Although cognitive-behavioral therapy (CBT) appears to be a promising treatment approach for hoarding disorder, treatment to date has been quite labor intensive. The goal of this study, therefore, was to assess the potential effectiveness of group CBT for hoarding, without home visits by the clinician. Forty-five individuals with hoarding disorder enrolled in either a 16 or 20 session program of group CBT; 30 (67%) completed treatment. Using mixed-effects models to account for missing data, we report data from 35 (78%) participants who provided enough data for analysis. Participants demonstrated significant improvements in hoarding symptoms, as well as symptoms of depression and anxiety, and quality of life. Improvements in hoarding symptoms were comparable to two published clinical trials on individual CBT for hoarding disorder. Results of this study suggest that group CBT for hoarding, without home discarding sessions by the clinician, may be an effective treatment option with the potential advantage of increasing treatment access by reducing clinician burden and cost of treatment.