Heyne Tillett Steel Home
Low carbon mode
Project 1907

One Berkeley Street

Redevelopment and extension, combining two 8-storey reinforced concrete 1970s buildings to create an office block and hotel fronting Piccadilly. 90% of the structure was retained, with only the top level demolished to make way for a set back 2-story extension.

Location City of Westminster
Client Crosstree
Architect Allford Hall Monaghan Morris
Status Complete (2023)
Feature

Key features

Minimising strengthening to retained structure

The existing superstructure and raft foundation were justified for increased loads with minimal strengthening works.

Extensive research and investigations

Extensive archive searches and intrusive investigations were carried out to understand the capacity and stability of the existing building.

Complex site above London Underground

Ground movement constraints imposed on the development by underlying London Underground service tunnels were satisfied throughout.

Converting service yard into green space

The service yard at ground floor level is being transformed into a green and biodiverse public realm.

Temporary works

HTS carried out temporary works design for global stability, basement walls and the retention of a boundary wall.

Awards

2025 RIBA London Awards Shortlisted
2024 Building London Planning Award Best Mixed-Use Development Won
2024 Building Awards Shortlisted
2024 New London Awards Shortlisted
Photography by Tim Soar