It was established as a private school in 1939 by Sir Ifan ab Owen Edwards and was originally named Ysgol Gymraeg yr Urdd.

The school expanded rapidly during the 1980s and 1990s as parents began to see the academic value in bilingual education.

[1] A 2016 school inspection report by Estyn found it to be excellent in all categories, and stated "The quality of teaching and learning experiences is very high, and support to ensure pupils’ wellbeing is an exceptional feature.

"[3] The Welsh children's author Mary Vaughan Jones was a teacher at the school between 1953 and 1958.

Aled Haydn Jones, a BBC radio producer on The Chris Moyles Show, was a pupil.