How many licensed contractors are in Diamond Bar, California?

There are 294 contractors registered with the California Contractors State License Board (CSLB) in Diamond Bar. Of these, 281 hold active licenses (96%). SiteVetter cross-checks each contractor against 6 data sources including SAM.gov, OSHA, DOL, EPA, and building permits.

How do I verify a contractor in Diamond Bar?

To verify a Diamond Bar contractor: (1) Check their CSLB license status is Active, (2) Confirm workers' compensation insurance is current, (3) Verify they carry a contractor bond of at least $25,000, (4) Search SAM.gov for federal debarments, (5) Check OSHA and DOL for safety or wage violations. SiteVetter runs all 5 checks in seconds.

What percentage of Diamond Bar contractors have federal violations?

1.4% of contractors in Diamond Bar (4 out of 294) 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.

Verify Diamond Bar Contractors - Page 6 | CSLB + Federal Records

How to Verify a Contractor in Diamond Bar

Manual contractor vetting takes 45+ minutes per sub and still misses violations in databases you don't know exist. SiteVetter runs 6 data source checks in seconds: CSLB license status, SAM.gov federal debarment, DOL wage violations, OSHA safety citations, EPA environmental records, and building permits.

Contractors in Diamond Bar serve local residential and commercial construction needs.

Of the 294 CSLB-registered contractors in Diamond Bar, 96% hold active licenses and 4 have at least one record in federal databases. Under California's "Controlling Employer" doctrine, general contractors can be held liable for subcontractor safety violations—making verification a legal necessity, not optional due diligence.

5-Point Verification Checklist for Diamond Bar 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

Diamond Bar Contractor Verification - Page 6

Diamond Bar Contractors

How to Verify a Contractor in Diamond Bar

5-Point Verification Checklist for Diamond Bar Contractors