• 30 St James's Square, London
  • 30 St James's Square, London
  • 30 St James's Square, London

30 St James's Square

30 St James’s Square is the redevelopment of two existing buildings on this historic site with the adaptive reuse and extension of the existing façades to provide contemporary workspace, meeting / collaboration space and an external terrace.

Working within the retained historic shell of the existing building, the basement was reused and new foundations minimised to reduce the amount of sub-structure and embodied carbon. The existing facades and bronze shop front windows were refurbished and upgraded to meet contemporary thermal performance and significantly reduce the use of new resources. A new set back zinc roof extension to the extended masonry facades provides uplift to the internal floorspace and allows a small but meaningful terrace to all sides of the building on the new ‘atelier’ top floor.

With an efficient core, shallow workspace and openable windows, the building achieves an ‘Excellent’ BREEAM rating and allows flexible subdivision with a mixed mode ventilation strategy. The scheme also provides a change of use and reintroduction of retail (A1-A2) on the Ground Floor facing Pall Mall, which with the new corner reception area and refurbished bronze window frames, once again provides elegant street frontage to this important address.


  • Project name: 30 St James's Square
  • Location: London
  • Services: Architecture, Interior Design
  • Contract Value: £9.4m


  • Structural Engineer: Price & Myers
  • MEP Engineers: KJ Tait
  • Development Managers: HanoverCube
  • Quantity Surveyors: Quantem Consulting
  • Contract Administrator: SG Consulting Ltd
  • CDM Consultant: David M Eagle
  • Contractor: 21 Construction
  • Fire Consultants: The Fire Surgery


  • BCO Awards - Shortlisted (2023)