In the late 1960s, a 15th-century Grade II listed barn (called Heath Barn) to the south of the school fields was reconfigured and put back into use as a Music block.

In 1974 a "temporary" languages block was opened, which had been built on the land of the old canteen building which had been disused since 1969.

Sometime around 2017, an astro turf playing field was completed on the site's southern grassland.

In 2019, the Heath Barn building was sold, with the music department moved to a newly built two-storey mixed use block commonly referred to as "North block".

In 2018 the school was chosen by Hertfordshire County Council to expand to meet the growing need in Hemel Hempstead for school places; this expansion included a £10m investment in sports, music, science and dining facilities.