Best Licensed Concrete Contractors in Ontario, CA
26 concrete companies registered in Ontario hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 297 active C-8 concrete licenses in San Bernardino County; 27 registered in Ontario
- California requires workers' compensation cover for C-8 licensees: 25 of Ontario's 27 licenses (92.6%) carry a current policy with CSLB
- Median time licensed in Ontario: 15 years
- Longest Ontario licensure: since 1981
- 24 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1981
- Phone
- (909) 627-5477
- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (909) 947-4601
- Verified
- August 17, 2026
- Licensed since
- 1984
- Phone
- (909) 644-2013
- Verified
- August 17, 2026
- Licensed since
- 1985
- Phone
- (909) 923-5844
- Verified
- August 17, 2026
- Licensed since
- 1987
- Phone
- (909) 947-6474
- Verified
- August 17, 2026
- Licensed since
- 1990
- Phone
- (909) 988-5054
- Verified
- August 17, 2026
- Licensed since
- 2001
- Phone
- (909) 331-7674
- Verified
- August 17, 2026
- Licensed since
- 2001
- Phone
- (909) 986-7878
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Cano Architecture Concrete Repair | #414320 | Exempt or none on file | 1981 |
| Spec Construction Co Inc. | #419626 | On file | 1982 |
| Ajb Concrete & Masonry Construction | #463690 | On file | 1984 |
| Correa Construction | #482342 | On file | 1985 |
| M & R Construction Services Inc. | #508404 | On file | 1987 |
| K A R Construction Inc. | #595709 | On file | 1990 |
San Bernardino County concrete licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 297 active C-8 concrete licenses in San Bernardino County, 27 of them registered in Ontario. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Ontario license has been held 15 years, and the longest-standing one dates to 1981. California law requires workers' compensation cover for C-8 licensees, so it is a legal baseline rather than a way to tell two contractors apart: 25 of Ontario's 27 licenses (92.6%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 297 of the county's 297 licenses carry the same $25,000 bond California sets by statute. 24 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.
Concrete Contractors in Ontario: common questions
How many licensed concrete contractors are there in Ontario?
27 active C-8 concrete licenses are registered in Ontario, out of 297 across San Bernardino County. 26 Ontario-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license concrete contractors?
Yes. California licenses contractors by classification, and C-8 is the CSLB classification that authorises this work. 27 active C-8 concrete licenses are registered in Ontario and 297 across San Bernardino County, the longest-standing issued in 1981. Only CLEAR, unexpired licenses appear here.
How do I check a concrete contractor's license in California?
Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which California requires of C-8 licensees and 25 of Ontario's 27 currently carry. 24 San Bernardino County licenses expire within 90 days.