Year 7 and 8 pupils were taught in the lower school on Talcennau Road in the centre of Port Talbot, whilst Years 9, 10 and 11 were taught at the site on Bertha Road in Margam.

The lower school was built of red brick with a small tarmacked playing area.

[3] In 2009, Dyffryn became the first in the county borough to offer a savings facility for its pupils.

In 2015, Sally Burton made a donation to the school of her late husband's French dictionary[5] (Harrap's New Shorter French and English Dictionary 1977 edition).

[6] Dyffryn Comprehensive was well-known for its strict uniform policy, where the students would commonly wear a black uniform with a green and black striped tie.