DILKUSHA Methodist High School will increase its capacity following an increase in applications received at the beginning of the year.
Principal Mereoni Kiti Motukiliu said the school needed to be extended to cater for more students planning to join the school next year.
So far, Mrs Motukiliu said the school catered for more than 500 students and would target 1000 students next year.
"At the moment, we have 15 streams and next year we should have 16 streams. "The demand is high and we cannot accommodate everybody," she said.
With the school into its second month, she said parents were still looking to enrol their children at the school.
She said they could not take any more because classes were full.
"We are trying to negotiate with our manager on the next project to build another double storey.
"We need a workshop, which we don't have, a physics lab and classrooms ready for a new stream next year."
Despite the school being 16 years old, she said the school had been doing very well.