The building is at 15 per cent of the current earthquake code which indicates a relatively high risk even though there is a low probability of an earthquake in Hamilton.
The bigger risk is of Hilda Ross House toppling on top of the Acute Services Building next door which houses the hospital's Emergency Department and four medical wards.
The board recently decided that because of the risk, Hilda Ross House would have to be demolished.
Planning is well advanced to handle the disruption demolition will have on the campus.
Early strip out works of the building will commence in July and major works will commence in October following the final relocation of Medihotel.
A portion of the building will be retained from level 1, B1 and 2 including, kitchen and Auditorium but cannot be used during demolition.
At the end of demolition, a new roof will go on to make it a two-level building housing meeting rooms, kitchen and Auditorium.