According to our records, this business is located at 909 Clark St. in Santa Rosa (in Sonoma County), California 95404, the location GPS coordinates are: 38.437568 (latitude), -122.705827 (longitude). R A Nielsen & Sons is categorized under Bank Building Construction (SIC code 1542). Current estimates show that the unit has a sales volume of $1,752,000 and staff of approximately 4 people. You can contact the company by phone at (707) 542-2298.