From the National Heritage List for England: Details The monument includes the earthworks and interior of a Norman ringwork, along with its two baileys or outer wards, situated on a chalk hill which forms part of the Kent Downs. The ringwork itself lies to the north west and is a roughly circular, raised, level area c.56m in diameter, which originally contained the main, residential buildings. These are no longer visible as standing features, but will survive as buried foundations beneath the modern farm buildings and the ground which surrounds them. The ringwork is enclosed by a dry, v-shaped ditch c.10m wide and around 2m deep, surviving as an earthwork to the south west and south east, with a causeway allowing access to the interior on its south eastern side. The profile of the ditch has become partially distorted by a small, modern quarry on its south western side and by modern rubbish dumping. To the south east of the ringwork is a semicircular, inner bailey in which the ancillary buildings, such as stables, workshops and soldiers' accommodation, would have been sited. This level area is defined by a bank 0.5m high and 0.4m wide, bounded by a dry ditch up to 14m wide and around 3m deep, although it has become partially infilled in places over the years. To the south east is a larger, outer bailey enclosed by a slightly curving ditch c.3m wide and 1m deep. This has been partially disturbed at its south western end by a small, modern chalk quarry. The ditch has a slight, inner bank c.0.2m high. The modern farmhouse, its associated outbuildings, those farm buildings situated within the protected area, and all modern walls and fences which cross the monument are excluded from the scheduling, although the ground beneath these features is included. Reasons for Designation Ringworks are medieval fortifications built and occupied from the late Anglo-Saxon period to the later 12th century. They comprised a small defended area containing buildings which was surrounded or partly surrounded by a substantial ditch and a bank surmounted by a timber palisade or, rarely, a stone wall. Occasionally a more lightly defended embanked enclosure, the bailey, adjoined the ringwork. Ringworks acted as strongholds for military operations and in some cases as defended aristocratic or manorial settlements. They are rare nationally with only 200 recorded examples and less than 60 with baileys. As such, and as one of a limited number and very restricted range of Anglo-Saxon and Norman fortifications, ringworks are of particular significance to our understanding of the period. Despite some damage caused by the construction of modern buildings and structures, by subsequent quarrying and dumping, and by tree roots, the ringwork and baileys at Stockbury survive as visually impressive earthworks and in buried form, and will contain archaeological remains and environmental evidence relating to the monument and the landscape in which it was constructed and used.