Threefold Architects has completed a 23,000 sq.ft retrofit of 12 Little Portland Street, a Grade II listed building near Regent Street, for The Crown Estate.

The project seeks to revitalise the 1920s neo-classical office building, incorporating flexible office spaces and upgraded energy performance measures while preserving its heritage features.

The design is intended to address post-Covid workspace trends, focusing on smaller, more flexible spaces suited to hybrid working. According to Threefold, the scheme aims to diversify The Crown Estate’s commercial portfolio by attracting a mix of tenants through inclusive layouts and amenities that promote collaboration and well-being. 

Significant upgrades have been made to the building’s thermal performance, with new mechanical and electrical systems installed, including a high-efficiency recovery condenser and modernised ventilation systems.

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