Before the construction of the original school building in Riverforest in 1994, Confey College teachers taught in nearby Scoil San Carlo on a part-time basis after the primary school closed for the day at 3 pm. After lobbying from teachers and parents, prefabricated buildings were provided on the site which the school currently occupies. With the growth of Leixlip and an expanding teenage population, these facilities were inadequate. With much further teacher and local pressure, what is now the older of the two school buildings was built in 1994, with three prefabs remaining in use as classrooms. The remaining prefabs were removed in 2001 with the construction of a new, larger building. In February 2011, Mary McAleese made a presidential visit to the school in honour of its 25-year anniversary.
Musical productions
The school produces annual musical productions. Past shows include Jack and the Beanstalk, Sleeping Beauty, Joseph and the Amazing Technicolour Dreamcoat, Grease, Back to the 80's, Sinbad, Cinderella and Treasure Island. The musical productions were halted in 2014 and instead replaced by a talent competition named 'Show Stoppers!'. But in 2015 the TY group put on a musical Little Shop Of Horrors. The Transition Year group of 2016-17 displayed the musical Hairspray'd. In December 2018, the Transition Year group of 2018-19 performed the musical FAME JR. The transition year group of 2019-2020 performed the musical All Shook Up from 11-13 December 2019.
Green-Schools
Confey College has a Green-Schools committee made up of students and teachers. The committee started in 2009 and has conducted surveys, worked with a local Councillor on cleanup days and has plans to make a garden to mark the school's 25th birthday. The school was awarded its first green flag in 2013 and its second flag in 2014. The committee is currently working on gaining the school's third flag.
Sport
Confey College have an all-weather 'astro turf' pitch. The pitches are used for school teams as well as PE. In hurling, Confey College secured the Senior Leinster 'C1' Championship in 2010, defeating St. Vincent's C.B.S. 3-11 to 0–2. In 2010, Confey College's futsal team won the Kildare & Leinster Post Primary Schools Futsal title. They defeated St. Peter's College of Dunboyne 1–0 in the final.
