The decorative use of ripple iron in a large auditorium is considered rare and unusual. The Granville Town Hall is also a well-known local landmark in Granville. The place has strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons. Granville Town Hall is of high local significance to the Granville community. It has been used throughout its history as the venue for many major functions and festive occasions in the Granville area. Such activities have included regular meetings for social and cultural activities and these uses are ongoing. Dancing was, and still is, a regular activity held within the auditorium. The significance of the Granville Town Hall for the wider Sydney and NSW community is reflected in its listing in the following heritage schedules: the Parramatta City Council LEP, the Register of the National Estate and the Register of the National Trust of Australia (NSW). It has been the subject of conservation work by Parramatta City Council since 2000, reflecting the community's high regard for the building. The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales. The auditorium of the Granville Town Hall has some technical significance as an early example of extant ripple iron ceiling combining ventilation domes and exhaust cowls to provide air circulation. The archaeological potential of the site is considered to be low. This is due to the Town Hall being the first building on the site and occupying the whole site. The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales. Granville Town Hall is of state significance in being a rare example of a Victorian Free Classical government building built in the nineteenth century. It is thought to be one of only two intact nineteenth-century council chamber buildings extant in Sydney's west. The building is an almost intact, although extended, government building. It has retained its original character and nearly all its fabric, both internally and externally. The decorative use of ripple iron in a large auditorium is considered rare and unusual. The place is important in demonstrating the principal characteristics of a class of cultural or natural places/environments in New South Wales. Granville Town Hall is of state significance as a largely intact example of a council chambers building (1888) with an early auditorium (1900). Few such buildings were built and it is thought to be one of only two left in Sydney's west.