As at 25 October 2010, Fairfield Railway Station has State significance as one of the earliest railway stations established during the first phase of NSW railway construction in the 1850s. Opened in 1856 the station was one of only two stations at the time of line construction, the other being Liverpool, on the section of the Main South Line constructed between Granville and Liverpool. It is also historically significant as the existing 1850s former station master's residence is the oldest surviving railway building in NSW and possibly Australia. The building is also rare within the Sydney Metropolitan area being one of only three known examples and, along with the 1860s and 1890s platform building, it is able to demonstrate the development of the railways from its early phase of operations through to the 1890s duplications of the lines. The various changes to the station demonstrate its evolution from a rural railway station to a suburban service and reflect the growth and change of the local area. The 1918 footbridge is a common type of structure found at suburban railway stations and together with the platform buildings and former station master's residence it forms a recognisable landmark in the local area.