B and E Halls were built separately in 1910 and 1915. They are designed similarly and both were 3-storey structures. The prison cells line both sides of the corridor, and at the end of the corridor are washing troughs and bathrooms. Running through E Hall is a straight and uncovered staircase that provides access to all floors, facilitating the staff on patrol.
There has been little change to E Hall since its completion. The structure and features are mostly retained. For example, many of the cells on the 3rd floor retained timber doors; the roof is pyramidal in shape and supported by timber beams. The conservation consultants hired by the Jockey Club recommended preserving the entire E Hall, making no changes to it so that the people may learn about the design of prisons in early years. The building beside E Hall was later added and was once used as a canteen and duty room. The basement is spacious and was once used as a launderette.
