8 Sunbury Mews And 3 Sunbury Street

8 Sunbury Mews and 3 Sunbury Street is a two-storey Scots Baronial mews building, designed by John C Hay in 1886. It is situated on a narrow, wedged site at the head of Sunbury Mews and Sunbury Street, featuring a large circular tower with a conical roof. The building has prominent crowstepped gables on the east and west elevations, and it is positioned on ground that falls to the north. The exterior is constructed of coursed, squared pink sandstone rubble with some ashlar margins, while the ground floor of the tower and the east elevation are finished in sandstone ashlar. Notable architectural details include a base course, a moulded string course, and roll moulded openings. The ground floor windows and doorway on the east elevation have shouldered arched surrounds, with some being blind.

The west elevation, facing Sunbury Mews, has roughly four bays and features paired crowstepped gables on the right (south) side, along with another crowstepped gable to the left (north) that has gable apex chimney stacks. There is a small decorative roundel panel on the gable at the far right. The fenestration is irregular.

The east elevation, facing Sunbury Street, has roughly five bays and is flanked by large crowstepped gables, with a smaller gablet in the center that also has gable apex stacks and a ball finial. The gables are adorned with moulded square and round panels. The first floor has a roughly regular arrangement of windows, with some bipartite windows on the right (north) side.

The windows are predominantly plate glass in timber sash and case frames, with some multi-pane glazing in the timber sash and case windows on the east elevation. The roof is pitched, featuring a conical tower with lead ridges and a finial, covered in grey slates. The gable apex stacks are made of sandstone rubble with an ashlar cornice, and there are modern clay cans. The building also has cast-iron rainwater goods.