In 1913, a private school for girls which originally opened in 1876, was taken over by Essex County Council opening with only fifty-four students as a girls' grammar school.
In 1927, the school moved from Queen's Road, Brentwood to its current site at Seven Arches Road, Brentwood. Extensions were added by 1937 to provide accommodation for 450 girls. During the grammar school era of the 1960s and early 1970s, it was the female counterpart of Brentwood School, which was a boys' direct grant grammar school at that time.
The school celebrated its Golden Jubilee in 1963 and then in 1965 plans were laid to convert it from a girls' grammar school into a co-educational school which, after extensive building works, happened in September 1978.
In 2013, the school celebrated its centenary year and became a voluntary aided school by converting to foundation school status forming the Brentwood Community Learning Trust.