Ardscoil Ris has evolved since it was established in 1963 and used the stables of Shelbourne House as its classrooms. Over time there were various extensions and additions. In 2009 a major €10 million extension and refurbishment programme began.
This has doubled the size of the school and provide a Social Area, Canteen, second Sports Hall, two new science laboratories, demonstration room, library and other specialists rooms and offices. Additionally there are two new astro-turf pitches to add to the sport halls and fitness studio. The completion of the building coincided with the 50th anniversary of the establishment of Ardscoil.