Crewkerne was a royal manor in 1086, and was held by Eadgifu before the Conquest. Its size was not recorded in the Domesday Survey, but its large size is indicated by the fact that there was land for 40 ploughs, 5 of them in demesne. The population was also notably high, consisting of 12 slaves, 26 coliberts (freedmen), 42 villeins and 45 bordars; a total of 125 heads of household and possibly as many as 600 inhabitants altogether. There were also 4 mills, a market, 60 acres of meadow, pasture half a league long and 4 furlongs broad, and woodland 4 furlongs by two. The Abbey of St Étienne at Caen held the church of Crewkerne in 1086, and this also included a substantial estate of 10 hides, 2 of which were in demesne, with 10 acres of meadow and pasture half a league in each direction. A knight held 3 of the 10 hides from the Abbot of Caen, along with the meadow and pasture described above. The church had apparently been a minster before the Conquest.
The market recorded in 1086 was held in 1274 by John de Courtenay and John de Lisle, and by Hugh de Curtenay and Isabel de Fortibus, Countess of Aumale, in 1280. A fair on St Bartholomew’s day was also recorded in 1280, held by the same people.