California
Contractors State License Board (CSLB)
Live lookup
California's state contractor regulator since 1929. Every contractor bidding work $500 or more must hold an active CSLB license with classifications A (engineering), B (general building), B-2 (residential remodeling), or a C-specialty.
Number format: 5-8 digit license number (CSLB zero-pads internally but accepts unpadded queries).
Arizona
Arizona Registrar of Contractors (ROC)
Live lookup
Arizona Registrar of Contractors — dual-track regulator under ARS Title 32 Ch. 10. Residential and commercial are separate license classes. The Residential Contractors Recovery Fund backs homeowners against fraud by licensed contractors.
Number format: Prefixed 'K-' (residential), 'L-' (dual), or a bare integer. Uppercase and strip spaces.
Nevada
Nevada State Contractors Board (NSCB)
Live lookup
Nevada State Contractors Board enforces a monetary-limit tier per license. A contractor licensed to a $75,000 monetary limit cannot legally bid a $200,000 project, even with the right classification.
Number format: 6-digit license number. Monetary limit and bond amount print on the detail page.
Washington
Washington State Department of Labor and Industries (L and I)
Live lookup
Washington uses registration (not exam-based licensure) with mandatory bonds — $12K for General, $6K for Specialty — verifiable live. Seattle SDCI permits won't issue to an unregistered contractor. Electricians and plumbers are separate trade-card registries.
Number format: Contractor registration number. Status field is clean: Active / Expired / Suspended / Revoked.
Florida
Florida Construction Industry Licensing Board (CILB / DBPR)
Live lookup
Florida's CILB distinguishes Certified (statewide) contractors from Registered (county-only) contractors — a verification trap. Miami-Dade and Broward fall inside the High-Velocity Hurricane Zone, requiring Notice of Acceptance-approved exterior products.
Number format: CGC#### (Certified General), CBC#### (Certified Building), CRC#### (Certified Residential).
Texas
Texas TDLR (trades) + TSBPE (plumbing) - composite
Live lookup
Texas does NOT issue a state-level general contractor license. TDLR licenses Electrician and HVAC trades; TSBPE licenses plumbers. Austin, Houston, Dallas, and San Antonio run municipal GC registration programs. RCLA substitutes some state-level homeowner protections.
Number format: TDLR trade-card number. Lookup fans out across Electrician, HVAC, and Plumbing registries.
Georgia
Georgia State Licensing Board for Residential and General Contractors (GSBLC)
Live lookup
Georgia State Licensing Board for Residential and General Contractors. License prefix signals tier: RBQA (Residential-Basic), RBCO (Residential-Light-Commercial), GCCO (Unlimited General). Tier matters for job-size matching.
Number format: Format RBQA-######, RBCO-######, GCCO-######, or RBQE-###### (Qualifying Agent).
New York (state, outside NYC)
New York State Department of State, Division of Licensing Services
Live lookup
New York STATE does NOT license general contractors. NY Department of State licenses Home Improvement Contractors outside NYC (Long Island, Westchester, upstate). Inside the five boroughs, verification routes to NYC DOB and DCWP.
Number format: DOS HIC registration number. For five-borough work, use the NYC row below.
New York City (five boroughs)
New York City DOB (LMP / LME) + DCWP (HIC) - composite
Live lookup
NYC splits regulation across DOB (construction trades — Licensed Master Plumber, Licensed Master Electrician) and DCWP (Home Improvement Contractor, the GC-equivalent). HIC licensing is DCWP, not DOB — a common verification trap.
Number format: Prefix 'LMP:', 'LME:', or 'HIC:' to route. Bare numeric defaults to Licensed Master Plumber.
Illinois
Illinois Department of Financial and Professional Regulation (IDFPR)
Live lookup
Illinois does NOT issue a state-level general contractor license. IDFPR's only construction-adjacent credential is the Roofing Contractor. General contracting is a city-level registration — Chicago GCs register through BACP.
Number format: IDFPR roofing license (profession 105). GC queries return not-found with a Chicago BACP pointer.