What is a SiteVetter Safety Score?

A SiteVetter Safety Score is a 0-100 rating that measures contractor compliance across 6 data sources: CSLB license status, workers' compensation coverage, contractor bonding, SAM.gov federal debarment records, OSHA safety inspections, DOL wage violation records, and building permit history. Contractors with scores of 85+ are considered top-rated.

How many top-rated contractors are in Diamond Bar, CA?

There are currently 50 contractors in Diamond Bar, California with Safety Scores of 85 or higher. These contractors have active CSLB licenses, proper insurance and bonding, and clean federal compliance records.

How often are Safety Scores updated?

Safety Scores are updated weekly when new data is pulled from government sources. CSLB license data refreshes every Monday, and federal database checks (SAM.gov, OSHA, DOL) run on the same schedule.

What does a Safety Score grade mean?

Safety Score grades are: A (90-100) = Excellent compliance, B (80-89) = Good standing, C (70-79) = Adequate, D (50-69) = Concerns present, F (below 50) = Significant issues. Only Grade A and high Grade B contractors appear on top-rated pages.

Top-Rated Contractors in Diamond Bar, CA | Best 2026

How We Calculate Safety Scores

Our Safety Score aggregates data from 6 sources: CSLB license status, workers' compensation coverage, contractor bonding, federal databases including SAM.gov (debarment), OSHA (safety violations), DOL (wage violations), and building permits. Scores of 85+ indicate contractors with active licenses, proper insurance, and clean federal records.

Finding the Best Contractors in Diamond Bar

When hiring a contractor in Diamond Bar, California, due diligence matters. The contractors listed above have been verified against multiple government databases and achieved Safety Scores of 85 or higher—placing them among the most compliant contractors in the area.

Our Safety Score considers:

License Status — Active CSLB license with proper classifications
Workers' Compensation — Current coverage to protect you from liability
Contractor Bond — Financial protection if work isn't completed
Federal Compliance — No debarments, wage violations, or safety citations

While a high Safety Score is a strong indicator of a reputable contractor, we always recommend getting multiple quotes, checking references, and verifying the contractor is licensed for your specific type of project.

Top-Rated Contractors in Diamond Bar

How We Calculate Safety Scores

Top 50 Contractors by Safety Score

Finding the Best Contractors in Diamond Bar