The State Hospital Gatehouse was constructed in about 1879 at the entrance to the state hospital. Details of the building are drawn from illustrations in A. J. Bicknell's Detail, Cottage and Constructive Architecture, published in 1873. An entrance gate with similar features was constructed at the same time. It is unclear whether the building was ever actually used as a gatekeeper's lodge. By 1885the house was used as a residence for some privileged women patients. It was later used by hospital staff families for a number of years. In the early 1960s the house was restored, and became a museum.