The Dorter, or dormitory, at Castle Acre priory is located to the south of the chapter house and lies on the east side of the cloister.
A vaulted room lay beneath the Dorter, with piers running down the centre of the space to support the roof. This seems to have been used as a ‘day room’ for reading by the monks. The northern end of the vaulted room may have been used as a parlour where talking was permitted.
The entrance to the Dorter was via a staircase located immediately to the south of the chapter house and accessed from the cloister.
To the south of the Dorter was the Reredorter or latrine block, connected to the Dorter by a bridge.