[1] The school is centred on a mansion house set in 72 acres (290,000 m2) of parkland, at Bridge of Earn, 3 miles (4.8 km) south of Perth.

[2] Kilgraston had music and arts departments, hockey, tennis and swimming academies, and was Scotland's only school with an on-site equestrian centre.

John Grant, the eldest son of Patrick Grant of Glenlochy, in Strath Spey, Inverness-shire, and whose principal wealth was made in Jamaica, was for several years a member of the Assembly there, becoming an assistant Judge of Jamaica's Supreme Court, and eventually succeeded Thomas French as Chief Justice of that island in January 1783, which office he held until 1790.

Capital investments have included the opening of a 25m indoor swimming pool complex and upgrades to the equestrian centre (Kilgraston is the only school in Scotland with equestrian facilities on campus) including a 60m x 40m floodlit arena and an international sized all-weather floodlit hockey pitch.

Other developments have been a new theatre with retractable seating for 150, a bistro style dining room, sports pavilion as well as an upgrade of the residential facilities.

[8] 6 days after the closure announcement, Kilgraston was reported to be in final talks with a long term investor, Achieve Education Limited.

[9] In August 2024, it was announced that Kilgraston would close immediately due to a sale falling through with Achieve Education Limited.

The girls resided in three boarding houses: Butterstone and Austin (Junior Years),[12] Mater (Senior School)[13] and Barat or Swinton (Sixth Form).