This project required the demolition of a 10 storey building and 2 basements within part retained sections of facade, and excavation for a 3rd level of basement.  The existing basement was 7-8 metres deep and the new 3rd level required another 5 metres to be excavated. The site is surrounded by narrow roads with poor access in a busy area of London. Supporting the facades and propping to support the existing basement walls…