According to our records, this business is located at 2150 N 107th St # 200 in Seattle (in King County), Washington 98133, the location GPS coordinates are: 40.0203721 (latitude), -105.1028497 (longitude). ADD Learning & Developmental is categorized under Mental Health Services (SIC code 8063). Current estimates show that the unit has a sales volume of $972,000 and staff of approximately 12 people. You can contact the company by phone at (206) 363-7400.