Concrete contractors in Ontario by the numbers
Ontario is home to 29 licensed concrete contractors (C-8, CSLB September 2026) — #29 in California, about 3% of the 885 contractor licenses based here.
Nearby in San Bernardino County: San Bernardino (40), Fontana (23), Rancho Cucamonga (22), Hesperia (21).
66% of Ontario's C-8 licensees hold more than one classification — most often B General Building Contractor (41%), A General Engineering Contractor (21%). Extra classifications can change how carriers rate your general liability and workers' comp, so list every license class when you quote.
Business structure: 38% sole owners, 59% corporations, 0% LLCs; median time licensed 18.5 years.
What carriers look at
For concrete contractors, underwriters focus first on: concrete washout and runoff that can trigger property or pollution claims; and pump and mixer trucks, dump trucks and trailers moving heavy loads. See the full coverage guide for concrete contractors for limits, endorsements and workers' comp rules.
Get a quote
Asena Capital Insurance Services compares multiple markets for Ontario contractors and requests additional insured endorsements for you when a contract calls for them. Call (858) 925-9555 or request a quote — only your name, phone and email are required. CA License #6008596.
Frequently asked questions
How many licensed concrete contractors are in Ontario?
29 active C-8 licenses have a business address in Ontario (CSLB, September 2026); 90% carry workers' comp and 0% are filed exempt.
Do C-8 concrete contractors need workers' comp with no employees?
Yes. Since January 1, 2023, CSLB requires a workers' comp policy on file for every active C-8 license, regardless of employees. The exemption is no longer available for this classification.