80 Mount Street, North Sydney is a concrete clad office building developed in the early 1970s with total floor area over 6,300 sqm. The building consists of 14 levels of commercial office space, with Ground Level accommodating small retail areas and 3 levels of basement parking.

CJP was engaged initially to survey the existing mechanical systems to provide a condition report of the system. CJP was later engaged to provide design for the extensive replacement of existing outdated pneumatic controls and equipment with new digital equivalent, various maintenance and rectification works on existing pipework and ductwork, replacement of one existing chiller with its associated pumps, replacement of existing boiler, and retrofit of the existing built-up AHUs.