Fraser Bond are the leading lettings and property management agents for Old Sorting House - London N1. Old Sorting House is an office building in Islington, London N1. - Headquarters office building with a net internal area of 20,400ft2 /1,895m2 - Small business suite of 1,100ft2 /102m2 - 1 x one bedroom self-contained private apartment of 732ft2/68m2 - 1 x two bedroom self-contained duplex of 1,270ft2 /118m2 History 2018 - The building is redeveloped to the designs of Ben Adams Architects. 2016 - Acquired by Martin’s Properties. 1855 - Built in 1855 by the Postmaster General as a landmark.