50 Baker Street development granted planning permission

Tenderstream member AHMM’s proposals for the redevelopment of 50 Baker Street and the surrounding public realm has received resolution to grant planning approval from Westminster City Council. The development will address the substantial historic deficit in office space within Westminster by delivering best-in-class space suitable for a range of tenants, while delivering on a shared ambition to deliver highly sustainable, future proofed and adaptable buildings.

The site at 38-70 Baker Street forms the last remaining undeveloped strategic city block site within the Baker Street District and is a joint venture between Derwent London and Lazari Investments, working with the Portman Estate. At ground floor, generously proportioned and flexible retail spaces allow for a range of subdivisions, suitable for a diverse mix of tenants. A new cultural and educational facility operated by the Baker Street Quarter Partnership will bring members of the community into the building, and will also provide a permanent home for an exhibition acknowledging the WWII activities of the Special Operations Executive. Developed in response to stakeholder feedback, the proposed façade adopts a varied palette and diverse architectural treatment. Planted roof terraces, setback roofs and extensive urban greening provide a considered roof plane. 

To the north of the site, a distinct but integrated building provides 17 bespoke residential properties, in a location set to complement the quieter residential streets away from Baker Street. With its private entry on Dorset Street, all residential properties will have private external amenity through the integrated balconies, which form an important part of the design.

Detailed design work continues, with site works anticipated to commence in early 2026.

Lucy Nordberg
Tenderstream Head of Research

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