Wollondilly Anglican College's planning proposal to accommodate soaring student enrolment numbers has been approved.
The college's plan to 'rezone land and facilitate future development and expansion' of the school was recently given the green light by the Department of Planning, Industry and Environment (DPIE).
The school expects to have 1200 students enrolled by 2025, with its current enrolment at 900 students.
The DPIE's final report stated that the planning proposal had "strategic merit".
"The proposal has site specific merit, as it seeks to rectify a planning anomaly which will facilitate the expansion and upgrade of the Wollondilly Anglican College Campus," it stated.
"The proposal will provide 28 or more jobs for the region.
"The proposal will also formalise the protection for remnant bushland vegetation and biodiversity values of the land adjoining the school."
Wollondilly councillors unanimously supported the school's expansion plan at a meeting held earlier this year, however, they also raised concerns about potential traffic impact issues around the site.
Councillor Matthew Deeth said the college had been "a valuable asset to our community over the decades".
"I think that this is a great opportunity for expanding education within the shire," Cr Deeth said.
"I do note a couple of issues highlighted by the community particularly around traffic and the congestion that we find around the area when there are quite a number of cars coming through the one entrance.
"What this [proposal] does do is allows the college to put in a second entrance to ensure that we get much more streamlined management of the traffic around that area."
Cr Deeth said the council would also need to look at traffic solutions along the busy stretch of Remembrance Drive.
"I do think that council needs to have a much better look at improving road infrastructure around Remembrance Drive, particularly around the school," he said.
"It's certainly something that I have heard a lot of from parents at the college, that the traffic coming in and out of the school is quite a challenge.
"The school is doing their half and we need to look at what we can be doing to address the traffic challenges in that area."