In the courtyard between the north and west range is a timber-framed staircase outshut, dating from before the stone casing of the early fourteenth century.
The stair is modern and leads to a door on the first floor of the north range.
The outshut roof was probably repaired in the seventeenth century with an inserted purlin.

The northern range is roofed in six bays.
The western three bays were originally also built in the late thirteenth and early fourteenth centuries, while the eastern three bays of the northern range have timber work in the roof that indicates a fifteenth-century date.

The finish of the timbers of the three western bays in the north range is of inferior quality to that of the hall.
On the ground floor was a parlour now used as a dining room, located under the two most western bays.
The walls of this parlour vary in size.
The west wall contains a three-light Perpendicular window, the north wall contains three two-light ones.
The present fireplace is modern but there must have been a chimney since the fifteenth century.
East of the parlour, the floor level rises and there is a cross passage.
The door at the north end of the passage became blocked and was reopened only in the 1980s.
East to the passage, under the third bay from the west, is a lodged floor.
Originally, this bay was divided in a room to the north and a narrow room or corridor to the south.
The first floor of these western three bays originally served as a great chamber, the second most important room in a medieval English manor house.
This chamber was entered through a door from the staircase outshut.
It is dominated by two fourteenth-century two-light transom windows in the west gable and in the north wall.
The reveals of a third window also remain in the north wall.
The present fireplace has musician corbels from the fifteenth century.
The roof structure was similar to the open roof of the great hall until probably the seventeenth century, when the room was separated into two rooms, with a corridor on the south side of the eastern room.
These rooms now serve as the library and dining room respectively.

On the ground floor of the three eastern bays, the third bay from the east was probably open to the roof and is nowadays part of the same room with the third bay from the west (the room east of the parlour).
It has a small lancet window in the northern wall at the base of the chimney.
The two eastern most bays formed one room and has a modern partition from a corridor to the south.
The north and east walls are both from stone, and at the east end of the northern wall is a blocked window.
The other two windows are modern.
An overhang projected northwards to the room.
The present timber south wall replaced a stone wall, remains of which were found during plumbing operations in 1987-8.
On the first floor there was a solar in the second and third bay from the east which was to the west divided from the dining room by a timber-framed partition.
On the north side, there are two nineteenth- or twentieth-century Gothic windows flanking a large chimney with a fireplace.
There may have been a partition in the middle of the room before the fireplace was built.
The solar has a partition to the east behind which was a chapel and a door from the north to the east range.
In the courtyard between the north and west range is a timber-framed staircase outshut, dating from before the stone casing of the early fourteenth century. The stair is modern and leads to a door on the first floor of the north range. The outshut roof was probably repaired in the seventeenth century with an inserted purlin.
The northern range is roofed in six bays. The western three bays were originally also built in the late thirteenth and early fourteenth centuries, while the eastern three bays of the northern range have timber work in the roof that indicates a fifteenth-century date.
The finish of the timbers of the three western bays in the north range is of inferior quality to that of the hall. On the ground floor was a parlour now used as a dining room, located under the two most western bays. The walls of this parlour vary in size. The west wall contains a three-light Perpendicular window, the north wall contains three two-light ones. The present fireplace is modern but there must have been a chimney since the fifteenth century. East of the parlour, the floor level rises and there is a cross passage. The door at the north end of the passage became blocked and was reopened only in the 1980s. East to the passage, under the third bay from the west, is a lodged floor. Originally, this bay was divided in a room to the north and a narrow room or corridor to the south. The first floor of these western three bays originally served as a great chamber, the second most important room in a medieval English manor house. This chamber was entered through a door from the staircase outshut. It is dominated by two fourteenth-century two-light transom windows in the west gable and in the north wall. The reveals of a third window also remain in the north wall. The present fireplace has musician corbels from the fifteenth century. The roof structure was similar to the open roof of the great hall until probably the seventeenth century, when the room was separated into two rooms, with a corridor on the south side of the eastern room. These rooms now serve as the library and dining room respectively.
On the ground floor of the three eastern bays, the third bay from the east was probably open to the roof and is nowadays part of the same room with the third bay from the west (the room east of the parlour). It has a small lancet window in the northern wall at the base of the chimney. The two eastern most bays formed one room and has a modern partition from a corridor to the south. The north and east walls are both from stone, and at the east end of the northern wall is a blocked window. The other two windows are modern. An overhang projected northwards to the room. The present timber south wall replaced a stone wall, remains of which were found during plumbing operations in 1987-8. On the first floor there was a solar in the second and third bay from the east which was to the west divided from the dining room by a timber-framed partition. On the north side, there are two nineteenth- or twentieth-century Gothic windows flanking a large chimney with a fireplace. There may have been a partition in the middle of the room before the fireplace was built. The solar has a partition to the east behind which was a chapel and a door from the north to the east range.
The Abbey, Sutton Courtenay