Cornerstones of Maine

Cornerstones of Maine is a mental health service in Biddeford, Maine, offering residential treatment, transitional living, and step-down programs for young adults aged 18 to 30. The organization specializes in supporting individuals navigating mental health conditions, neurodivergence, failure to launch, and the transition to independent adulthood. With a clinician-owned model rooted in evidence-based practices, Cornerstones integrates mental health care, daily structure, community living, and practical life skills into a cohesive program. Services are designed to meet young adults where they are and help them progress toward long-term independence. The business serves clients across Maine and holds a 3.70 rating based on 40 reviews.

Founded in 2015 by clinical psychologists Dr. Joshua Altschule and Dr. Jacob Gelles, Cornerstones was developed in response to the growing need for specialized care for young adults struggling with anxiety, depression, ADHD, and executive functioning challenges. The program’s distinctive approach combines milieu therapy, executive functioning coaching, and real-world experiential learning within a therapeutic community. Residents engage in individual therapy, psychiatry, group sessions, and daily living tasks, all supported by a clinician-led team. The continuum of care includes short-term residential treatment, transitional living in collaborative apartments, step-down housing for greater autonomy, and aftercare support to ensure sustained progress.

Located at 257 South St in Biddeford, the facility sits about a quarter mile from Thacher Brook, a nearby creek and river, and is within a short walk of Rotary Park and Memorial Park (Mayfield). It lies just under a mile from the Saco River Reservoir, with Cole Brook also nearby, placing the center within a green, accessible urban corridor.

Cornerstones of Maine stands out for its comprehensive, clinically grounded approach and its strong reputation for delivering consistent, well-documented care. The organization is recognized for its deep commitment to long-term outcomes, with alumni receiving continued support post-discharge. Its team of licensed clinicians and life skills coaches ensures that treatment is both clinically rigorous and practically oriented, making it a trusted resource in the region.

In Biddeford, Cornerstones of Maine is a vital presence in the mental health landscape, offering a rare blend of clinical depth and real-world preparation for young adults stepping into independence.