Radnor House and front railings

Radnor House is a semi-detached house, paired with No 13, built in the late Victorian Queen Anne style. It features painted stucco with red tile-hanging and deep eaved slate roofs. The building has three storeys and a three-window range for the pair. The front is triple gabled, adorned with bargeboards and terracotta finials. The gables are tile-hung, and the second floor juts out over three two-storey bays, supported by timber brackets on each side.

The second floor includes small-paned triple windows on the wall face, with the outer windows featuring a broad centre light with an arch and radiating bar tracery within a square head. The centre windows are plain square-headed sashes. Above the three canted bays is a moulded cornice, with tiling between the floors, red brick below, and windows that have small-pane glazing only in the top sashes. The windows are arranged in a 1-2-1-light pattern, and the first-floor sashes have a cambered head on each upper sash. The side walls are rendered, and there are porches along with remnants of truncated side wall stacks made of red brick.

The forecourt railings match those found throughout Penllwyn Park and are complemented by rock-faced rubble walls with stone coping. The low railings feature two horizontal bars, with standards that have finials and curving brackets under the upper bar. Curving ironwork is also present under the lower bar, topped with a finial.