Wall with corner towers and gatehouse, surrounded by moat. c.1341 (date of license to Crenellate) by Bishop Ralph of Shrewsbury. Wall of local stone rubble with ashlar copings and other dressings, average 5m high. The gatehouse in random rubble with Doulting stone dressings with lead flat roof behind crenellated parapets. 3 storeys, the gateway bay flanked by two rectangular towers. The centre gateway has a 4-centre arch in a rectangular recess with carved spandrels, part of the portcullis and the chains of the drawbridge (now connected to a modern fixed bridge) remain, arch has a pair of possibly C14 gates with an inserted wicket of c1600. Above this a single lancet with cusped window set deep inside. Inside the gateway is a ribbed vault and carved head boss and corbels. In E wall of this space a small oriel window, presumably for the gatekeeper. Side doors in the projection of the towers south of the minor gate arch.
The enclosing wall with its moat helps to provide what Pevsner calls an "...exquisite beauty of setting...". Observed in a painting by Walter Crane of 1893.