My name is Abby Costello and I am a Licensed Professional Clinical Counselor, specializing in adolescent therapy. I work with pre-teens, teenagers and young adults to increase their effectiveness so they can feel more in control of their lives. Drawing on my experience in both school and private practice settings in Marin County, I have a strong understanding of how to meet clients where they are and provide personalized support that addresses their unique needs.

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In the summer of 2026, I closed my private practice, where I provided in-person therapy in Corte Madera, California, and telehealth services, to pursue a job opportunity abroad. I am now living in Germany and working as a School Counselor at an international school in Frankfurt. While I am not currently accepting therapy clients, please don't hesitate to reach out if you are looking for referrals or have consultation-related questions. I am happy to help connect you with appropriate resources whenever possible.