Contra Costa County is broadly divided into three sub-areas: West County, including of the cities of El Cerrito, Richmond, San Pablo, Pinole, and Hercules, as well as the unincorporated communities of Kensington, El Sobrante, North Richmond, Rodeo, Crockett, and Port Costa.
Limited partnerships, corporations, and limited liability companies (LLCs) are all legally required to register within California. Only sole proprietorships are exempt.
The County Ordinance requires that you obtain a license for conducting business within the unincorporated areas, - even if your business is located outside our limits or you have a business license from another city.
California doesn't necessarily require all businesses (of any structure) to obtain a license. While the state doesn't issue or require a business operating license, it regulates and requires licenses or permits for some business activities.
Under Code of Civil Procedure § 437c(c), a motion for summary judgment "shall be granted if all the papers submitted show that there is no triable issue as to any material fact and that the moving party is entitled to judgment as a matter of law." (Code Civ.
Contra Costa County sales tax details The minimum combined 2025 sales tax rate for Contra Costa County, California is 8.75%. This is the total of state, county, and city sales tax rates. The California sales tax rate is currently 6.0%. The Contra Costa County sales tax rate is 0.25%.
The County Ordinance requires that you obtain a license for conducting business within the unincorporated areas, - even if your business is located outside our limits or you have a business license from another city.
A seller's permit is applicable to individuals (sole proprietorship) as well as corporations and limited liability companies. Every new business in the state will need to apply for a general online business license in California, which is issued by cities or counties.
Obtain your business license with the City. All businesses must have a business license, including businesses operated out of your home. For more information, call 925-372-3568 and visit the City of Martinez website HERE.