There are no accurate records of the time, although information gathered from former employees says that such building would have been a summer retreat for president Getulio Vargas. Nevertheless, the Ministry of War granted the authorization for the construction of another building for said purpose some time later.

The building has, since 1995, been used as administration headquarters and has a first aid station, a cooperative general store, employees' living quarters and administration.

Between 1970 and 1988, the building was used as a visitor's center where specimens of the regional fauna and flora, Indian materials and photos of other units were exhibited.

In 1988, the facility was closed to public visitation and a remodeling was scheduled. Nevertheless, the building was used as an exhibition facility for traveling expositions due to the precarious conditions of the specimens being exhibited there. Currently, the ground floor of the Administration building has two meeting rooms, one seating 60 and another seating 40 participants, a permanent exposition room for the first hydroelectric power plant located next to the building on the Sao Joao river, a room for the Management and Conservation team which is responsible for all of the Unit's management, inspection, research and protection activities. Administration offices are located on the upper floor.