The Second Class platform building at Fairfield Railway Station has been altered considerably in terms of extensions to its south and west and new fitouts to its interiors but as it retains considerable amount of original fabric internally and externally and it has characteristic features of its this type of building and is a representative example. The "Third Class" platform building at Fairfield Railway Station, despite alterations and the additions has remained largely intact externally and is therefore representative of this class of railway buildings. Although the footbridge has been altered it retains the characteristic superstructure of footbridges and is representative of standard footbridge design.