Aberdare House

Aberdare House is a three-storey building featuring a three-bay front constructed in bathstone ashlar, with an entrance doorway surround made of Portland Stone. The building has a parapet topped with a low triangular pediment above the central bay and a cornice. It is adorned with four giant pilasters on the first and second floors, which rest on a plinth of four single-storey pilasters. These giant pilasters have moulded panels and concave Ionic-derived capitals, complete with aprons and hanging garland decoration. The central narrow bay showcases bowed tripartite windows on the upper floors, while the flanking bays feature wide tripartite windows.

On the ground floor, there is a central doorway with a segmental head, a large keystone, and Baroque-style decoration above. The ground floor pilasters flanking the doorway have sunk panels and capitals that also display hanging garland decoration. The end pilasters are banded. The tripartite windows are framed with classicizing wooden frames, and the aprons below them feature stylised ship decoration in the vents.

At the rear, which faces the former Glamorganshire Canal, there is a polygonal west front behind a railed wall. The building has group value with its surroundings. Inside, double six-panelled doors lead to a lobby that includes a marble dado, a black and white tiled floor, and marble steps.