East Gate, incorporating 3 Hole-in-the-Wall Street

East Gate is a Gothic-style gateway, largely dating from the 19th century, but built on a medieval layout. It faces east and is flanked by two single-stage, round towers that taper towards the base. These towers, constructed of coursed limestone—largely rebuilt on the south side—contrast with the polygonal towers of the castle and feature loops towards the front and at the parapet, a result of the upper stages being removed. The 19th-century gateway itself sits recessed between the towers and is constructed of snecked stone with freestone dressings. It features a segmental moulded arch with inset, half-height shafts of polished pink granite, topped with foliage capitals. Above this arch is a coped parapet, with a raised, gabled central portion containing a clock face. To the left of the south tower, above a relieving arch in the Town Wall, are two-story windows, all boarded at the time of inspection. The lower storey has two segmental-headed windows with voussoirs and a thick roll moulding, while the upper storey contains a two-light mullioned window installed in 1872, with plain chamfers.

The passage beneath the gate is roofed with a white-brick pointed tunnel vault. Its south wall has a two-light window, with shouldered heads to the left of the center, and a similar single-light window further to the right. The north wall mirrors this arrangement, with a two-light window on the left and a doorway with a shouldered head leading to a boarded door and overlight. A slate tablet commemorates the former site of the Exchequer to the right of the doorway, and a larger slate tablet on stone corbels, signed by Trevor Roberts, records alterations to the tower and its clock in 1833 to the left.

The west-facing elevation, looking onto High Street, replicates the detail of the east side, including a clock face in the parapet. The straight rear elevations of the flanking towers display features from 1872, including tall, three-light mullioned and transomed windows with shouldered lights, each set beneath a pointed arch. Set further back to the right, known as 3 Hole-in-the-Wall Street, is a double doorway with a shouldered lintel and replaced double doors, accompanied by a single window to its right. Two windows in the upper storey are also present, all with shouldered lintels.