The school has been locked down nine times in the past three years due to bomb threats, protests and verbal abuse from clients of the existing FACS building across the road.

Parents are concerned a government plan to open a "one-stop shop" will exacerbate existing problems and have called for a better fence to be erected around the school.

Sitting member Noreen Hay met with the school's P&C president Josh Brightman and said she would support their campaign.

"I'll be making a strong case to the next government of NSW, whether that is Liberal or Labor, for Coniston Public School to have its fence upgraded," Ms Hay said.

Independent challenger Arthur Rorris said he was a "big advocate" for schools.

"The safety, security and wellbeing of staff and students should be our primary concern and I would urge consultation with the school community ... to identify what those measures are," Mr Rorris said.

Liberal candidate Cameron Walters took a similar line and said if elected he would work with the school to implement strategies that ensured a safe environment.

A NSW Department of Education spokeswoman said its safety and security directorate was responsible for recommending schools for inclusion in its "capital works fencing programs".

The process was based on comparative levels of risk and conducted at the start of each financial year.

"This ensures that schools that are most in need are the first recipients of security fencing," the spokeswoman said.

The spokeswoman said security risk assessments identified strategies that could be implemented to minimise concerns, and Coniston Public School would be provided with an updated assessment.