Official local service finder

Business licenses & tax certificates

Check the local authority, requirements, applications, renewal, changes and public license searches for your business.

Check or apply for a business license Renew a business license Close or update a business license Look up a business license Register a business for stormwater compliance

Before you start

Start with where your business is located and where it will operate. A county license may apply only to unincorporated areas or specific activities; cities can have their own requirements.
Some county offices provide guidance or referrals and do not issue a general business license. Read the entry before choosing an application.
A business license or tax certificate, an FBN/DBA filing, business entity registration and a professional license serve different purposes. Zoning, health and other activity permits may also apply. Business stormwater registration is a separate local programme where required.
Check the license period, renewal date and rules for changes in ownership or location. A renewal may not cover a move or a new owner. Fees and application steps depend on the license category.

1 guide with reviewed service links · Tuolumne · “City of Sonora”

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County government · Tuolumne

Economic Development — Starting a Business Toolkit

Business licensing requirements and referrals depend on the business activity and its location. Read the specific service scope before applying.

County startup toolkit, unincorporated-area guidance and Sonora referralOfficial instructions

The county toolkit distinguishes Sonora city licensing from its unincorporated-area no-business-license statement. Check activity permits, zoning, state licensing and tax requirements separately.

Source checked October 16, 2026

Tuolumne County official website · Tuolumne County — business licensing discovery (opens in a new tab)

Reviewed business licensing instructions

If you are conducting business within the incorporated City of Sonora, a business license is required. Find more information at here. If you are conducting business in the unincorporated area of Tuolumne County, a business license is not required.

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