The school is co-educational, day and boarding, offering both weekly and flexi-boarding, and has 350 pupils aged 3 to 13 years.

[2] During the school's absence from Kent, its buildings became the temporary wartime offices of Hodder & Stoughton.

[3] The school did not, therefore, return to Kent after the war but relocated to Carswell Manor then in Berkshire,[4] a Jacobean country house with grounds.

It is a member of the Independent Association of Preparatory Schools and is administered as a charitable educational trust by a board of governors.

For many years St Hugh's was solely a boys' full boarding school but since 1977 it has also taught girls.