The scheduled monument consists of a ringwork and bailey 100 metres (330 ft) west of Kentend Farm.

Excavations at the site show that the castle consisted of a ringwork adjoined by a "single sub-rectangular bailey".

In their present condition the earthworks appear dilapidated, but a trial trench excavated in 1959 found a strong outer wall above the ringwork, surrounded by a spring-fed ditch which itself was revetted with timber and lined with clay.

Knocker and others have unearthed floor tiles, glazed and unglazed pottery, and other items dating from the early 12th to the 13th century.

These discoveries, with the condition and the form of fortifications, are consistent with the theory that the military purpose of the castle was short-lived, and it was converted into a manor by the de Keynes soon afterwards.