Oak Hill School was founded in 2000 by a small group of parents with children on the autism spectrum. After forming a Board of Directors, advised by special educator and founding clinician Dr. Barbara Kalmanson and several community educators, they purchased a school site in a wooded former estate behind Marin City in Sausalito. School began with five students and steadily grew after certification as a non-public school. Oak Hill is licensed by the State of California to accept students with school district funding as well as private tuition.

With a growing student body, Oak Hill moved in 2008 to its current home on the Sunny Hills Services campus in San Anselmo. Now with 36 students and growing, Oak Hill benefits from extensive campus opportunities, including 7 classrooms, speech and psychotherapy rooms, an occupational therapy studio, offices, an organic vegetable garden, a chicken run, gymnasium, natural and synthetic turf athletic fields and an outdoor swimming pool.