Stogursey was an enclosure with several baileys, raised at the end of the eleventh century. A stone curtain and mural towers were built in the twelfth century. The castle was beseiged in the 1220's.
Some stonework remains.
An early Norman earthwork enclosure castle, raised on the south side of the River Tone and surrounded by a moat, received a rectangular stone great hall building inside its north-west perimeter in the very early 1100's. The castle belonged to the bishops of Winchester. Sometime in the second quarter of the twelfth century, further stone buildings were raised, including a great tower, rectangular in plan, with corner turrets, considered by local specialists to have been not dissimilar to the White Tower of London, though on a smaller scale. Of this great tower only the foundations remain. Further improvements were undertaken in the early thirteenth century, including a constable's tower, about 50ft by 33ft, which still has a vaulted undercroft, and a major reconstruction of the great hall which is particularly well documented.