The secondary school in Claregalway is hoping to expand further.
The Minister for Education has applied for planning permission for a new two-storey extension to the existing Coláiste Baile Chláir building.
The application also seeks permission for a new Claregalway Educate Together National School on the same site as the secondary school.
The extension to Coláiste Baile Chláir would provide for 2 special needs classrooms and a sports hall with pupil and staff facilities.
The application by the Education Minister also seeks permission for a new Educate Together National School.
This would consist of a new two-storey, 16 classroom primary school with 2 special needs classrooms and a general purpose hall.
There would also be 32 new car parking spaces for the primary school and 24 additional spaces for the post-primary school.
A decision is expected from the county council in September. (6/9)
Meanwhile, earlier this month, the county council granted planning permission for a new temporary pre-fab for classrooms at Coláiste Baile Chláir.
One condition of allowing the prefab accommodation is that it must be removed when the permanent expansion of the school takes place.