12A St Peter's Square

12A St Peter's Square is a two-storey building with a gabled front, built in the late 19th century. The structure features box-panelling on an earlier stone base and is topped with a tiled roof. The upper storey juts out over the ground floor, which is also box-panelled but includes brick nogging. The entrance is on the left, consisting of double half-glazed panelled doors with small-pane glazing, accompanied by a similar side-light on the right. To the right of the entrance is a canted bay shop window with moulded mullions and a transom, above which is small-pane glazing. The jetty bressumer is supported by brackets and has a fascia.

The upper storey displays plastered box panels and passing braces, featuring a 4-light wooden casement window with decorative quarry glazing. The box panelling continues around the left and right returns. A tie-beam bears the date '1883' and is flanked by decorative rosettes, with a corbel above that may have supported a former sign. The gable is adorned with herring-bone studding, moulded barge boards, and a tall finial.

On the north side, the building is constructed of brick and shows signs of alterations. There is a boarded door with a segmental head at the centre, a 2-light small-pane casement window to its right, also with a segmental head, and a similar window above it, just below the eaves. To the left of the doorway, there is a shadow of a former gable, followed by a brick cornice, likely over a jetty bressumer. The ground floor includes a 3-light window with quarries, a single light on the far left, and a blocked opening to the right. The upper storey has two 3-light windows with quarries.

The south side is also of brick and features a saw-tooth brick cornice over a jetty bressumer. The ground floor has a 4-light wooden casement window with irregular small-pane glazing, while the upper storey contains a 3-light transomed casement window with quarry glazing. It appears that the building has been shortened, with the rear gable end now plastered over, revealing a cross-section. There is a cross-beam beneath the height of the side bressumers, supported by a central post. Possible remains of a fireplace are located to the left. The upper storey features an infilled central doorway flanked by two inserted shallow 2-light casements with quarries, and there is a small boarded opening to the attic.

Inside the shop, there is one plain cross-beam and a small fireplace on the north wall.