Cities / Chiang Mai / Mill Hill International School Chiang Mai
Mill Hill International School Chiang Mai
Mill Hill's first overseas school. Opened September 2025 in Doi Saket, operated locally by Ornsirin under partnership with the UK Mill Hill Education Group.
In brief
Mill Hill's first overseas school. Opened September 2025 in Doi Saket, operated locally by Ornsirin under partnership with the UK Mill Hill Education Group.
Currently Nursery to Year 6 for the 2025 to 2026 launch year, building toward a full 3 to 18 school by 2029. Around 150 students in the opening intake. British curriculum starting with EYFS, then Prep, with Senior added as cohorts progress. Founding head Kate Simon comes from Grimsdell, Mill Hill's pre-prep in London. Director on the ground is Dr Yuthachai Damrongmanee.
The campus sits in Ornsirin City Park on the third ring road, with around a billion baht of investment behind it. Phase one facilities include a library and pre-prep pool, with a 500-seat auditorium, science labs, and full sports grounds in the build plan. The school has the brand, the funding, and a credible founding head, but no track record yet. Families joining now are buying a vision, not a school with results.
Fees
Annual fees
| Year level | Age | Fee |
|---|---|---|
| Nursery | 3 | THB 447,300 |
| Reception | 4 | THB 447,300 |
| Year 1 | 5 | THB 481,950 |
| Year 2 | 6 | THB 481,950 |
| Year 3 | 7 | THB 516,600 |
| Year 4 | 8 | THB 516,600 |
| Year 5 | 9 | THB 551,250 |
| Year 6 | 10 | THB 551,250 |
| Year 7 | 11 | THB 595,350 |
| Year 8 | 12 | THB 595,350 |
| Year 9 | 13 | THB 642,600 |
One-time fees
| Item | Age | Fee |
|---|---|---|
| Registration Fee (non-refundable) | THB 5,000 | |
| Deposit Fee (security deposit) | THB 50,000 | |
| Placement Fee (on offer/acceptance) | THB 150,000 |
Leadership
Mrs Kate Simon
Mrs. Kate Simon is the founding Head of Mill Hill International School Thailand. With a background in education at Mill Hill, she is dedicated to implementing 'The Grimsdell Way' and fostering a positive learning environment for students. Her vision includes a fully immersive, creative curriculum that supports linguistic development and embraces cultural diversity.