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X Marks The Spot Of The Tallest Tower In Town

The City of London Corporation has approved 1 Undershaft - AKA The Trellis
29 November 2019

The City of London Corporation has approved 1 Undershaft - AKA The Trellis - which will be the second tallest building in the Capital after The Shard and thus the second tallest building in Western Europe.

It was announced week ending November 29 that planning permission had been granted to Aroland Holdings for the development.

The building will be 289.94 metres tall but it will rise to a height of 304.94 metres AOD (Above Ordnance Datum), crowning the new cluster of planned skyscrapers in the Square Mile and in the surrounding areas.




The City of London Corporation’s Planning and Transportation Committee voted 19-2 to approve the project which will involve the demolition of the existing Aviva Tower, followed by the development of a 73 storey building.


Tallest in the Mile

The Shard sits outside of the City boundaries (at London Bridge) and thus 1 Undershaft, will claim the title of the tallest building in the Square Mile.



It will provide 130,000 square metres of office accommodation, as well as more than 2,000 square meters of retail space.

An estimated 10,000 workers will work in the building upon completion.

The project includes over 1,600 cycle spaces and 150 showers with changing rooms.

At the top of the building will be a free public viewing gallery, which will be served by dedicated lifts. The public viewing gallery will host London’s highest restaurant and have interactive learning spaces where schools and other groups can discover more about the capital, its growth and history.

The Museum of London has had discussions with the developer over a dedicated gallery at the top of the building, utilising 1 Undershaft’s height to show London’s development.


Public realm

At the base of 1 Undershaft, a new larger public square will be created. The building has an elevated reception, allowing pedestrians to walk freely beneath the building. Retail space will be created in the lower level gallery, with new restaurants, cafés and shops accessed from the public square


Helping with worker numbers

Chris Hayward, Chairman of the City of London Corporation’s Planning and Transportation Committee, said: “1 Undershaft is a truly unique building that fits in well with the City’s history, as well as our future ambitions for growth. Over the next thirty years I expect that we will need to deliver office space for more than 50,000 extra workers within the Square Mile, so this development is important in reaching that end goal."


Brexit and investor confidence

Hayward condinued: “This development shows the high levels of investor confidence in London’s status as a global city following our decision to leave the European Union.

“I believe this building will play an important part in increasing London’s attraction as the world’s leading financial centre.”


Floorspace maximisation

The offset design of the core and the rigidity provided by the external bracing means floor space has been maximised.


Eric Parry Architects

Eric Parry Architects have designed The Trellis.

Picture: The City of London Corporation has approved 1 Undershaft - AKA The Trellis which will be the tallest building in the Square Mile.


Article written by Brian Shillibeer | Published 29 November 2019


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