T 4 Company
Services
Services estimated based on license classification. Claimed businesses can customize their service list.
About the ASB — ASB License
A ASB (ASB) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a ASB contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the B — General Building License
A General Building (Class B) license is one of the most common contractor licenses in California. It authorizes the holder to construct, alter, or repair buildings and structures. This includes residential homes, commercial buildings, and industrial facilities. A Class B contractor can use two or more unrelated building trades on a single project, making them ideal for comprehensive construction and renovation work. They often serve as the primary contractor who coordinates subcontractors for specialized trades. When hiring a General Building contractor, homeowners should verify the license is active and in CLEAR status, confirm adequate insurance coverage, and always get a detailed written contract before work begins. General Building contractors must maintain a $25,000 contractor bond and carry workers' compensation insurance if they have employees.
About the C-5 — Framing & Rough Carpentry License
The C-5 Framing and Rough Carpentry license covers the structural skeleton of buildings — the framework that everything else is built upon. C-5 contractors install wood and metal framing, roof trusses, sheathing, subflooring, and other structural components. This is one of the most physically demanding and technically important trades in construction, as the quality of framing directly affects a building's structural integrity and safety. In earthquake-prone California, proper framing techniques and seismic considerations are especially critical. C-5 contractors must understand load calculations, building codes, and engineering specifications. When hiring a framing contractor, look for experience with your project type, verify they follow current seismic codes, and ensure they coordinate well with other trades that will follow their work.
About the C21 — C21 License
A C21 (C21) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a C21 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the C22 — C22 License
A C22 (C22) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a C22 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
💡 Tips for Hiring a ASB Contractor
- Always verify the contractor license is active on the CSLB website
- Get at least three written estimates before making a decision
- Never pay more than 10% or $1,000 down (whichever is less) per California law
- Get a detailed written contract specifying scope, timeline, and payment terms
- Verify the contractor carries general liability and workers compensation insurance
✅ Verify This License
Always verify contractor licensing directly with the Contractors State License Board (CSLB) before hiring. You can look up license #984213 to confirm it is active and check for any complaints or disciplinary actions.
Check on CSLB.ca.gov →🏢 Are you T 4 Company?
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Claim This Page →Frequently Asked Questions
Do I need a licensed ASB contractor in California?
Yes. California law requires a licensed contractor for any asb work valued at $500 or more. Licensed contractors must pass exams, maintain bonding, and carry insurance. Hiring unlicensed contractors puts you at risk.
What does a ASB license cover?
A ASB (ASB) license authorizes the contractor to perform specialized asb work in California. The specific scope is defined by the CSLB. Verify the license covers the work you need before hiring.
What is the difference between a Class A and Class B contractor license?
A Class A (General Engineering) license covers infrastructure projects like roads, bridges, and utilities. A Class B (General Building) license covers building construction, remodeling, and structural work on homes and commercial properties.
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