1 and 3, Castle Street

This property comprises one or possibly two town houses, later used as a shop, office, and residential accommodation. It was built in the mid-18th century and subsequently altered. The exterior is predominantly Flemish bond brown brick with a grey slate roof, with the ridge running parallel to the front and hipped to the east towards Lower Bridge Street.

The building has a basement and three storeys. A late 20th-century brick and timber shopfront features a small-pane window, recessed door with side lights, and an inserted six-pane fixed light. The second storey has a three-course floorband and five almost flush twelve-pane sash windows arranged in a 1-2-2 rhythm, with painted stone sills and cambered gauged-brick heads. The third storey mirrors this arrangement with five slightly smaller twelve-pane sash windows. Rusticated painted stone quoins mark the east corner, and the brick parapet has a moulded cornice, along with a cast-iron rainwater pipe and head.

The east face, onto Lower Bridge Street, descends eight steps and reveals a former undercroft with a lantern arch and replaced rail; it now features a modern shopfront. The first, second, and third storeys each have two nearly-flush twelve-pane sash windows, the third-storey windows being slightly smaller but similar in proportion; rendered floorbands are also present. Features such as sills, heads, parapet, and cornice are consistent with the Castle Street facade, and rusticated quoins are visible.

Internally, the undercroft has a barrel vault constructed of brick, dating to the 18th century. Number 3 features a closed string staircase with turned balusters connecting the second and third storeys.