As there have been a series of additions and alterations to Junee Post Office, the remaining original interior fabric on the ground floor has been altered substantially. The exterior has also undergone a series of changes over time. However, Junee Post Office retains the features which make it culturally significant, including architectural details such as the wide ground floor verandah and the hipped corrugated iron roof, as well as its overall form and style. The original Junee Post Office building was completed in July 1888, comprising a simple two-storey face brick building with a hipped roof and classically-styled entrance. In 1893 unspecified repairs were completed. During 1897-9, alterations and repairs were carried out. These included the enlargement of the public lobby, the installation of a twelve-foot counter, new glass screens and folding doors, front awning and balcony construction, installation of the clock below the awning to the left of the entrance and the ceiling of the old Post Office portion was removed and boarded. This is probably when the two-storey section of the building was extended to the north, if not earlier. The date of this addition has been determined from early photos and plans, where the original form of the building is the southern side and its two front chimneys can still be clearly seen. (See Images 7, 8 & 11.) The single-storey addition to the northern side was constructed and the front awning was extended to the full length of the building, . During 1927, unspecified alterations were carried out. Removal of the first floor balcony occurred , which saw the replacement of the French doors with double hung sash windows. Repainting occurred by Australia Post in sympathetic colours, and at about the same time, the standard Australia Post retail fitout occurred. Junee Post Office is significant at a State level for its historical associations, aesthetic qualities and social meaning. Junee Post Office reflects the development of the town and its increasing prosperity during the late nineteenth century as it evolved into a major rail centre in the region. It is also associated with the development of Junee Junction, as it is linked with the earlier post office established at the railway station in 1878. Junee Post Office was an important telegraph junction and relay station for the surrounding district, and provides evidence of the changing nature of postal and telecommunications practices in NSW. Junee Post Office has also been the centre of communications for Junee and the local area for over a century. Junee Post Office is aesthetically significant as it is a good example of the Victorian Regency style, with Federation period additions, and makes an important aesthetic contribution to the civic precinct of Junee.