The original Arran High School building was completed in 1939 and requisitioned for war use. It started being used as a joint Primary/Junior Secondary School in 1946. At this time the school was known as “Lamlash Junior Secondary”.

Until the early 1970s pupils wishing to continue their education to Higher level would have to board at Rothesay Academy for the latter years of their schooling. In the summer of 1985 a major project was started which incorporated the building of a new extension to the school, the upgrading of the original main building and the removal of the hutted accommodation.  The project was completed in 1987.

The old Arran High School building has now been replaced with a new state-of-the-art facility on the site of the former playing fields at the rear of the old building.  Opened in January 2008, it has signalled the beginning of a new era for education on Arran and strengthening of community facilities for the entire island community.