Purpose There are a lack of recourses for substance abuse (SA) treatment for forensic clients with intellectual disabilities (ID). Many complexities arise when treating this population, calling for the creation of comprehensive resources which not only address the SA, but also account for the risk and offending issues. The purpose of this paper is to detail a pilot programme which aims to provide treatment for forensic ID clients with substance abuse issues as well as a significant risk of reoffending. Design/methodology/approach Six participants completed a 27-week SA treatment programme (the Alcohol and Substance Abuse Programme-Intellectual Disability) which incorporated the use of dialectical behavioural therapy (DBT) and the Good Lives Model concepts. Pre- and post-measures aimed to assess readiness for change and confidence in ability to stay clean and sober. Findings Preliminary findings showed a marked improvement in confidence of the participants’ ability to stay clean and sober in risk-related situations as well as an increase in overall readiness for change. Originality/value This research paper addresses a gap in the current forensic ID research and clinical treatment options pertaining to SA, by focussing on supporting forensic ID clients in their recovery journey from SA. Being at the forefront of SA treatment for forensic ID, further research in this domain should attempt to consolidate the findings of this programme.