 During the 15th century, Peveril became less important as administrative functions were moved elsewhere.Although other castles administered by the Duchy of Lancaster were repaired in 1480, there is no indication that this happened at Peveril.A survey conducted for the Duchy in 1561 revealed that Peveril was in a state of decay, and as a result, along with Donnington, was one of two castles that were subsequently abandoned.