By the time of the Norman Conquest, there was a Manor of Clewer, mentioned in the Domesday Book as Clivore and recorded as having a church and mill.

The Manor of Clewer continued to receive a rent of 12 shillings per annum from the Crown for this land until the 16th century.

[3] The present St Andrew's Church is of Norman construction[4] and it is traditionally believed that William I habitually attended mass there, as there was no chapel within the original castle.

It has a 14th-century chantry chapel to the memory of the second wife of the hero of the Hundred Years' War, Sir Bernard Brocas.

The family lived in the sub-manor of Clewer Brocas until rebellious activities obliged them to retreat[4] to obscurity at Beaurepaire in Sherborne St John.