If your business office is located in an incorporated city limit of Contra Costa County and you will be doing business in the unincorporated area of the county, click HERE for an online Business License application.
A list of the North American Industry Classification System codes may be found here. (NAICS Codes)
If your business office is located in an unincorporated area of the Contra Costa County, click HERE for an online Business License application. However, you will first need to contact the Department of Conservation and Development at (925) 674-7200 or visit them at 30 Muir Road, Martinez, CA 94553, for zoning and planning requirements before applying for a county business license. Once zoning and planning approval is secured, businesses may submit a business license application to the County Treasurer-Tax Collector.
Not Sure in What Jurisdiction Your Business is Located?
Click Where to go to get a business License to determine which jurisdiction to go to for your business' property address. If you are told to go to a city agency, then your business is located in that city.
Please NOTE: If your business is located in a city limit and you do business in an unincorporated area of the county , you will need to obtain both the city's business license as well as the county's.
Businesses Selling Alcohol or Tobacco
Businesses Selling Alcohol
If your business will be selling alcoholic beverages, you will first need to contact the Department of Conservation and Development, using the same information listed above, before applying for a county business license.
Businesses Selling Tobacco
If your business will be selling tobacco products, you will first need to contact the Health Services Department at (925) 313-6214 before applying for a county business license.