14 Castle Street including forecourt railings

14 Castle Street is a two-storey building with an attic, gable-fronted to the street, and the entrance located on the north side. It is built of brick on a stone plinth, with the east gable end and north side finished in roughcast. The roof is covered with slate and features lateral brick stacks on each side, with the northern stack being truncated. The gabled front has a three-window range with closely spaced 12-pane hornless sash windows set in raised eared surrounds. There is a top-hung 3-over-6-pane window in the attic and a cellar opening at the plinth. The roof projects at the gable and is adorned with scalloped barge boards and a finial.

On the north side, there are two windows with a doorcase to the left of centre. The doorcase features panelled pilasters and moulded capitals that support a gabled hood on curved brackets, which contains a part-glazed six-panel door. To the right of the door, there are wooden cross-windows with quarry glazing, and two aligned above on the upper storey. The south side has similar windows with quarry glazing, including a large central cross-window at mid-level, likely a stair-light, with a two-light casement window aligned above and under the eaves. There is also a window to the left on each storey.

At the rear, there is a shallow bay that is roughcast and has a hipped swept roof. This bay features a late 20th-century plain-glazed wooden casement window in the gable, while the ground floor is not visible.

Surrounding the small forecourt in front of the gabled front, there are iron railings with alternate spear finials and stamped bosses on the rails, along with a gate at the northern end. The interior has not been seen.