Mace will start work this spring on the 350,000 sq ft landmark office HQ renovation, which has been designed by architect Stiff + Trevillion to meet the needs of modern occupiers.
The nine-storey building revamp includes a 1,500 sq ft rooftop pavilion with views of St Paul’s Cathedral.
Presently Keltbray is stripping out the building with a target of diverting 100% of waste from landfill.
The £130m development is on track to become an exemplar for retrofit in the City and is targeting net zero carbon in both construction and operation thanks to an ambitious reuse and retention strategy, which seeks to preserve 98% of the existing structure.
The building will be all-electric, with no fossil fuel or gas boilers on site, and 100% green power purchase agreements (PPA) are being used.
It is targeting a 4.5* NABERS rating and BREEAM Excellent.