Sligo County Council have granted planning permission for a range of measures at Summerhill College.
Development will consist of two SEN classrooms, four classrooms, a wood technology room, two science laboratories, office, lockers, storage, toilets, stairs and a lift.
Construction of a part two storey, part one story extension will house the new rooms and facilities.
Landscaping, new steps and ramps along with relocating eight existing car spaces to accommodate the extension.