California note
Contra Costa County DBA filings are one business-start lane
Contra Costa County fictitious business name filings are handled through the Clerk-Recorder side and sit apart from city licenses, zoning, and other permits.
In Contra Costa County, a DBA filing is one lane in a business start checklist.
The FBN or DBA filing is for the public business name. It can matter for a Concord shop, Richmond food business, Walnut Creek consultant, Antioch contractor, or home business. It helps when the name does not clearly show the owner’s legal name.
The Clerk-Recorder side handles the FBN record. A business license is separate. The right license office can depend on the city or county area. Zoning, health, building, sign, seller’s permit, and state license questions can also be separate.
That split helps because Contra Costa has old downtowns, office areas, waterfront work sites, Delta towns, and county neighborhoods.
Start with the exact name, owner details, main business address, and mailing address. Then check the FBN page and the local license path before using the name widely.
Where to see it
Contra Costa County business compliance and Clerk-Recorder fictitious business name pages.
Official sources
Official pages
Reviewed July 7, 2026
Current rules, forms, fees, deadlines, maps, and office instructions.
Rules, forms, fees, deadlines, and office procedures can change. Check the current page before you file, pay, or rely on a date.
Connected places