The school bases its educational and religious values primarily on Evangelical Protestant principles.
Emmanuel High School opened its doors to 38 students enrolled in Grades 7 and 8 in September 1975.
Grades 5 and 6 were added in September 1983 until the complete school, from Kindergarten to Secondary 5 was formed.
In 1991, the school moved out of the premises it had rented for 16 years in Dorval in search of a permanent location.
After many renovations necessary to convert the property, the school moved in on Thanksgiving weekend of that year into its current building on Boulevard St-Jean in Dollard-des-Ormeaux.