1, Castle Street

No 1 Castle Street is a corner building dating from the early 19th century, featuring two fronts and a rounded section between them. It is part of No 2A Union Street. The building stands three storeys tall and has a symmetrical design with two windows facing Union Street and Castle Street, along with a curved section that includes one window. The Castle Street front has an additional window bay that is set back. Constructed of yellow brick, the top floor has a stuccoed cornice above each level, and there is a parapet. The building features long and short quoins at the corners of the symmetrical section. On the first floor of the Union Street front, there is a flattened bow window with three lights and a cornice above it. The glazing bars above the ground floor are intact. No 1, 1A, and 2, along with No 2A Union Street, form a group.