CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in San Francisco County zip codes than in any other category.
The following table shows how many real estate, rental and leasing businesses with between one and four employees were in San Francisco County zip codes during the period from 2012 to 2016.
Real estate, rental and leasing businesses with between one and four employees in San Francisco County (2012-2016)
Year
Total businesses
2012
1242
2013
1306
2014
1349
2015
1411
2016
1418