How to Vet a Contractor's License and Insurance

To verify a contractor's license and insurance, search your state licensing board's online database directly -- never rely on documents the contractor hands you. Confirm that general liability and workers compensation policies are active by calling the insurer listed on the Certificate of Insurance. Licensing requirements and required coverage amounts differ by state and trade; the sections below walk through each step in detail.

Why Vetting Credentials Before Signing Matters

Hiring a contractor without checking credentials is not a paperwork formality -- it is a financial and legal exposure that lands on you, the homeowner. The Federal Trade Commission advises consumers to verify contractor credentials before any home improvement work begins, noting that unlicensed operators are a common vector for home improvement fraud. Problems that surface after work starts -- unpermitted work, on-site injuries, property damage -- are far harder and more expensive to resolve than a 20-minute check before you hand over a deposit.

The process breaks into four areas: license verification, general liability insurance, workers compensation insurance, and bonding. Each protects you against a different category of risk. Understanding what each one does, and how to confirm it is real, keeps you in control of the conversation.

If you are still in the contractor-selection phase, How to Hire a General Contractor: A Step-by-Step Guide covers the full hiring process from collecting bids through signing a contract.

How to Verify a Contractor's License Through the State Board

Contractor licensing is regulated at the state level, and in some states at the county or city level as well. The National Association of State Contractors Licensing Agencies (NASCLA) maintains a publicly accessible directory of every state licensing board at nascla.org -- that is the fastest way to find the right lookup tool for your location.

Once you are on your state board's site, you can typically search by the contractor's business name, owner name, or license number. The record will show:

• Whether the license is active or lapsed
• The license class or type (general contractor, specialty trade, etc.)
• The expiration date
• Any disciplinary actions, complaints, or suspensions on file

What License Classes Mean

Many states issue tiered licenses that define the scope of work a contractor is legally permitted to perform. Class A or unrestricted general contractor licenses typically cover projects of any size and complexity. Class B or intermediate licenses may cap project value -- commonly at $500,000 or $1,000,000 -- or restrict the types of structures the contractor may work on. Class C or specialty trade licenses cover a single trade: electrical, plumbing, HVAC, roofing, or similar.

If a contractor holds only a specialty trade license, they are not legally authorized to act as a general contractor on a full renovation. Ask which class the license is and confirm it fits the scope of your project before going further.

The Two Insurance Types That Protect Homeowners

A contractor can carry two distinct types of insurance, and each covers a completely different category of risk. General liability and workers compensation are not interchangeable -- you need to confirm both are in place before work begins.

General Liability Insurance

General liability (GL) insurance covers property damage and third-party bodily injury that arises from the contractor's work. If a worker accidentally breaks a water line and floods your basement, or if a passerby is injured by falling debris, GL insurance is what pays for the damage.

GL policies are written with per-occurrence and aggregate limits. A policy with a $1,000,000 per-occurrence limit covers up to that amount for a single incident. For most residential projects, the Insurance Information Institute recommends confirming that a contractor carries at least $1,000,000 per occurrence; large or complex projects may warrant higher limits. Ask the contractor what their limits are and confirm those amounts on the Certificate of Insurance.

Workers Compensation Insurance

Workers compensation covers medical expenses and lost wages for workers who are injured on the job -- at your property. This is the coverage that protects you personally. If a roofer falls from your roof and the contractor does not carry workers comp, you may be liable for that worker's medical bills and wage replacement under your state's labor laws.

Workers comp requirements vary by state. Many states require it for any employer with at least one employee; some states exempt very small businesses or sole proprietors. The fact that a contractor says they are a sole proprietor or use only subcontractors does not automatically eliminate your exposure -- your state's rules govern. Check with your state's Department of Labor or workers compensation board if you are uncertain.

How to Request and Verify a Certificate of Insurance

A Certificate of Insurance (COI) is a standardized one-page summary of a contractor's active insurance policies. It lists the insurer name, policy numbers, coverage types, coverage limits, and expiration dates. Reputable contractors carry these and expect to provide one on request before any signed agreement.

When you review the COI, confirm the following:

• The named insured matches the contractor's business name exactly
• The policy expiration date is after your project's estimated completion date
• The general liability limit is adequate for your project scope
• Workers compensation is listed and active (or you have a written exemption from your state if the contractor is a sole proprietor who is genuinely exempt under state law)
• Your name or address appears as the certificate holder or additional insured if you requested it

Bonding: What a Surety Bond Does (and Does Not Do)

A surety bond is a three-party financial guarantee. The contractor (the principal) buys the bond from a surety company, which guarantees to you (the obligee) that the contractor will fulfill the terms of the contract. If the contractor walks off the job, does substandard work, or causes financial harm, you can file a claim against the bond.

Bonding is not a substitute for insurance. A surety bond does not cover worker injuries, it does not cover third-party property damage during construction, and it does not pay out automatically -- you must file a claim and demonstrate a covered loss. Bond amounts are often relatively modest for residential work, commonly in the range of $10,000 to $25,000, which may not fully cover a large-scale project loss.

To verify a bond, ask the contractor for the bond number and the name of the surety company. Call the surety company directly to confirm the bond is active and the amount. State licensing boards sometimes require proof of bonding as a condition of licensure, so the license lookup you already performed may also confirm bonding status.

Credentials at a Glance

The Practical Risk of Hiring Without Verification

The consequences of skipping this process are concrete and documented. The FTC and state attorneys general offices consistently receive complaints about home improvement fraud involving unlicensed contractors -- work that fails inspection, must be torn out and redone, or is never completed after a large deposit is paid.

Beyond fraud, the liability exposure from uninsured workers is a risk that surprises many homeowners. Most people assume their homeowner's insurance policy covers anything that happens on their property. It often does not cover business activities, and an injured worker's attorney does not need to prove negligence -- they need to prove the worker was injured on your property performing work under your direction, and you did not verify insurance coverage.

For a full picture of how unlicensed contractors operate and what the warning signs look like, see Licensed vs Unlicensed Contractor: The Real Risks and How to Avoid Home Improvement Scams.

What to Do If a Contractor Cannot Provide Credentials

A licensed, insured, and bonded contractor will not hesitate when you ask for their license number and a COI. Resistance, vague answers, or claims that "insurance slows down the job" are warning signs -- not explanations.

If a contractor cannot provide verifiable credentials:

1. Do not sign anything or pay a deposit.
2. Contact your state licensing board to ask whether the contractor has a pending application or any exemption.
3. Get three or more additional quotes from contractors who can provide verifiable credentials before making any decision.

Before you sign any agreement with the contractor you select, review How to Read a Contractor Contract Before You Sign to confirm the contract itself reflects the license number, insurer information, and scope of work accurately.