How many licensed contractors are in Ontario, California?

There are 982 contractors registered with the California Contractors State License Board (CSLB) in Ontario. Of these, 913 hold active licenses (93%). SiteVetter's Ontario contractor license lookup cross-checks each record against 6 data sources including SAM.gov, OSHA, DOL, EPA, and building permits.

How do I look up a contractor license in Ontario?

To look up a Ontario contractor license: (1) Check CSLB license status, (2) Confirm workers' compensation insurance, (3) Verify the contractor bond, (4) Search SAM.gov for federal debarments, (5) Check OSHA and DOL for safety or wage violations. SiteVetter runs these checks in seconds.

What percentage of Ontario contractors have federal violations?

4.6% of contractors in Ontario (45 out of 982) have at least one record in federal databases including SAM.gov debarments, DOL wage violations, OSHA safety citations, or EPA environmental violations. These records don't automatically mean a contractor is unsafe, but warrant review before hiring.

Licensed Contractors in Ontario, CA - Page 16 | CSLB License Lookup

Ontario Contractor License Lookup

Use this page when you need a Ontario contractor license lookup, a list of licensed general contractors in Ontario, or a fast way to screen specialty subs before bid award. Each profile starts from CSLB license data and adds federal safety, wage, debarment, environmental, and permit records.

These records cover contractors based in Ontario. The list includes general building contractors and specialty trades, with license number, status, primary classification, and federal record count shown before you open a full profile.

Of the 982 CSLB-registered contractors in Ontario, 93% hold active licenses and 45 have at least one record in federal databases. For GCs verifying subs, that means a standard CSLB status check is only the first pass; the risk review also needs workers' comp, bond, SAM.gov, OSHA, DOL, EPA, and permit checks.

What to Check for Ontario Contractors

CSLB License: Confirm Active status (not Suspended, Revoked, or Expired)
Workers' Comp: Verify current coverage; exempt status means no employees
Contractor Bond: California requires $25,000 minimum (SB 607, Jan 2023)
Federal Debarment: Search SAM.gov for exclusion records
Safety & Wage History: Check OSHA citations and DOL wage violations

Licensed Contractors in Ontario, CA - Page 16

Ontario Contractor License Records

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What to Check for Ontario Contractors