Abergavenny Railway Station, including down platform building and footbridge

Abergavenny Railway Station, comprising the main building on the town side, a secondary building on the southbound platform, and a connecting footbridge, dates from the 19th century and demonstrates group value as an example of a station built during the railway boom. The main building is constructed of pink semi-ashlar sandstone with natural slate roofs and stone stacks. A smaller secondary building has stone walls with a timber-framed front and a natural slate roof. The footbridge is of cast iron, wrought iron and steel construction.

The main building follows a single-depth central entrance plan in a plain Italianate style. It is two storeys high with five windows arranged in a 1:3:1 layout, the outer bays slightly projected. Single-storey pavilions at either end were originally conveniences and likely a parcels office, now a ticket office. The ground floor features round-headed windows and panelled doors, with 3 over 3 pane sashes, all bordered by raised surrounds, imposts and keystones. A projecting canopy with a fretted valance covers the three central entrance bays. A plat band separates the floors. The first floor windows are 3 over 3 pane sashes with segmental arched heads and keystones. The eaves have timber dentil brackets, and the roof is hipped with two ridge stacks. The end pavilions have been altered, notably the left-hand one, which has a 20th-century addition of a first floor. The platform side is similar but has a canopy covering all five bays. The ground floor openings are partially hidden due to the raised platform level, and the side pavilions have been altered. The internal rooms on the ground floor are modern and lack original features. The upper floor was not visible during a recent inspection.

The secondary building, located on the southbound platform, is a single-storey structure with a recessed platform elevation below a deeply projecting canopy. It features three bays with a central door flanked by windows, followed by central windows with a panelled dado of nine panels. A fretted valance runs along the eaves of the hipped roof. The interior is entirely plain.

The connecting footbridge is supported by cast iron columns typical of GWR design. The span over the main running lines was replaced in the late 20th century with a utilitarian steel plate-girder, while the span over the now-removed bypass freight lines retains the original wrought iron lattice girder design.