22 and 23, Castle Street

22 and 23 Castle Street is a pair of shops and dwellings, now used as offices, dating from the mid-18th century and altered in the 19th and 20th centuries. The building is constructed of brick and features hipped plain-tile roofs from the 20th century behind a parapet. It has a double-depth plan and is three stories high with a four-window range.

The ground floor consists of two wide, shallow, canted bay shop windows beneath a continuous fascia. These windows have glazing bars and glazed doors at both ends, set on a continuous low York stone plinth. The fascia is supported by unfluted Tuscan columns at either end and in the center, and it features a pulvinated frieze and a dentilled cornice. The first and second floors have 19th-century sash windows with painted stone sills and key blocks above flat-arched heads. The jambs and heads of the windows are made of fine orange brick, while the rest of the wall is constructed of blue or overburnt brick in header bond. There are storey and cornice bands made of the same fine orange brick. The parapet is plain and coped with flared headers in header bond. There are louvred openings in the middle of the shop bay windows for the basements.

Inside, No. 23 features a staircase that runs from the basement to the attic, with continuous stop-chamfered newels and column-on-vase balusters. The basement includes a stop-chamfered spine beam.