California does not give contractors one filing that covers every agency and city. The Secretary of State's startup process directs businesses to formation, tax, employer, and permit systems. GO-Biz provides permit assistance and CalGOLD routing. CSLB controls contractor classifications and license status.
Business entity or county registration
Corporations and LLCs file formation documents with the California Secretary of State. Sole proprietorships do not, although a sole proprietor using another business name may need a fictitious business name filing through the county. Entity formation gives the company a legal structure; it does not grant contracting authority.
CSLB contractor license
CSLB's applicant guidance says a contractor license is required if a project requires a permit, uses employee labor, or has a combined labor-and-material value of $1,000 or more. The narrow minor-work exemption requires the value to remain below $1,000, no permit, and no employees. A larger project cannot be divided to avoid licensing.
The license classification must fit the work. California uses A General Engineering, B General Building, B-2 Residential Remodeling, defined C specialty classifications, and C-61 limited specialties. A broad-sounding classification is not automatic authority for every single-trade contract.
Local business licenses and project permits
A CSLB license does not replace city and county requirements. Use GO-Biz's Permit and Regulatory Assistance and CalGOLD to identify likely federal, state, and local approvals. Then confirm them directly with each issuing jurisdiction.
Check both the business location and the job location. A contractor may need a local business tax certificate or license where it is based, additional registration where it works, and project-specific building, right-of-way, encroachment, environmental, or trade permits.
Tax permits and accounts
Tax registration depends on the activity. CDTFA says a seller's permit is required when a business is engaged in business in California and sells or leases taxable tangible personal property at retail. Payroll and other tax accounts are separate. Do not use a contractor license number as though it were a tax permit.
Other regulated work
Some services involve another California regulator in addition to or instead of ordinary CSLB classification analysis. The mapped California sources identify separate systems for structural pest control and alarm companies, while the Business and Professions Code separately regulates home inspectors. Define the service before choosing the license.
Permit search checklist
- Confirm the entity or county name registration.
- Match the work to the current CSLB classification text.
- Complete the CSLB application, qualifier, bond, and entity-specific insurance.
- Register the tax accounts that apply to the transactions and workforce.
- Use CalGOLD as a routing tool, then verify each result with the issuing agency.
- Check home-city and job-city business requirements.
- Obtain project permits before work begins.
- Recheck when adding a service, trade, location, or employee.
Frequently asked questions
Can I operate with only an LLC?
No. An LLC is a legal entity. It does not replace a CSLB license, local permit, or tax account.
Does a general building license cover every trade?
No. The B classification has contract and multi-trade rules. Single-trade work may require the appropriate specialty classification.
Can CalGOLD approve my permits?
CalGOLD helps identify requirements and agencies. Confirm and apply through the actual issuing authority.
This page is general operational information, not legal or tax advice. Permit requirements vary by location and scope and can change. Verify every approval with the issuing agency before advertising, bidding, or working.