 Cardiff High School became a seven form entry school in September 1998, when a third feeder primary school, Roath Park, was added to the two existing feeder schools, Lakeside and Rhydypenau.In 2011, Marlborough Primary was added as a fourth partner school as the school increased to an eight form intake.As of 2016, it has a total pupil roll of 1635, of whom 450 are in the sixth form.