South Prior House including retaining wall and railings

South Prior House is a three-storey building that includes shops with accommodation above. It has a four-window front facing Clwyd Street and a one-window front towards St Peter's Square. The upper bay on the east side has a mono-pitch roof against No 9 Saint Peter's Square. The building is rendered and topped with a slate roof featuring a tiled crest, along with sill bands and raised shaped window surrounds.

The Clwyd Street elevation displays a nearly symmetrical arrangement, with paired central windows flanked by single windows in the wider outer bays. The windows are primarily 4-pane horned sashes, except for a wide tripartite sash on the left side of the first floor. The entrance is located to the right of the centre and features a gabled half-glazed timber porch with shaped barge boards and a finial, which contains a half-glazed panelled door and sidelights. To the left of the entrance is a large 4-pane sash window, and further left is a 20th-century shop front with a half-glazed door and a plain-glazed window to its right, framed by moulded pilasters. The capitals of the pilasters support a plain fascia and moulded cornice.

On the left side, where the ground level drops, there is a stone retaining wall topped with plain iron railings featuring fleur-de-lis finials, creating a terrace for the entrances. The elevation facing St Peter's Square includes a 4-pane sash window on the second floor, a canted oriel window with a hipped roof on the first floor, and a restored Victorian shop front at the corner. This shop front has a glazed corner door with an overlight, flanked by plain-glazed windows, all supported by pilasters with decorative capitals, a panelled stall-board, fascia, and a dentilled cornice.

The west gable end is made of brick and rendered at the gable. It features two small-paned sash windows on the ground floor, a 2-light casement window on the left side of the first floor, and a possible blocked opening on the right side, with a 2-light casement window in the attic. The interior has not been seen.