100 Liverpool Street

London, United Kingdom, Europe

Completed · Commercial · Office Retrofit / Extension · Temperate · 2022

A retrofit that transformed a 1980s Broadgate office into a net-zero commercial building by retaining the existing foundations and much of the steel frame and adding three new floors plus green terraces. Embodied carbon was held to about 389 kgCO2/m2, below the LETI 2020 benchmark. It was shortlisted for the 2022 RIBA Stirling Prize.

Innovation highlights

• Retention of existing foundations and steelwork
• Measured embodied carbon below LETI 2020 target
• Net-zero operational target with BREEAM Outstanding
• Vertical extension over a reused frame

Innovations in the catalogue

• Foundation and Steel-Frame Retention With Vertical Extension
• Embodied-Carbon Measurement Against a Benchmark
• Green Terraces and Rooftops on a Reused Frame

Client / Developer

British Land

Architect

Hopkins Architects

Type

Office retrofit / extension

#retrofit #embodied carbon #office #structural reuse #net zero

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