Nantyderry Station House

Nantyderry Station House is a two-storey rectangular building constructed from squared snecked rock-faced sandstone blocks, featuring a dressed band between the floors and a Welsh slate roof. It has single-storey lean-to wings on either gable. The entrance front includes, from the left, a 2 over 2 pane sash window in the wing, a 2 over 2 pane sash with a horizontal division and an octagonal head in the main block, a plank door beneath a glazed Gothic porch, another window with a shaped head, another plain sash, and a small single light 'Norman' type window in the wing. The upper floor features a central gable with two sashes that have shaped heads. The roof is steeply pitched with tall brick stacks at the ends.

On the trackside elevation, there are windows with shaped heads on the ground floor and two gables with narrower sashes above. The left-hand wing has a shaped head replacement small pane window. The platform canopy is still present, although it has been infilled below with a glazed conservatory. The canopy consists of four bays with drop finials. The platform remains intact, along with a Great Western Railway lamp hut. The interior was not inspected during the resurvey.