The $1.9 million visitor centre sits outside the predator-proof fence and will provide opportunities for further education about the sanctuary's inhabitants.
General manager Chris Baillie said now the containers were in place, the foundations would be laid, steel erected and the environmentally-friendly glass windows put in place.
"It's very exciting, as it has been a long time in the planning."
The aim was for the centre to be finished in July and opened to the public in September, she said.