As a group the form, fabric and detailing of the Homebush station buildings characterise the type of construction and architectural style employed in late 19th century railway station buildings in the Sydney region. The 1890s "Standard Eddy" platform buildings all the characteristic features of this type of station building, namely cantilevered awnings with wide fascia and most importantly the purpose-designed location on island platforms. The 1890s overhead booking office is aesthetically significant as it has characteristic features of this type of station building namely the use of brick for construction, the small size of the building and the location of the building on the footbridge. The 1890s signal box is an in-operational signal box, with no signalling equipment and deteriorated interiors but it retains a number of features which typify this type of signal box, including inverted corrugated galvanised iron awnings above the operating level windows and landing and the full building width second floor landing which has a small timber compartment for a toilet at its rear.