Guest dreamed of establishing a small boarding school in the country, and did so with the support and financial assistance of his father-in-law, Sir Byron Edmund Walker, a Canadian businessman.

Today, Appleby is a co-educational day and boarding university-preparatory school, with a curriculum based around the liberal arts.

It is also a member of the International Round Square Organisation and the Canadian Independent Schools Athletic Association.

Baillie House is a girls' residence and named after a prominent family that has attended and supported Appleby for several generations.

[6] The school has a main classroom building, dining hall, arena, five playing fields (one football size), five tennis courts, three squash courts, a gymnasium, a 20m swimming pool, four boarding houses and the Anglican John Bell Chapel, designed in the Westminster style.

The John Bell Chapel features several stained glass windows including 'Iggalaaq' (2004) by Kenojuak Ashevak and Sue Obata.