Mill Hill International School Thailand

The newest and most talked-about addition to Chiang Mai's school scene (opened September 2025). Mill Hill is a prestigious London independent school founded in 1807 — in British terms a "public school," which confusingly means elite private. This is its first campus outside the UK, built in partnership with Ornsirin (Chiang Mai's largest property developer) as part of the Ornsirin City Park development on the Third Ring Road. Currently Nursery through Year 6, with phased expansion to Year 13 planned by 2029 — worth knowing upfront if you have teenagers now. Fees sit at the premium end of the Chiang Mai market.