There are plaster ceilings to the other offices with coved cornices and a ceiling rose in the eastern front office. Lighting is both suspended and attached fluorescent tubing. Architraves partitions are later, with some original architraves on original openings. Skirting is later, plain, brown and narrow. The first-floor windows are generally two pane double hung sash windows, with some single upper and lower pane windows and two internal windows to the partitions of the centre office. There are modern fixed windows to the mailroom high in the wall and a skylight to the store room of the mail room. Doors on the first-floor are a combination of predominantly modern flush doors and early French doors on the balcony and tower entry. Walls on the first-floor include partitions to the centre office, lunch room, locker rooms and cleaners room. The remaining walls are early rendered and painted brick with some timber veneer partitions at the stair landing to the mailroom. Walls on the bathrooms have a modern tiled fitout. Fireplaces on this floor are bricked in and the surrounds removed. North Sydney Post Office signage is limited to Post Office lettering on each facade at first-floor level and some standard Australia Post signs on the Mount Street facade. North Sydney Post Office is located within the North Sydney CBD which is largely comprises multi storey predominantly modern buildings. Landscaping is limited to uniformly positioned plane trees within the concreted perimeter pavement. As at 12 July 2001, The condition of North Sydney Post Office is generally good. However, there is some evidence of moisture damage and cracking to some ceilings of the upper floor and to the cornice of the ground-floor front entry. North Sydney Post Office has undergone a series of changes to the interior with little remaining original fabric. The exterior appears largely intact, with sympathetic additions. North Sydney Post Office retains the features which make it culturally significant, such as the elegant clock tower, arcaded porches, and pedimented portico, along with its overall style, scale and form. As at 12 July 2001, North Sydney Post Office is significant at a State level for its historical associations, strong aesthetic qualities and social value. North Sydney Post Office is associated with the development of postal services in the North Sydney area from 1854. As such, the current Post Office is associated with the growth of the area during the mid-nineteenth century. North Sydney Post Office is historically significant because it is also associated with the development of communications services in the North Sydney (originally called St Leonards) area during the late nineteenth century, as the growing population required improved services.