12, Castle Street

No. 12 Castle Street is a pair of attached houses, now functioning as a single residence, dating from the early 18th century and altered in the early 19th century. The building is constructed from rendered limestone rubble and features a gable stack with a pantile roof that has two sections, the right section being higher. It has a single-depth plan with a 19th-century rear wing that creates an L-shape. Originally, it consisted of two houses accessed from a through-passage.

The structure is two storeys tall, with an attic and cellar, and has a three-window range. The entrance is located left of centre and includes an early 19th-century doorway. The ground floor has 8/8-pane sash windows, while the first floor features a left-hand casement and two late 19th-century right-hand 2/2-pane horned sashes, along with a left-hand gabled dormer. There are also two 18th-century stone-mullioned openings for the cellar.

On the rear elevation, there is a late 19th-century projecting brick wing, which includes an 8/8-pane weightless sash window and a cellar window with ovolo-moulded stone mullions. Inside, the building features a through-passage, a flagged cellar with stone steps leading down, and a 19th-century stair located at the left-hand rear.