A general b contractor license authorizes building construction work -- the core classification that most general contractors hold. It covers framing, concrete, masonry, and the coordination of specialty trades on commercial and residential structures. Unlike the A (engineering) classification, the B license focuses on habitable and non-habitable building structures.

For GCs managing subcontractors, understanding what the B license does and does not authorize prevents classification errors that trigger fines and project delays. This checklist walks you through every verification step.

B License Classification: What It Covers

The B license authorizes work on structures designed for human occupancy or use. This includes offices, retail spaces, warehouses, residences, schools, and healthcare facilities.

Work Type	Covered by B License	Notes
Wood framing	Yes	Residential and commercial
Concrete foundations	Yes	For buildings, not infrastructure
Steel erection	Yes	Building structural steel
Masonry construction	Yes	Walls, facades, structural masonry
General remodeling	Yes	Interior and exterior
Roofing	Limited	Some states require C-39
Electrical	No	Requires C-10 or equivalent
Plumbing	No	Requires C-36 or equivalent
HVAC	No	Requires C-20 or equivalent
Road construction	No	Requires A license
Underground utilities	No	Requires A license

Pre-Qualification Checklist for B-Licensed Subcontractors

Use this checklist when onboarding any subcontractor who claims a B license.

State-by-State B License Requirements

State	B License Name	Experience Required	Exam Required	Bond
California	B - General Building	4 years	Yes (trade + law)	$25,000
Arizona	KB-1 General Commercial	4 years	Yes	Varies
Nevada	B - General Building	4 years	Yes	$1,000-$500,000
Florida	CGC (Certified GC)	4 years or degree + 1 year	Yes	None
North Carolina	General Contractor	4 years	Yes	None
Oregon	General Contractor	No minimum	No	$75,000
Georgia	General Contractor	4 years	Yes	None
Utah	B-100 General Building	2 years	Yes	None

Common B License Verification Errors

Error 1: Accepting a B license for specialty trade work. A B-licensed contractor can frame a building but cannot wire it. If your sub holds only a B license, they cannot perform electrical, plumbing, or HVAC work -- even on a building they framed. Each specialty trade requires its own license classification.

Error 2: Not distinguishing between residential and commercial B licenses. Some states issue separate residential and commercial building licenses. A residential B license may not authorize work on commercial projects above certain dollar thresholds or building sizes.

Error 3: Assuming the B license covers all building-related work. In some states, roofing, painting, and demolition require separate specialty classifications even though they relate to building construction. Check your state's classification rules.

How B License Limits Affect Subcontract Values

Several states cap the dollar value of contracts a B-licensed contractor can take based on their financial qualifications.

State	License Tier	Dollar Limit
Nevada	B (lowest tier)	$100,000
Nevada	B (mid tier)	$1,000,000
Nevada	B (unlimited)	No limit
North Carolina	Limited	$500,000
North Carolina	Intermediate	$1,000,000
North Carolina	Unlimited	No limit
Utah	B-100	Varies by qualifier

Assign a subcontract that exceeds the sub's license dollar limit and the contract may be unenforceable. Verify the limit before executing the agreement.

FAQs

What does a general B contractor license allow you to build? A B license authorizes construction of buildings and structures -- commercial, residential, industrial, and institutional. This includes new construction, remodeling, and additions. It does not authorize engineering work (roads, bridges, pipelines) or specialty trade work (electrical, plumbing, HVAC) that requires separate classifications.

Can a B-licensed contractor pull permits for specialty work? In most states, no. Specialty trade permits (electrical, plumbing, mechanical) must be pulled by contractors holding the appropriate specialty license. A B-licensed GC coordinates these trades but does not perform the permitted work unless they also hold the specialty classification.

How long does it take to renew a B contractor license? Most states process renewals in 2-4 weeks if all requirements are met (insurance current, bond active, fees paid, CE complete). Late renewals may require additional documentation or reinstatement fees. Never let a renewal lapse -- work performed during a lapse is considered unlicensed.

Is a B license required in every state? No. Some states (Texas, New York, Vermont, and a few others) do not have state-level contractor licensing. In those states, licensing happens at the city or county level. Check both state and local requirements for every project jurisdiction.

What happens if a B-licensed sub works outside their classification? The licensing board can fine the sub, suspend their license, or both. The GC who assigned the out-of-scope work may also face penalties. The work itself may need to be removed and redone by a properly classified contractor -- at the GC's expense.

Can I verify a sub's B license online? Yes. Every state with a licensing requirement offers free online verification through their contractor licensing board website. Enter the license number or contractor name to see status, classification, expiration date, and disciplinary history. Verification takes 2-5 minutes.

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