new development in 2010.[2] In 2011, Halabi sold the site to an as yet unnamed far eastern developer.[2][3]

No planning application has as yet been submitted for the development.[1]


Early designs are for a building which could reach 270m in height. As with 122 Leadenhall, due to its location, architects have created a sloping design in order to accommodate the protected sightlines of St Paul's Cathedral.[2]

Avery Associates said: “We have come up with a scheme that is sympathetic to the surrounding buildings.”[1]


1 Undershaft in the City of London.

See also

Notes and references

External links

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