Roger Stirk Harbour & Partners is preparing to open its first office in the US later this year, its fourth overseas outpost after Paris, Shanghai and Sydney.

The practice, which designed the 80-storey 3 World Trade Center in New York that replaced a hotel destroyed in the 11 September terrorist attacks 20 years ago, is currently finalising its plans for a New York office ahead of the opening which is expected this autumn.

The firm is currently sorting out visa applications for staff and is close to signing a lease on a property in the financial capital of the US.

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