Designs for the proposed new school in Wagga's north are underway, but union members have argued organisations representing teachers were shut out from the consultation process.
Wagga's newest public school will be situated in Estella on the southern end of the Charles Sturt University campus, with construction expected to begin later this year.
However, the NSW Teacher's Federation were excluded from the Project Reference Group that was established to assist with the planning of the new school.
Michelle McKelvie, president of the Wagga Teachers Association, said without union representatives raising important issues, this could have critical teaching implications.
"The credibility of professional and industrial input from teachers can only be guaranteed if teacher representatives are democratically elected by their peers and have access to the resources and advice of the NSW Teacher's Federation," she said.
"I would also ask the new Education Minister why the NSWTF were excluded to assist with the planning of the new school at Estella?
"All parents should feel confident that their local public school is appropriate for their children."
Wagga country organiser for NSWTF John Pratt said key issues impacting teachers might not have been raised.
"We would've liked the chance to see the plans and raise issues impacting teachers industrially, but instead we won't get the chance to see it until it's complete and seek to retrofit whatever dogs breakfast it is," Mr Pratt said.
"Teachers have campaigned to reclaim their classrooms, but compliance, conformity and data collection have taken time from teaching.
"Unfortunately every hour we spend uploading data is another hour we're not going over lessons with students or talking with a parent about how their child is performing.
"We want to bring back that time to teach and get rid of collecting data for district officers," he said.
Despite issues surrounding the lack of federation input, a Department of Education spokesperson said the state government is committed to working together with the community.
"The NSW government is committed to working together with the local school community and other stakeholders to deliver the best possible learning facilities for students," the spokesperson said.
Throughout the entire project life-cycle from planning through to delivery, the department will use a range of tools and activities for stakeholders to get involved and provide feedback.
"A community survey is currently underway to inform the planning process and information will also be provided through community notifications and website updates."
The spokesperson said new schools and major upgrades are delivered in alignment with the guidelines and the forecast completion is late 2020.
"Project governance includes setting up a Project Reference Group," they said.
"The PRG in this case includes teacher's representation as well as key stakeholders from the Department of Education and the school.
"The PRG is currently working through schematic designs, while images and impressions of the new school will be shared at an appropriate time."
The Daily Advertiser contacted architecture firm Hayball, designing the Estella school, but they did not respond to requests.