This diagram shows the five floors of Orford Castle, not counting the towers. The floor on the left is upper section of the second hall. Orford Castle has two main halls, each spanning two floors. All the floors are connected by the main spiral staircase [3]. The room [1] was used for water storage, collecting rainwater that fell on the castle. Some of the beams that supported the conical roof are shown [2]. Access to another room was via a wooden walkway built into the roof space.

The upper hall within the castle was used as the main residence of the lord or king. Several passages and rooms lead off the main hall. A kitchen [4] and toilets [5] are built into the western turret. A small room is built into the northern turret [6].

This floor is the upper section of the lower main hall. The small room built into the northern turret [7] is accessed via a small spiral staircase from the floor below. In the southern turret and forebuilding is the chapel directly above the entrance hall. The portcullis would have be raised into the chapel room. Further along the passage from the chapel if a room [8] for the chaplain to live with toilet as well.

The only entrance to the castle [9] is on the first floor. A portcullis would have provided extra protection for the doorway and would have be raised into the chapel in the room above. The room immediately inside the doorway has a hole in the floor giving access to a small room in the basement [14]. Turn left once inside the castle and you come to the lower of the two main halls [10]. The hall has a fireplace directly opposite the entrance and several passages leading to rooms built into the turrets. The rooms in the western turret are a kitchen [11] and toilets [12]. A passage to the south east leads to the main spiral staircase that gives access to the rest of the castle [13].

The small room in the basement of the castle [14] was accessed via a ladder from the entrance area on the first floor. It has an air shaft for ventilation and a passage leading to a toilet. As there are no other exits this small room could have been used as a cell for prisoners. The large circular room in the basement was used for storage. Recesses for extra storage are built into the west and north turrets. In the basement is the well. A well was an important source of water if the castle was attacked and besieged.