Working with the school and local community, a Matt Guy Liberals and Nationals Government will deliver a $13.6 million upgrade for Lyndhurst Secondary College.
The project will include new classroom blocks to replace existing facilities that are long overdue for upgrade.
Shadow Minister for Education, David Hodgett, said the investment would provide the school with the infrastructure it needs right now, and for the future.
"Our kids deserve the very best learning facilities, and our teachers deserve the very best teaching spaces."
"This is a priority for the Liberals and Nationals, to give our children spaces that spark creativity, nurture learning and encourage healthy physical, emotional and social wellbeing at every stage of their development."
Liberal Candidate for Narre Warren South, Annette Samuel, said she was proud to be fighting for students, parents, carers and teachers across the community.
"This expansion is for the students - world-class facilities where they can learn and grow is something that these students deserve."
"It's no secret that our community has been calling out for thoughtful investment over the years. I am here to answer that call, end the neglect and deliver for the people of Lyndhurst and beyond."
