The 4.5-acre (1.8 ha) campus overlooks the Pasadena Rose Bowl and the Arroyo Seco.

After eight years, the school outgrew the original Altadena campus, and with the help of 40 parents, a down payment was raised to purchase the present Armada Drive property.

The site at 1005 Armada Drive opened to students on September 20, 1958, with two buildings and an athletic field.

Thomas A. Chandler died in 1996, but his wife Catherine remains active in the school community.

[2] Chandler had an enrollment of 450 students, its largest ever, to its new South Campus in the fall of 2011, featuring a Middle School classroom building, a renovated gym, and outdoor sports court.