Edward Paul Giles, a Cambridge University graduate, founded Kensington School in 1966 with a clear vision: to offer a British education to Barcelona’s international community. The school began with a small group of secondary-level students, preparing them for the GCE ‘O’ and ‘A’ Levels, laying the foundation for the academic excellence that continues to define Kensington School today.

Kensington School established its primary department in 1968 and has grown steadily to its current size of around 270 students, aged 3 to 18.

The school relocated three times—from Calle Reina Victoria, to Cardenal Vives i Tutó, and finally in 1972 to Carretera de Esplugues. This was the last site, as it moved to its current, purpose-built premises on Carrer dels Cavallers in 1988. The new building was officially inaugurated by HM Queen Elizabeth II during her only state visit to Spain in October of that year.

The school was non-selective, a policy that exists to this day. It remains committed to offering a high-quality education to all students, regardless of background, nationality, ability, or academic level.

In 1979, the school became a founding member of NABSS—the National Association of British Schools in Spain.