It is located in the civil parish of Caterham on the Hill and right next to de Stafford School.

[citation needed] Sunnydown School was originally founded in 1949 on the Hog's Back at Guildford,[4] before relocating to Portley House in Caterham in 1983.

[1] The school's main building, Portley House, was built in 1856 for a wine merchant, Charles Dingwall.

[8] A significant majority of students at the school are diagnosed with a form of autism spectrum disorder.

The school deals with those with varying levels of disability and suits the learning environment to those.