Domen Gastell is a ditched mound measuring 38-43m in diameter and about 9.5m high, having a summit diameter of 10-12m across. The mound has a counterscarp on the south and south-east, with a roughly triangular banked and ditched bailey, generally 46m by 20-40m, with an east-facing entrance,set on the north-east, between the motte and a river terrace scarp.
