Lambourne was held as a manor of 2 hides and 80 acres by Leofsige in 1066, and by David from Count Eustace of Boulogne in 1086. In addition to the ploughland there were 20 acres of meadow here and woodland sufficient for 100 pigs. After the death of William Count of Boulogne in 1159 the tenancy in chief passed to the crown. The tenancy held by David in 1087 was held in the 12thc by Pharamus of Boulogne, the grandson of Geoffrey who was probably an illegitimate sone of Count Eustace. It passed on Pharamus's death to his daughter, Sybil, wife of Ingram de Fiennes, and then to their son William de Fiennes. In 1282 ir was sold to Robert Burnell, Bishop of Bath and Wells, by another William de Fiennes, perhaps the grandson of the first.
Long before 1300 the manor was subinfeudated to a family taking their name from it. Robert de Lambourne held land in the parish in 1203, and he or another of the same name held the advowson of the church in 1218. This family held the manor until well into the 14thc.
The Lockwood family whose memorials dominate the church bought the estate in 1702.