Global architecture giant Gensler has lodged proposals to rework an early 1990s office building in the City of London, adding an extra storey and almost 3,800 sq m of additional office space in the process.

Gensler’s plans for workplace developer Helical would add a tenth floor to 100 New Bridge Street, which was designed by RHWL and completed in 1992, and replace the façades of three of the nine-storey building’s elevations.

Documents supporting the application, validated just ahead of the August Bank Holiday, suggest the plans would see 85% of the existing building’s structure reused and demonstrate an “exemplary standard” in refurbishment.

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