Some peeling ceiling paint and minor cracking was also noted. Archaeological potential for the site is considered high. The original interior fabric of Yass Post Office has been changed and partially removed, particularly during the last thirty years as retail demands increased. However, Yass Post Office still retains the features which make it culturally significant, including the prominent tower with classical motifs, the pyramidal tower roof, the arched arcade, the stucco wall finish and classical detailing, along with its overall style, scale and location. Opened in 1884, Yass Post Office was a two-storey building comprising an office, sitting room, private office, four bedrooms, kitchen, pantry and store room. The clock turret, clock faces and mechanism were installed in October 1888. It appears that the southern end of the building beneath the pediment was an early addition, incorporating what was later to become the telephone exchange, although the date of construction is unknown. Some time after this addition was made, the clock faces were changed from white writing on a black background, to black writing on a white background, however the date of this change is also unknown. The ground floor arcade was infilled to expand the interior office space, date of construction being unknown, and a new arched entry was created below the pediment. Some time after 1927, a detached brick laundry was added to the west of the ground-floor residence and the kitchen expanded with the removal of the early laundry shown in 1927 plans. The date of the removal of the southern single-storey passageway addition to the residence, now an open walkway, is unknown. A face brick single-storey rear addition currently housing the lunch room was constructed to the north western corner of the building, possibly s. The clock mechanism was converted to an electrically driven motor in June 1980. In there was a renovation of the front retail area of the building, including the installation of post boxes at the base of the tower with new entries, covered verandah and steps. In there was a standard Australia Post fitout of the retail area, including display wall panelling and laminated counters, as well as the construction of the garage to the rear of the residence. During this phase of renovation, it appears that the verandah to the northern side was removed, the windows at the base of the tower restored and post boxes relocated and expanded to the southern side beyond the current entry porch. The expansion of the post office box area saw the demolition of an office and store rooms which were constructed in the former telephone exchange.