The Department of Education has issued a tender for a major extension at St Aidan's Comprehensive in Cootehill.
It recently received funding from the Department to allow for the works.
The school was built in the late 60s and currently caters to around 600 pupils.
The project will involve the construction of four specialist classrooms - an Engineering Room, Engineering Prep Room, Construction Prep Room, and a Home Economics Room.
The closing date for tender applications is Thursday, February 18th.