California Contractor Licenses: Updated Requirements Guide
California regulates contractor licensing at the state level through the California Contractors State License Board (CSLB). If you plan to contract for jobs of $500 or more in labor and materials, you must hold the correct CSLB classification and pass the state’s Law and Business exam plus your trade exam where applicable.
This guide explains the major contractor classifications for electrical, plumbing, HVAC, general building/engineering, roofing, and key specialties. You’ll find state-specific requirements, exam details, fees, insurance/bond rules, renewal timelines, reciprocity, and official CSLB resources so you can apply confidently and stay compliant.
Local cities and counties in California generally require business tax registration and permits, but do not issue separate trade contractor licenses. Your practice-level construction licensing (including electrician, plumbing, HVAC, general building, roofing, and most specialties) is handled by the CSLB statewide.
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Overview of California Contractor Licensing
The California Contractors State License Board (CSLB) regulates construction contracting statewide. Any person or business that contracts for projects of $500 or more (labor and materials combined) must hold the appropriate CSLB classification. Contractors typically designate a qualifying individual with verifiable journey-level experience to sit for the Law and Business exam and trade exam (when required).
California does not issue separate state-level journeyman or master licenses for electricians, plumbers, HVAC mechanics, or roofers. Instead, trade professionals who perform or supervise work for compensation must qualify for the appropriate contractor classification through the CSLB. Local building departments oversee permits and inspections; cities and counties may require business registration and taxes, but they do not issue separate trade contractor licenses.
Most new applicants document at least 48 months of journey-level experience within the past 10 years, meet minimum age (18+), pass exams, submit fingerprint-based background checks, and provide bonding/insurance documentation. Licenses are issued for two-year terms and renewed biennially. Official requirements, fees, and forms are available on the CSLB website.
Electrician Licenses in California
California regulates electrical contracting through CSLB contractor classifications. The primary classifications used by electrical contractors are listed below.
C-10 Electrical Contractor
Requirements
- Experience: 4 years (at least 48 months) of journey-level electrical experience within the past 10 years.
- Verification: Certification of Work Experience signed by a qualifying certifier (employer, union representative, fellow employee, building inspector).
- Education: College, trade school, or apprenticeship may substitute for up to 3 years of experience.
- Age: 18+
- Exam: CSLB Law and Business exam and C-10 Trade exam (state-administered).
Exam Details
- Name: Law and Business Examination & C-10 Trade Examination
- Format: Multiple choice, closed book
- Questions: Law/Business: 115; C-10 Trade: 100
- Duration: Law/Business: 3.5 hours; C-10 Trade: 2.5 hours
- Passing Score: 72%
- Allowed References: None (closed book)
- Topics (Trade): Planning & Estimating; Rough Wiring & Finish Work; Service, Switchboards & Panelboards; Grounding & Bonding; Safety
- Retake Policy: May reschedule after a fail; $100 per retake
Fees
- Application: $450
- Examination: $100
- Initial License Fee: $200 (sole owner), $350 (all others)
- Renewal: $450 (every 2 years); Late Penalty: $225
Insurance & Bond
- Required: Yes — $15,000 contractor bond; $1 million liability insurance if more than 5 employees; workers’ compensation if you have employees.
Renewal
- Frequency: Biennial (every 2 years)
- CE: No CSLB continuing education requirement (as of 2025)
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D-64 Non-specialized Electrical Contractor (Specialty)
Requirements
- Experience: 4 years (48 months) journey-level experience in the specialty scope within the last 10 years.
- Verification: Certified by someone with firsthand knowledge of your work.
- Education: May substitute for up to 3 years of experience.
- Age: 18+
- Exam: CSLB Law and Business exam and D-64 trade exam.
Exam Details
- Name: Trade Examination (D-64) & Law and Business Exam
- Format: Multiple choice, closed book
- Questions: Varies (approximately 80 for D-class specialties)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Job-specific specialty content; Business & Law overview
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200 (sole owner), $350 (all others)
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation when applicable.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-7 Low Voltage Systems Contractor
Requirements
- Experience: 4 years (48 months) journey-level low voltage systems experience within the last 10 years.
- Verification: Certification of Work Experience by an appropriate authority.
- Education: Education/apprenticeship may substitute for some experience.
- Age: 18+
- Exam: CSLB Law and Business exam and C-7 trade exam.
Exam Details
- Name: C-7 Trade Exam & Law and Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Low voltage systems installation; Business and law
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350 (entity-dependent)
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability insurance required if more than 5 employees; workers’ compensation if employing workers.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-46 Solar Contractor
Requirements
- Experience: 4 years (48 months) journey-level experience in solar/photovoltaic systems within the last 10 years.
- Verification: Certification of Work Experience by an employer or similarly qualified certifier.
- Education: Education/apprenticeship may substitute for some experience.
- Age: 18+
- Exam: CSLB Law and Business exam and C-46 trade exam.
Exam Details
- Name: C-46 Trade Exam & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Solar PV systems; Solar water/heating; Safety and code
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability required if more than 5 employees; workers’ compensation when applicable.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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Plumbing Licenses in California
California plumbing work is regulated through CSLB contractor classifications. There is no separate state journeyman/master plumber license; contractors use the classifications below.
C-36 Plumbing Contractor
Requirements
- Experience: 4 years (48 months) journey-level plumbing experience within the last 10 years.
- Verification: Certification of Work Experience by a qualified certifier.
- Education: Up to 3 years of education/apprenticeship may substitute for experience.
- Age: 18+
- Exam: CSLB Law and Business exam and C-36 trade exam.
Exam Details
- Name: C-36 Trade Exam & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Planning & estimating; Underground & rough piping; Finish work; Safety
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation if you have employees.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-36 Plumbing Contractor (Medical Gas Certification)
Requirements
- Experience: 4 years (48 months) journey-level experience, including medical gas installation work.
- Verification: Supervisor familiar with medical gas jobs must verify experience.
- Education: Certification course in medical gas systems
- Age: 18+
- Exam: C-36 trade exam plus a medical gas endorsement exam (CSLB).
Exam Details
- Name: C-36 Trade plus Medical Gas endorsement exam
- Format: Multiple choice
- Questions: Varies for endorsement
- Duration: Approximately 1 hour (endorsement)
- Passing Score: 72%
- Allowed References: None
- Topics: NFPA 99; Medical gas code; OSHA safety procedures
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation if employing workers.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-55 Water Conditioning Contractor
Requirements
- Experience: 4 years journey-level experience in water treatment within the last 10 years.
- Verification: Certification of Work Experience.
- Education: Up to 3 years of education may substitute for experience.
- Age: 18+
- Exam: CSLB Law/Business and C-55 trade exams.
Exam Details
- Name: C-55 Trade & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Water conditioning; Installation & service; Safety
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability requirements may apply if more than 5 employees; workers’ compensation if applicable.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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HVAC Licenses in California
California HVAC and refrigeration contractors are licensed by the CSLB. There is no separate state HVAC technician license; contractors qualify under the classifications below.
C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
Requirements
- Experience: 4 years (48 months) journey-level HVAC experience within the past 10 years.
- Verification: Certification of Work Experience signed by a qualified certifier.
- Education: Up to 3 years of formal education/apprenticeship may substitute.
- Age: 18+
- Exam: CSLB Law/Business and C-20 trade exams.
Exam Details
- Name: C-20 Trade & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Planning & estimating HVAC; Duct systems; Installation & service; Safety
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation if you hire employees.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-38 Refrigeration Contractor
Requirements
- Experience: 4 years journey-level refrigeration work within the last 10 years.
- Verification: Certification of Work Experience.
- Education: Education/apprenticeship may substitute for up to 3 years.
- Age: 18+
- Exam: CSLB Law/Business and C-38 trade exams.
Exam Details
- Name: C-38 Trade Exam & Law/Business Exam
- Format: Multiple choice
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Commercial refrigeration equipment; Installation and repair; Safety
- Retake Policy: $100 per retake
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation if employing workers.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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General Contractor Licenses in California
General building and engineering contractors are licensed by the CSLB. The classifications below cover broad-scope construction and residential remodeling.
Class B General Building Contractor
Requirements
- Experience: 4 years (48 months) journey-level experience in the building trade within the last 10 years.
- Verification: Certification of Work Experience signed by a qualified certifier.
- Education: Up to 3 years of relevant education/apprenticeship may substitute.
- Age: 18+
- Exam: CSLB Law and Business exam and Class B trade exam.
Exam Details
- Name: Class B Trade Exam & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Trade: 100; Law/Business: 115
- Duration: Trade: 2.5 hours; Law/Business: 3.5 hours
- Passing Score: 72%
- Allowed References: None
- Topics (Trade): Project planning; Framing; Carpentry; Safety
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200 (sole owner), $350 (all others)
- Renewal: $450 (biennial); Late Penalty: $225
Insurance & Bond
- $15,000 contractor bond; $1 million liability if more than 5 employees; workers’ compensation as applicable.
Renewal
- Every 2 years; no CSLB CE requirement (as of 2025)
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Class A General Engineering Contractor
Requirements
- Experience: 4 years journey-level experience in civil engineering or related trade within the last 10 years.
- Verification: Certified by someone with firsthand knowledge of your work.
- Education: Up to 3 years of education/apprenticeship may substitute.
- Age: 18+
- Exam: CSLB Law/Business and Class A trade exams.
Exam Details
- Name: Class A Exam & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 each
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Engineering principles; Earthwork; Infrastructure; Safety
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation as required by law.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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Class B-2 Residential Remodeling Contractor
Requirements
- Experience: 4 years journey-level experience across 3 or more unrelated trades for home improvement within the last 10 years.
- Verification: Certification of Work Experience.
- Education: Education/apprenticeship may substitute for some experience.
- Age: 18+
- Exam: CSLB Law/Business and B-2 trade exams.
Exam Details
- Name: B-2 Trade & Law/Business Exam
- Format: Multiple choice
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Interior/exterior remodeling; Safety; Multi-trade coordination
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability and workers’ compensation requirements apply as above.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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Roofing Licenses in California
Roofing contractors are licensed by the CSLB. There is one primary roofing classification.
C-39 Roofing Contractor
Requirements
- Experience: 4 years journey-level experience in roofing within the last 10 years.
- Verification: Certification of Work Experience.
- Education: Up to 3 years of formal education/apprenticeship may substitute.
- Age: 18+
- Exam: CSLB Law/Business and C-39 trade exams.
Exam Details
- Name: C-39 Trade & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Roofing installation & repair; Safety; Materials
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; $1 million liability if more than 5 employees; workers’ compensation coverage if you have employees.
Renewal
- Every 2 years; no CSLB CE requirement (as of 2025)
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Specialty Trade Licenses in California
Many focused scopes of work are regulated under CSLB specialty classifications. Below are three common specialty categories.
C-16 Fire Protection Contractor
Requirements
- Experience: 4 years related experience in installing fire protection systems.
- Verification: Certified by a supervisor/contractor with firsthand knowledge.
- Education: Education/apprenticeship may substitute for up to 3 years.
- Age: 18+
- Exam: CSLB Law/Business and C-16 trade exams.
Exam Details
- Name: C-16 Trade & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade); 3.5 hours (law/business)
- Passing Score: 72%
- Allowed References: None
- Topics: Sprinkler systems; Fire code; Safety
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability/worker coverage per CSLB rules and employment status.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
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C-13 Fencing Contractor
Requirements
- Experience: 4 years journey-level fence construction experience within the past 10 years.
- Verification: Certification of Work Experience.
- Education: Education/apprenticeship may substitute up to 3 years.
- Age: 18+
- Exam: CSLB Law/Business and C-13 trade exams.
Exam Details
- Name: C-13 Trade & Law/Business Exam
- Format: Multiple choice, closed book
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None
- Topics: Types of fencing; Installation/modification; Safety
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability and workers’ comp per CSLB rules and staffing.
Renewal
- Biennial; no CSLB CE requirement (as of 2025)
Exam Prep: Downloadable PDFs (1,500–2,500 questions) with detailed answer keys and reference locators. Offline, unlimited access. Browse California contractor license practice tests and study material.
C-27 Landscaping Contractor
Requirements
- Experience: 4 years journey-level landscaping experience within the past 10 years.
- Verification: Certification of Work Experience.
- Education: Education/apprenticeship may substitute for some experience.
- Age: 18+
- Exam: CSLB Law/Business and C-27 trade exams.
Exam Details
- Name: C-27 Trade & Law/Business Exam
- Format: Multiple choice
- Questions: Approximately 100 (trade)
- Duration: 2.5 hours (trade)
- Passing Score: 72%
- Allowed References: None allowed
- Topics: Landscape design; Irrigation; Hardscape; Safety
- Retake Policy: $100 per attempt
Fees
- Application: $450; Examination: $100
- Initial License Fee: $200/$350
- Renewal: $450; Late Penalty: $225
Insurance & Bond
- $15,000 bond; liability/workers’ comp requirements apply based on employment.
Renewal
- Every 2 years; no CSLB CE requirement (as of 2025)
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Application Process
- Determine correct license classification (A, B, C or specialty type) for your trade/scope
- Complete Application for Original Contractor License and Certification of Work Experience
- Submit application with $450 fee and any supporting documentation
- Pass CSLB review for qualifications and background check
- Schedule and take Law/Business and Trade exams ($100 exam fee per section)
- Submit bond and proof of insurance
- Pay initial license fee ($200-$350, depending on entity)
- Receive contractor license number
Timeline: 2-6 months from application submission to license issuance (may vary with application volume, incomplete materials, or fingerprint/background delays).
Before you apply, review CSLB’s guidance: Before Applying for the Examination. You can submit the Original Application online: CSLB Original Application. All applicants complete Live Scan fingerprinting for background checks: CSLB Fingerprinting.
Reciprocity
California has reciprocity with Arizona, Louisiana, Nevada, and Utah. Reciprocity may allow a waiver of the trade exam for matching classifications, but you must still pass the California Law and Business exam.
Requirements: Be in good standing in the same classification for at least 5 years in the reciprocal state and submit CSLB reciprocity verification. Limitations apply and not all specialties are covered. See CSLB guidance: Reciprocity Application Information.
Frequently Asked Questions
How long does it take to get a contractor license in California?
Typical processing time is 2–6 months from application submission to license issuance. Timelines vary with application volume, completeness of documentation, and fingerprint/background processing.
Can I transfer my license from another state to California?
California participates in reciprocity with Arizona, Louisiana, Nevada, and Utah. If you’ve held the same classification in good standing for 5 years, CSLB may waive the trade exam. You must pass the California Law and Business exam and submit reciprocity verification.
What happens if I fail a CSLB exam?
You can reschedule after a failure. CSLB charges an additional $100 per retake for each exam component.
Do I need insurance or a bond?
Yes. CSLB requires a $15,000 contractor bond. Liability insurance thresholds can apply (for example, $1 million if you have more than 5 employees). Workers’ compensation is required if you employ workers.
How often do I renew my license?
CSLB licenses renew every 2 years. As of 2025, CSLB does not require continuing education for renewal.
Are there local (city/county) contractor licenses in California?
Practice-level contractor licensing is handled by the CSLB statewide. Cities and counties generally require business tax registration and building permits but do not issue separate trade contractor licenses. Always confirm local business registration requirements with your city/county.
Where can I find practice tests for California exams?
We offer comprehensive PDF practice materials for California contractor exams. Each set typically includes 1,500–2,500 questions with complete answer keys and reference locators to exact code sections. Study offline at your own pace with no usage limits. Browse California contractor practice tests.
What fees should I expect?
Typical costs include a $450 application fee, $100 per exam component, and an initial license fee of $200 (sole owner) or $350 (all others). Renewals are $450 every two years, with a $225 late penalty if applicable. See CSLB’s current Fee Schedule.
Official Sources & References
Official Sources:
-
CSLB Licensing Classifications
https://www.cslb.ca.gov/about_us/library/licensing_classifications/
Official Board Site | Accessed: 2025-11-01 -
CSLB: Before Applying for the Examination
https://www.cslb.ca.gov/contractors/applicants/contractors_license/exam_application/before_applying_for_license.aspx
Official Board Site | Accessed: 2025-11-01 -
CSLB Main Board Homepage
https://www.cslb.ca.gov
Official Board Site | Accessed: 2025-11-01 -
CSLB Reciprocity Information
https://www.cslb.ca.gov/About_Us/Library/Guides_And_Publications/Reciprocal_Applic_Information.pdf
Official Board Site | Accessed: 2025-11-01 -
CSLB Application for Original Contractor License
https://www.cslb.ca.gov/contractors/applicants/contractors_license/exam_application/original_application.aspx
Official Board Site | Accessed: 2025-11-01 -
CSLB Insurance Requirements
https://www.cslb.ca.gov/contractors/applicants/Contractors_Bond_Bonding_Requirements.aspx
Official Board Site | Accessed: 2025-11-01 -
CSLB Fee Schedule
https://www.cslb.ca.gov/About_Us/Library/Forms_And_Applications/Fee_Schedule.pdf
Official Board Site | Accessed: 2025-11-01 -
CSLB Fingerprinting/Background Information
https://www.cslb.ca.gov/contractors/applicants/fingerprinting.aspx
Official Board Site | Accessed: 2025-11-01
⚠️ Important Disclaimer
Information Currency: This guide reflects licensing information as available in 2025. Requirements can change at any time. Always confirm the latest rules and fees with CSLB before applying.
Official Source: California Contractors State License Board (CSLB)
- Website: https://www.cslb.ca.gov
- Phone: (800) 321-2752
No Legal Advice: This guide offers general information, not legal counsel. Consult CSLB or a qualified professional for advice specific to your circumstances.
Local Requirements: While CSLB regulates state contractor licensing, cities and counties may require business registration and permits. Always verify local administrative requirements where you plan to work.