Taieri College's 76-year-old administration block is turned to rubble to make way for a $3.9 million state-of-the-art administration block.
The 1532sq m building will house the school's reception area, staff room, administration offices, library and information centre, as well as eight classrooms.
Construction is expected to be completed at the end of next year.
In the meantime, the school will house its administration operations, library, staff room and principal's office in the school hall, and school assemblies will be held in the gymnasium and indoor training centre.