How do I verify a contractor's license?

Every US state has a public contractor licensing board with an online lookup. Search for "[your state] contractor license lookup" or use the direct links below. Enter the contractor's license number (printed on every legitimate quote) or business name. The lookup shows license status (active, expired, suspended), license type (matches the work?), issue and expiration dates, and disciplinary history. Five minutes per contractor; refusal to provide a license number is automatic disqualification.

Why does the state I live in not have one license board?

Some states (Indiana, Maine, Wyoming) leave licensing to local jurisdictions rather than a single state board, so the search happens at the city or county level. A few states (Alabama, Connecticut, Vermont) license general contractors at the state level but leave trades to local jurisdictions. For these states, search both the state board AND the city or county building department where the work will happen. NASCLA (National Association of State Contractors Licensing Agencies) maintains a unified directory.

What fields matter most in the state lookup result?

Four fields are critical. (1) Status — must be Active, not Expired, Suspended, or Revoked. (2) License type — must match the work (e.g., B-General Building or C-39 Roofing in California, depending on what you're hiring for). (3) Name — must exactly match the contractor's business name on the quote and the certificate of insurance. (4) Disciplinary history — look for the last 3 years; a pattern of complaints is the strongest predictor of future problems. Bond and insurance status, where shown, are secondary signals.

My state lookup shows the license is expired — what do I do?

Walk away. An expired license means the contractor cannot legally pull permits in that state until renewal. Even if they renew while you're working, the gap creates legal and warranty issues. Ask each candidate up front: "Is your license currently active in [state]?" — then verify. Some contractors will offer to use a friend's license; this is illegal in most states and gives you no recourse if work fails.

What if the contractor is licensed in a different state than where I live?

For most residential work, the contractor must hold a license in the state where the work happens. A few states have reciprocity agreements (Florida ↔ Georgia, Mississippi ↔ Tennessee) but reciprocity covers fewer license types than people assume. A contractor traveling from another state to do work in your home should hold a valid license in your state. Verify directly; do not rely on the contractor's claim of "we're licensed back home."

How is a contractor license different from registration?

Licensure tests trade competence (an exam, often a written and practical component) and is required for higher-risk trades. Registration is filing paperwork without a competence test — common for handyman work and minor trades. A licensed contractor has been tested; a registered contractor has only filed paperwork. For senior aging-in-place modifications over $5,000, prefer licensed over registered.

What about contractors who claim they "don''t need a license" because the job is small?

Most states have a small-job exemption — typically work under $500 to $1,000 does not require a contractor license. The exemption does not change the homeowner's recourse situation: with an unlicensed contractor, you have no state licensing board to complain to. For senior projects, even small work benefits from a licensed contractor because the licensing board is your enforcement option if something goes wrong. Pay the modest premium for licensed work; the protection is real.

State Contractor License Lookup: All 50 States (2026)

The short version: Every legitimate contractor’s license is verifiable in five minutes at your state’s licensing board. Search “[your state] contractor license lookup” or use the table below for direct links. Check four fields: status (must be Active), license type (must match the work), business name (must match the quote), and disciplinary history (look for patterns, not single old complaints). Refusal to provide a license number is automatic disqualification. For the full contractor vetting workflow, see How to Find a Senior-Friendly Contractor.

Why license verification is the single most important screening step

The state contractor license is your strongest pre-hire screening tool. The reasons:

It tests competence. Most states require a written exam and a practical exam covering code knowledge, safety, and trade fundamentals. A licensed contractor has demonstrated baseline competence; an unlicensed one has not.
It creates enforcement recourse. If a licensed contractor fails to perform or causes damage, you can file with the state licensing board. The board can revoke the license, fine the contractor, or order restitution. With an unlicensed contractor, you have only small-claims court and the contractor’s personal assets — usually a much weaker recourse.
It catches identity issues. State lookup shows the legal name and business name. A contractor working under a different name than their license is often using a borrowed or stolen identity — a strong fraud signal.
It surfaces disciplinary history. Past consumer complaints that resulted in board action are public record. Patterns of complaints predict future problems.
It is free, fast, and authoritative. Three minutes per contractor at the state board. Platform “verified” badges are not substitutes for this direct verification.

For the broader pre-hire process, see How to Find a Senior-Friendly Contractor. For the contractor-side red flags that complement license verification, see Contractor Red Flags That Cost Seniors $50,000.

How to use this guide

Find your state in the table below. Click the lookup URL. Enter the contractor’s name or license number. Check the four critical fields:

Status: Must be Active (not Expired, Suspended, or Revoked)
License type: Must match your work (general / specialty / trade)
Business name: Must match the contractor’s quote and certificate of insurance
Disciplinary history: Look for patterns, not single old complaints

Five minutes per contractor. Worth doing for each of the three contractors in your 3-quote process.

Direct state lookup links (top 25 by population)

The 25 states below cover roughly 85 percent of the US population. NASCLA maintains the full 50-state directory; this table prioritizes the senior population most likely to need senior home modifications.

California (~39M residents)

Licensing authority: Contractors State License Board (CSLB) Lookup: cslb.ca.gov → “Check a License or Home Improvement Salesperson” License classes: A (engineering), B (general building), 40+ C-specialty classes Senior-relevant scopes: B for full remodels; C-36 plumbing; C-10 electrical; C-20 HVAC; C-39 roofing

Texas (~30M)

Licensing authority: Texas Department of Licensing and Regulation (TDLR) for HVAC, electrical, plumbing; no state license for general residential contracting (city/county-level) Lookup: tdlr.texas.gov → license search by trade Note: For non-trade residential work, check city or county building department

Florida (~22M)

Licensing authority: Florida Department of Business and Professional Regulation (DBPR) Lookup: myfloridalicense.com → License Search License types: Certified (state-level) and Registered (local-level); prefer Certified for senior projects Senior-relevant: CGC (Certified General Contractor), CRC (Residential), CBC (Building)

New York (~19M)

Licensing authority: Varies by city; New York City requires HIC (Home Improvement Contractor) license from DCWP Lookup: nyc.gov/dcwp → License Verification (for NYC); outside NYC, check county or town Note: NY State does not have a general statewide contractor license; rely on local jurisdiction + workers comp + GL insurance

Pennsylvania (~13M)

Licensing authority: Pennsylvania Attorney General Bureau of Consumer Protection (registration, not license) Lookup: attorneygeneral.gov → Home Improvement Contractor Search Note: PA requires registration for any contractor doing work over $5,000; lookup shows registration status

Illinois (~12.5M)

Licensing authority: Illinois Department of Financial and Professional Regulation (IDFPR) for some trades; no state general contractor license Lookup: idfpr.com → License Lookup (for licensed trades: plumbers, roofers, electrical varies by municipality) Note: Chicago has its own contractor licensing system separate from state

Ohio (~12M)

Licensing authority: Ohio Construction Industry Licensing Board (OCILB) for specialty trades; no state general contractor license Lookup: com.ohio.gov/dico → Licensee Search Senior-relevant: HVAC, electrical, hydronics, plumbing, refrigeration

Georgia (~11M)

Licensing authority: Georgia State Licensing Board for Residential and General Contractors Lookup: sos.ga.gov → Professional Licensing → Contractor Search License types: Residential General (RG), Residential Light (RL), Residential Basic (RB) by job-size threshold

North Carolina (~10.7M)

Licensing authority: NC Licensing Board for General Contractors (NCLBGC) + NC Board of Examiners for Electrical Contractors Lookup: nclbgc.org → License Search (general) and nceec.org → License Lookup (electrical) Tiers: Limited, Intermediate, Unlimited by project value

Michigan (~10M)

Licensing authority: Michigan Department of Licensing and Regulatory Affairs (LARA) Lookup: michigan.gov/lara → License Search Required: Residential Builder license for work over $600; Maintenance & Alteration license for smaller specialty work

New Jersey (~9.3M)

Licensing authority: NJ Division of Consumer Affairs (Home Improvement Contractor Registration) Lookup: njconsumeraffairs.gov → Verify Licensee → Home Improvement Contractor Note: NJ requires registration, not full license, for HIC; verify both HIC registration AND trade license for electrical/plumbing

Virginia (~8.7M)

Licensing authority: Virginia Department of Professional and Occupational Regulation (DPOR) Lookup: dpor.virginia.gov → License Lookup License classes: A (over $120K), B ($10K-$120K), C ($1K-$10K)

Washington (~8M)

Licensing authority: Washington State Department of Labor & Industries (L&I) Lookup: lni.wa.gov → “Look up a Contractor” Note: WA shows bond and insurance status directly in the lookup; easier verification than most states

Arizona (~7.5M)

Licensing authority: Arizona Registrar of Contractors (AZ ROC) Lookup: roc.az.gov → Contractor Search License types: B-1 (Commercial Building), KA (Residential)

Massachusetts (~7M)

Licensing authority: Massachusetts Office of Consumer Affairs (HIC registration) + Board of Building Regulations and Standards (Construction Supervisor License, CSL) Lookup: mass.gov → license verification Required for seniors: HIC + CSL both needed for residential work over $1,000

Tennessee (~7M)

Licensing authority: Tennessee Board for Licensing Contractors Lookup: tn.gov/commerce/regboards/contractor → License Lookup Required for projects over $25,000; sub-$25K typically falls under home improvement registration

Indiana (~6.8M)

Licensing authority: Local jurisdictions (no state contractor license) Lookup: City or county building department where the work will happen Note: Indianapolis (Marion County) has its own licensing system; check business.indy.gov

Maryland (~6.2M)

Licensing authority: Maryland Home Improvement Commission (MHIC) Lookup: dllr.maryland.gov → MHIC License Search Required: MHIC license for any residential improvement contract

Missouri (~6.2M)

Licensing authority: Varies by municipality (no state contractor license) Lookup: City or county building department; large cities (St. Louis, Kansas City) have their own systems

Wisconsin (~5.9M)

Licensing authority: Wisconsin Department of Safety and Professional Services (DSPS) Lookup: dsps.wi.gov → License Search Required: Dwelling Contractor Certification (DCC) for residential work

Colorado (~5.9M)

Licensing authority: Local jurisdictions; state licenses electrical and plumbing only Lookup: Local building department + dora.colorado.gov for electrical/plumbing

Minnesota (~5.7M)

Licensing authority: Minnesota Department of Labor and Industry Lookup: dli.mn.gov → License Lookup Required: Residential Building Contractor license for work over $15,000

South Carolina (~5.3M)

Licensing authority: SC Department of Labor, Licensing and Regulation (LLR) Lookup: llr.sc.gov → Online Licensee Lookup License types: Mechanical (HVAC), Residential Builder, Residential Specialty

Alabama (~5M)

Licensing authority: Alabama Home Builders Licensure Board + Alabama Licensing Board for General Contractors Lookup: hblb.alabama.gov (home builders) and genconbd.alabama.gov (general) Threshold: Homes over $10,000 require Home Builder license; commercial varies

Louisiana (~4.6M)

Licensing authority: Louisiana State Licensing Board for Contractors (LSLBC) Lookup: lslbc.louisiana.gov → License Search Required: Residential Building license for homes over $75,000 in value or projects over $7,500

States without a single statewide license (special handling)

For states where licensing happens at the city or county level (Indiana, Missouri, parts of Texas and Illinois), use this workflow:

Identify the jurisdiction where the work will happen
Search “[city or county] contractor license lookup” or “[city or county] building department”
Use the local building department’s online verification or call directly
Cross-check with the state Attorney General for any consumer complaints filed at the state level

For these states, also verify the contractor’s general liability insurance and workers compensation directly with the carrier (not just trusting the contractor’s certificate). State-level enforcement may be limited, so verification rigor matters more.

What the state lookup does not tell you

The state board lookup is the strongest single screen, but not the only one. It does not show:

Current insurance status — verify general liability and workers comp with the carrier directly
Current bond status — some states show this, many do not
Senior-specific competence — CAPS, OT-collaboration experience, ADA knowledge (verify these separately via NAHB’s CAPS directory)
Current employee composition — apprentices vs journeymen vs masters on your specific project
Subcontractor list — most state boards license only general contractors, not their subs

Combine state license verification with the full 3-quote method and the contractor red flags checklist for the complete pre-hire screen.

The 30-second summary:

Every state has a contractor license lookup; finding it takes 3 minutes.
Check 4 fields: Active status, License type matches work, Business name matches quote, no recent pattern of discipline.
Save a screenshot of the verification with the date — your documentation if something goes wrong later.
Refusal to provide license number = automatic disqualification.
Some states (Indiana, Missouri, parts of TX/IL) license locally, not at state level — check city or county building department.
License verification is the strongest single screen, but combine with insurance verification + senior-specific references.

How to Find a Senior-Friendly Contractor — master pillar
Three-Quote Method: Fair Pricing for Seniors — comparison process
Contractor Red Flags That Cost Seniors $50,000
HomeAdvisor for Seniors: Honest 2026 Review
Angi for Aging-in-Place Contractors
Find a Licensed Electrician for Senior Homes — electrical-specific verification
NATE Certification for HVAC Hires — HVAC-specific verification
Working with an OT for Home Modifications — clinical credential
What is a CAPS Specialist — senior-modification credential

Citations

State Contractor Licensing Board Directory. National Association of State Contractors Licensing Agencies (NASCLA), retrieved May 14, 2026. nascla.org.

Hiring a Contractor: Tips for Avoiding Home Improvement Fraud. U.S. Federal Trade Commission, 2024. consumer.ftc.gov.

Home Improvement Scams Targeting Older Adults. AARP Fraud Watch Network, June 2024. aarp.org/fraud-watch.

Senior Scam Alert and Reporting. U.S. Department of Justice Elder Justice Initiative, 2024. justice.gov/elderjustice.