Project 2724
55 Old Broad Street
A new gateway commercial building between Liverpool Street Station and the City of London which retains the existing basement and 5-story frame, taking it up to 23 storeys overall.
Location
City of London
Client
Landsec
Architect
Fletcher Priest Architects
Status
Planning approved
GIA
45,500m²
Feature
Key features
Retention of existing structure
The existing basement and 5-storey frame have been retained and refurbished to reduce embodied carbon.
Transferring loads to avoid Underground lines
Raking column and steel truss transfer structures at lower levels help avoid the Underground lines beneath the site.
Reducing embodied carbon
The pile layout was optimised and CLT slabs and re-used steel were incorporated to save the equivalent of 1,900 tonnes of carbon.
Complex site of archaeological interest
Early investigation works and Historic England approval were required, particularly regarding the Grade II-listed Victorian bath house on the site.
Structural embodied carbon
240
kgCO2e/m²
40% of the existing building retained
Material intensity
975
kg/m²
01-03
Existing
01-03
01 - 12
02 - 12
03 - 12
04 - 12
05 - 12
Existing
06 - 12
Demolition
07 - 12
Proposed
08 - 12
09 - 12
10 - 12
11 - 12
12 - 12
