the apa building occupies a site with a frontage of to the south side of martin place. the block extends through from elizabeth to phillip streets, has a frontage on these two streets of and the main entry is located on the central axis of the martin place elevation. the building is limited by the height limit in force at the time. it consists of twelve main floors, a lower ground floor and basement and a set back roof (12th) floor with an intermediate tower floor and lift motor room over.