Assistant principal Sue Fraser said the building could hold two classrooms, which would make it easier to fit about 135 students enrolled for 2018.

“We’re really pleased,” Ms Fraser said.

“The education department has certainly looked after us in providing another building for the school.

“It means that the 18 classes that we’ve got for next year will be accommodated.”

Ms Fraser said the school may need more portable classrooms set up after 2018 if student numbers continued growing.

The portable building was brought to the school on Tuesday.

In August the Department of Education and Training said measures to alleviate pressures on the school would be introduced as the SDS community waited for funding for an upgrade.

Education Minister James Merlino visited the SDS in June and said he would look at how to assist the school, which was on a “very difficult site with cramped conditions”.

Ms Fraser said the land the new portable building was on belonged to neighbouring training organisation SEAL.

“They’ve been very generous in allowing us to have that spot,” she said.

Getting adequate toilets for female staff members, and ultimately, getting funding of at least $18 million in next year’s state budget to build brand new facilities on a Wollaston Road site were the next steps, Ms Fraser said.

“We’re extremely hopeful that we do get the full funding for our new school,” she said.

The Andrews government promised to build a new SDS prior to its election in 2014, and at the beginning of 2016 land was purchased for $5 million.

A spokeswoman from the Department of Education and Training said the new classrooms would be ready for the first day of the new school year.

She anticipated the official handover of the buildings could be before the end of this school year.

“The government considers the needs of all schools when determining future priorities for the capital works program,” the spokeswoman said.