A Class B contractor can construct, remodel, and repair buildings designed to shelter people or property — houses, apartments, offices, retail stores, warehouses — as long as the project involves at least two unrelated trades beyond framing and carpentry, and the contract stays within the dollar limits your state sets for the class. The license is built around general building work that requires coordinating multiple trades under one contract, which is why single-trade jobs and certain high-risk specialties fall outside its scope.
Buildings and Structural Work You Can Take On
The defining scope of a Class B license is the construction or remodeling of structures that support, shelter, and enclose people or property. That covers single-family homes, apartment complexes, retail stores, offices, and warehouses. Framing and carpentry sit at the core of the classification because they form the structural skeleton of any building, and most states let a Class B contractor take a stand-alone framing or carpentry contract without a specialty license.
Beyond framing, you are authorized to oversee and perform structural work including roof installation, wall construction, and flooring systems, all of which must meet local building code requirements for load-bearing capacity and safety. The work qualifies as a Class B project because it requires coordinating multiple trades (framing, concrete, roofing, and so on) under a single contract rather than focusing on one narrow specialty.
The Two-Trade Rule
Most licensing laws require that a Class B project involve at least two unrelated trades beyond framing and carpentry before you can take the job. A contract to paint a building’s interior or retile a bathroom involves only one specialty trade, and a Class B license generally does not authorize that work. The restriction exists to keep general contractors from competing for single-trade jobs that belong to licensed specialty contractors. If you also hold the matching specialty license, you can take the single-trade contract under that separate license.
Specialty Work Inside a Larger Project
You can perform some specialty work — masonry, drywall, insulation, and the like — when it is part of a larger multi-trade project. The task has to be incidental to the broader contract, not the primary purpose of it. Building an addition that involves framing, electrical, plumbing, drywall, and painting? You or your employees can handle the drywall as part of the overall project. A stand-alone drywall contract is a different matter, and a Class B license by itself will not cover it.
Several states formalize this through an “incidental and supplemental” rule: work in a specialty classification is allowed when it is essential to accomplish the broader project you are licensed for. You can either use your own employees for the incidental work or hire a licensed subcontractor. The rule stops general contractors from cherry-picking profitable specialty jobs while still letting them manage complete building projects efficiently.
Trades That Require a Separate License
Certain high-risk trades are carved out of the Class B scope entirely, no matter how large the surrounding project is. Plumbing, electrical work, and HVAC installation almost always require workers who hold separate specialty licenses and have passed trade-specific exams at the journeyman or master level. A Class B contractor who self-performs electrical work without the proper specialty license risks criminal charges, even when the electrical scope is a small piece of a large remodeling contract.
The reason is safety. Faulty wiring causes fires, improper plumbing creates flooding and contamination risks, and defective HVAC systems can lead to gas leaks or carbon monoxide exposure. In practice, most Class B contractors subcontract electrical, plumbing, and HVAC work to licensed specialists and build those costs into the overall project bid.
Dollar Limits Per Contract and Per Year
The monetary ceiling is what most clearly separates a Class B license from a Class A. States set both a per-contract limit and an annual aggregate limit. One common structure puts the Class B per-contract threshold at roughly $30,000 to $150,000, with an annual volume cap below $1 million. Projects above those thresholds require a Class A license. Projects below the lower threshold may fall under a Class C license or, in some states, may not require a license at all. The exact numbers vary significantly: some jurisdictions set the Class B single-contract ceiling as high as $20 million for commercial work, while others cap it well below $500,000. Check your own state’s figures before signing.
These caps are not guidance. Taking a project that exceeds your license class is treated the same as working without a license in most states. If your business is growing and your projects are approaching the Class B ceiling, upgrade to a Class A before accepting the next contract to avoid legal exposure and the risk of losing your right to collect payment.
Running the Job as Prime Contractor
A Class B contractor typically acts as the prime contractor, holding the main contract with the property owner and coordinating all subcontractors on the job. That role involves scheduling, quality control, code compliance, and making sure each trade’s work integrates with the others. You are the single point of accountability for the owner and for government inspectors.
Lien Waivers and Payment Tracking
When you manage subcontractors, the owner faces a risk: a subcontractor who does not get paid by the general contractor can file a mechanic’s lien against the property, even though the owner already paid you. Lien waivers protect against this. Before each progress payment, the owner can require conditional lien waivers from every subcontractor and supplier. Once the payment clears, those conditional waivers convert to unconditional ones, confirming the subcontractors have been paid and cannot place a lien for that portion of the work.
The Qualifying Individual
When a corporation or LLC holds the license, one person inside the company must serve as the qualifying individual, sometimes called a responsible managing officer or responsible managing employee. That person needs the required experience and exam credentials, and must be actively involved in supervising construction work: checking jobs for proper workmanship, making technical decisions, and ensuring compliance with building, safety, and lien laws. If the qualifying individual leaves the company, the license is typically suspended until a replacement qualifies.
Insurance, Bonding, and Permits
Holding the license comes with financial obligations you have to carry before you can legally operate.
- General liability insurance covers property damage and bodily injury caused by your work. Minimum required coverage varies by state but commonly starts at $1 million per occurrence for mid-range general contractors.
- Workers’ compensation insurance is required in nearly every state if you have employees. Some states allow sole proprietors or independent contractors with no employees to file for an exemption, but the exemption disappears once you hire workers.
- A surety bond protects the property owner, not you. If you fail to complete the work or violate the contract, the owner can file a claim against the bond. Amounts vary by state and license class, often ranging from $15,000 to $30,000 or more for general building contractors.
You are also responsible for pulling building permits before starting work. Permits are required by law in virtually every jurisdiction, and proceeding without one can trigger stop-work orders, fines, and orders to tear out completed work for inspection.
Penalties for Working Outside Your License
Taking a contract above your dollar limit or performing restricted specialty work is a criminal offense in most states. The typical charge is a misdemeanor, though severity varies.
- Jail time for unlicensed or improperly licensed contracting can run up to six months in some states and up to 12 months in others. Repeat offenses or fraudulent use of another contractor’s license may be charged as felonies.
- Many states impose daily fines for each day you operate in violation, on top of the standard criminal fine. The daily penalties can reach several hundred dollars.
- Some states strip unlicensed contractors of the right to file a mechanic’s lien, taking away your primary tool for collecting payment if the owner refuses to pay.
- Regulatory boards can suspend or permanently revoke your license for scope violations.
On top of the criminal exposure, contracts performed without the proper license may be void or unenforceable. An owner who discovers their contractor was improperly licensed can sometimes recover all money paid under the contract, leaving the contractor with no legal remedy to collect for work already completed.