San Mateo County Small Business Development Center Share: Non Profit San Mateo County Small Business Development Center Visit Website 1900 O'Farrell St #380 San Mateo, CA 94403 (650) 395-9130 Facebook About Map About SM-SBDC is proud to be a part of the greater NorCal SBDC network and work together to support local entrepreneurs and small businesses with the tools and insights to start, and grow their businesses. What's Nearby? Distance: 5 10 15 20 25 50 mi.