The Leadenhall Building

City of London, EC3
British Land / Oxford Properties JV
Post completion; Practical completion 2014
600,000 sq ft NIA
£250m Construction cost
Office, retail, public realm

RSHP, Architect
Arup, Engineers
Laing O’Rourke, Contractor


The 225 m, 52-storey Leadenhall Building is a project realised by new perspectives and practical innovations at every stage. At feasibility stage, M3 created a brief that optimising the potential of the emerging Eastern Cluster and identified value adding opportunities for and around the site. At concept stages, the building externalised the core for more flexible floorplates, and inverted the lower levels for a better public realm. Detailed design interrogated and embraced construction technologies to ensure buildability to enhance the design. Demolition took place from the bottom up. Construction on the constrained site was 80% pre-fabricated and sequenced seven floors at a time. M3 selected and steered the team throughout the challenges to create a building that is distinctive and contextual, on the ground and the skyline.


Related projects
St Helen's Square

Project highlights


  • Building up to the property line on all elevations
  • Dealing with the challenge of planning views of St Paul's
  • Gaining a resolution to grant consent at the first committee meeting
  • Negotiating agreements with adjoining owners and tenants
  • Managing the first "bottom up" demolition in the UK
  • Orchestrating a project restart following a two year break in construction programme
  • Implementing a change in contract procurement from CM to Design and Build
  • Achieving record rents for the City of London
  • Leading the incoming tenant liaison process including approval of state of the art fit outs