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Compulsive hoarding is characterized by the acquisition of, and failure to discard, a large number of possessions and clutter that prevents the use of living spaces as intended. Current successful treatments such as individual and group cognitive-behavioral therapy are lengthy and costly, requiring a time commitment ranging from four to twelve months, trained clinicians to administer treatment, and multiple home visits. Nonprofessional interventions may provide a cost-effective pre-treatment, adjunct, or alternative for individuals who want to work on hoarding problems but are unable or unwilling to engage in treatment. The purpose of the present study was to investigate the effectiveness of an innovative program consisting of a 13-session non-professionally facilitated biblio-based, action-oriented support group using Tolin, Frost, and Steketee’s (2007b) self-help book. In study 1, seventeen self-identified hoarding participants experienced significant decreases in clutter, difficulty discarding, and excessive acquisition from pre-treatment to post-treatment, with reductions evident at mid-treatment. Study 2 replicated the findings of study 1 using interview and observational measures taken in participants’ homes. These findings suggest that a facilitated biblio-based group may be a promising intervention for hoarding disorder.