At the main San Anselmo Campus the four cottages of our Sunny Hills Adolescent Treatment (Level 12) program serve emotionally, behaviorally, and mentally disturbed boys and girls ranging in age from 12 to 18. Many Sunny Hills clients cannot function properly in a community setting or have shuffled between residential treatments due to their extreme behavioral disorders. Housed in cottages of ten, 20 boys and 20 girls undergo intensive milieu-based treatment. Each milieu team comprises a group of mental health professionals including a Master's level social worker, a nurse, a teacher, a dietitian and a consulting psychiatrist.

Clients attend the special education school on the campus grounds and participate in an individually designed Day Treatment program of individual, group, family and recreation therapy specifically aimed at providing the tools and life skills for clients to function as normal children and teens.

The program focuses on helping clients develop the self-understanding, impulse control and learning tools necessary for successful participation in their community, their school, their peer group, and their family. A level system enhances clients' ability to assess their own strengths and weaknesses and motivates them towards assuming more responsibility and autonomy in relating to the outside community.

The Sunny Hills program strives to reunite clients with their families or caregivers. If reunification is not possible before clients reach age 18, they receive support in finding appropriate housing and employment to ease transition to life in the community.