Keystone Hall, formerly known as the Greater Nashua Council on Alcoholism, is a non-profit organization whose mission is to provide comprehensive substance use treatment and recovery services to individuals and families in a supportive environment while providing a strategic framework for substance use prevention in New Hampshire.

Keystone Hall is New Hampshire’s premier substance use disorder treatment, prevention, and recovery support services center, offering both inpatient and outpatient services to men, women, families, and adolescents. Located in new state-of-the-art facility in Nashua, NH, Keystone Hall serves those with and without insurance, with a focus on serving those least able to afford treatment on their own. No one is turned away, regardless of ability to pay.

All treatment and services are gender-specific, trauma informed, and “open programs” with individuals able to start treatment as soon as space is available. All treatment is evidence-based.  Services are offered in both English and Spanish.


Keystone Hall was founded in 1983 by Paul Lacasse, a New Hampshire native and former marine who dedicated most of his life to social services. Mr. Lacasse, a recovering alcoholic, made it his personal mission to help others reach and maintain sobriety, while reducing the stigma associated with addiction.hopeless1

In 1986, Keystone Hall’s first program, a 6-bed, 24-hour non-medical crisis detoxification center opened in an old manufacturing building in downtown Nashua.  Four years later the agency moved to a larger space, having quickly outgrown its initial home. Keystone began to expand programs to meet needs within the community,  and became the first organization in the state to offer both outpatient and residential programs to those most in need of addiction treatment.  A transitional living program was added in 1990 to address the ongoing recovery efforts and housing needs of homeless individuals who completed acute, residential treatment but required supports to fully integrate back into the community

In 2003, Keystone Hall affiliated with Harbor Homes and joined what has become the Partnership for Successful Living. Since that time, the agency has quadrupled its budget and significantly increased the number of services provided.  Today it is the largest contractor of the New Hampshire Bureau of Drug and Alcohol Services in the state, providing evidence-based treatment and prevention services to over 700 individuals and families each year.  Since its inception, Keystone Hall has provided more than 13,000 individuals with the life-saving gift of treatment.

TLCgraduateKeystone’s 2012 Expansion

After years of searching, Keystone Hall purchased a 26,000 square foot 2-story commercial building , located at 615 Amherst Street (101A) in Nashua. The building is ideally situated along a public bus line, is less than 5 miles from downtown Nashua,  and just 3 miles from the Everett Turnpike/Route 3.  The building allowed Keystone Hall to nearly double its residential capacity and expand all of its programs.

About Us

  • Open 24 hours a day, 365 days a year
  • On-site professional, licensed clinical staff that understand the disease of addiction and offer the latest evidence-based, psychoeducational approach to treatment and recovery
  • Services are gender specific and culturally responsive
  • Dual-diagnosis enhanced treatment options provided on-site by licensed mental health professionals
  • Equally serving those with the ability to pay for services, as well as those who cannot.  Private insurance accepted.
  • Onsite health care clinic with psychiatric care offered
  • All services offered in English and Spanish

Services and Programs

Keystone Hall offers a continuum of recovery that is comprehensive and holistic, and fully integrated with medical and mental health care. New residential and outpatient services are available as a result of the recent expansion.  A full-service primary health care clinic, Harbor Care Health and Wellness Center,  is offered on-site. The agency is able to meet the treatment and recovery needs of men, women, families and adolescents.  The agency offers:

  • High Intensity (Short-term) Residential Treatment
  • Low Intensity (Long-term) Residential Treatment for Individuals with Co-occurring Disorders
  • Cynthia Day Family Center
  • Intensive Outpatient services

In addition to the direct services provided by Keystone Hall, clients have access to a full continuum of care through the Partnership for Successful Living member-agencies, a collaboration of six affiliated not-for-profit organizations that provide New Hampshire’s most vulnerable community members with access to affordable and supportive housing, health care, behavioral health care, education, employment, and supportive services. Keystone Hall is able to better coordinate and  deliver a comprehensive array of interventions designed to empower low-income  individuals and families, and ultimately build a stronger community. Outcomes are enhanced through this Partnership model.

To learn more about how you or your business can be an agent of change in our communities, visit our Donate page or Contact Us for more information.

If you or a loved one is struggling, Keystone Hall can help. Visit our Get Help page or email us for more information.

To learn more about Keystone Hall, its leadership and staff, the services provided, the outcomes generated, and its role within the Partnership for Successful Living, visit our Discover page.

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Keystone Hall
615 Amherst Street, Nashua, NH 03063

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