CheckLicensed Blog
Guides and research on verifying contractors before you hire.
Page 10 of 45
April 2026 · 5 min read
Arizona has a two-track system: ROC L-11 license for electrical contractors and a separate DFBLS license for individual electricians. Here's how to verify both before hiring.
Read more →April 2026 · 5 min read
Arizona requires plumbing contractors to hold an ROC license (L-37 classification) with a $5,000 minimum bond. Unlicensed plumbing is a Class 1 misdemeanor. Here's how to verify at roc.az.gov.
Read more →April 2026 · 5 min read
Arizona requires HVAC contractors to hold an ROC license (C-39 classification) with a $5,000 minimum bond. EPA Section 608 certification is required for refrigerant handling. Here's how to verify.
Read more →April 2026 · 5 min read
Massachusetts roofers need both a Construction Supervisor License (CSL) and a Home Improvement Contractor (HIC) registration with a $5,000 bond. Here's how to verify both at mass.gov.
Read more →April 2026 · 6 min read
Wisconsin licenses over 40,000 plumbers through DSPS and requires Master, Journeyman, or Apprentice credentials for anyone performing plumbing work. Here's how to verify any Wisconsin plumber at licensesearch.wi.gov.
Read more →April 2026 · 6 min read
Wisconsin requires HVAC contractors to register through DSPS and residential installers to hold a Dwelling Contractor Qualifier credential. Here's how to verify any Wisconsin HVAC contractor at licensesearch.wi.gov.
Read more →April 2026 · 6 min read
Colorado has no statewide roofing license, but Denver requires local contractor registration and insurance requirements apply statewide. Here's how to verify any Colorado roofer's credentials before signing a contract.
Read more →April 2026 · 6 min read
Colorado licenses electricians through DORA's Office of Electrical Safety and requires a $10,000 bond for electrical contractors. Here's how to verify any Colorado electrician or electrical contractor at dora.colorado.gov.
Read more →April 2026 · 6 min read
Colorado licenses plumbers through the State Plumbing Board at DORA with Master and Journeyman credentials. Here's how to verify any Colorado plumber's license at dora.colorado.gov before work begins.
Read more →April 2026 · 6 min read
Colorado has no statewide HVAC license, but local permits are required statewide and EPA Section 608 certification is federally mandated for refrigerant work. Here's how to verify Colorado HVAC contractors before hiring.
Read more →April 2026 · 6 min read
Minnesota requires a Residential Contractor license through DLI for roofing on residential buildings, with a $15,000 bond and up to $5,000 in fines for unlicensed work. Here's how to verify any MN roofer at dli.mn.gov.
Read more →April 2026 · 6 min read
Alabama roofing license requirements split between two boards depending on project type. Learn which board to check, how to verify credentials, bond requirements, and the risks of hiring unlicensed.
Read more →April 2026 · 6 min read
Alabama licenses electricians through the Alabama Electrical Contractors Board with three distinct license types. Learn how to verify credentials at aecb.alabama.gov, bond requirements, and the risks of unlicensed electrical work.
Read more →April 2026 · 6 min read
Alabama licenses plumbers through the Alabama Plumbers & Gas Fitters Examining Board with Master and Journeyman tiers. Learn where to verify credentials, bond requirements, and what unpermitted plumbing costs at resale.
Read more →April 2026 · 6 min read
Alabama HVAC contractors are licensed through the Alabama Electrical Contractors Board. Learn how to verify credentials, why EPA 608 certification is required on top of the state license, and the risks of hiring unlicensed.
Read more →April 2026 · 6 min read
Louisiana requires LSLBC licensing for all residential roofing work regardless of project value — one of the strictest standards in the South. Learn how to verify at lslbc.louisiana.gov, bond requirements, and the misdemeanor penalties for unlicensed work.
Read more →April 2026 · 6 min read
Louisiana licenses electrical contractors through the LSLBC at lslbc.louisiana.gov. Learn what the license covers, bond and insurance requirements, and the consequences of hiring unlicensed.
Read more →April 2026 · 6 min read
Louisiana licenses plumbers through the dedicated Louisiana State Plumbing Board at lspb.louisiana.gov, separate from the general contractor board. Learn the Master and Journeyman tiers, how to verify, and the risks of unpermitted plumbing.
Read more →April 2026 · 6 min read
Louisiana licenses HVAC contractors through the LSLBC at lslbc.louisiana.gov, with EPA 608 certification required for refrigerant work. Learn how to verify, bond requirements, and the safety risks of unlicensed installation.
Read more →April 2026 · 6 min read
Minnesota requires electricians to hold a state license from the Department of Labor and Industry (dli.mn.gov). Here's how to verify any MN electrician, understand license types, and check bond and insurance.
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