The new building will replace four existing schools: Cwrt Sart Community School, Glanafan Comprehensive School, Sandfields Comprehensive School and Traethmelyn Primary School.
It will accommodate 1,100 secondary age pupils and 300 primary age pupils and 100 specialist places for pupils with additional learning needs.
Bouygues UK’s Regional Managing Director for Western, Chris Stevens, said: “The challenge is to deliver a modern educational facility for a large, diverse group of students, of various age groups and with different requirements; all on the one campus.
“It’s a complex project but we have a strong reputation for building similar, successful school projects in the region, including the award-winning Coleg Cymunedol Y Dderwen in nearby Bridgend and Penarth Learning Community.”
Work is underway to prepare the site for construction and the school is due to open in September 2016.