
Principal Sue Heath said yesterday projections for the next 30 years were for the school to double in size to 500 pupils.
The school's board of trustees had looked at several options, including expanding and renovating the existing community hall.
"Feedback tells us that people want to build a new, long-lasting and sustainable solution for the community,'' Ms Heath said.
Parent and architect Jessica Eyers said the idea was to create an "inspirational'' building that was low-energy and "comfortable all year round and kind to the environment''.

The building would be located between the existing hall and the Camp Hill Rd entrance to the school.
The cost of the project was estimated at between $1.9 million and $2.1 million.
No funding was available for the new hall from the Ministry of Education.
Concept "sketches'' of the building will be unveiled at the school's fair on Saturday.