Mainstream HouseWrite a Review631-574-8948Be the first to review!117 Duryea St, Riverhead, NY 11901Hi there!Be the first to review!5First-class4Better than most3About what I expected2Not the worst...1DisappointingClick to RateMore Business InfoHoursDo you know the hours for this business?Other Linkhttp://mainstreamhouse.netCategoryDrug Abuse & Addiction Centers Suggest an Edit