18 And 20, Castle Street

18 and 20 Castle Street are early to mid 19th century buildings located on the east side of Castle Street. Number 18 is part of an adjoining two-storey block, featuring roughcast exterior and one sash window on each floor, with only central glazing bars. The entrance door has four flush panels and a fanlight above. Number 20 is also two storeys tall and has three windows, with a roughcast finish. Its doorway is set in a wide recess and includes two round-headed side-lights, framed in a wooden case with Tuscan pilasters and an entablature. The door is a six-panel design with sunk upper panels, and the windows are sash with glazing bars. These buildings, along with Nos 2 to 8 (even), Castle House, and Nos 5 to 13 (odd) and 21 to 25 (odd) on the west side, form a cohesive group.