The current school building has been in place since 1965 and work on an upgrade started in 2006 with new wings added.
In July 2000, an arson attack on the school left the swimming pool in ruins and parts of the gymnasium was also badly damaged by smoke and water.
In 2002 the school was again deemed too small and two more prefabricated huts (one of six classrooms and the other of four) were added to the campus as well as plans for a major extension to the main building being put in place.
Work on the extension was scheduled to start in 2005 but was delayed due to problems with other schools in the projects.
The Badge of McLaren High School, including the motto “Ab Origine Fides” (Faith from the Beginning) is derived from the coat of arms of the Clan Labhran.