CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in Napa County zip codes than in any other category.
The following table shows how many construction businesses with between one and four employees were in Napa County zip codes during the period from 2012 to 2016.
Construction businesses with between one and four employees in Napa County (2012-2016)
Year
Total businesses
2012
287
2013
277
2014
272
2015
286
2016
298