Henning Larsen has submitted plans to redevelop a 1920s office building at 43-45 Portman Square in London. The proposal, created in collaboration with BentallGreenOak (BGO) on behalf of the Welput Fund, has been submitted to Westminster City Council for approval.

The proposed redevelopment includes a comprehensive retrofit of the existing building, incorporating ground-floor retail spaces, communal workspaces, and a new atrium.

The building is designed to operate with net zero carbon emissions and is anticipated to deliver a 72% reduction in energy intensity compared to current levels.

Portman Square, situated in Marylebone, serves as a link between Oxford Street’s shopping district and the residential Portman Estate. The site sits within the Portman Estate Conservation Area.

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