Best Licensed Concrete Contractors in Pittsburg, CA
14 concrete companies registered in Pittsburg hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 142 active C-8 concrete licenses in Contra Costa County; 14 registered in Pittsburg
- California requires workers' compensation cover for C-8 licensees: 13 of Pittsburg's 14 licenses (92.9%) carry a current policy with CSLB
- Median time licensed in Pittsburg: 6 years
- Longest Pittsburg licensure: since 1988
- 14 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1988
- Phone
- (925) 473-9500
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (925) 727-7293
- Verified
- August 17, 2026
- Licensed since
- 2012
- Phone
- (925) 207-4593
- Verified
- August 17, 2026
- Licensed since
- 2014
- Phone
- (925) 915-5240
- Verified
- August 17, 2026
- Licensed since
- 2014
- Phone
- (925) 577-8992
- Verified
- August 17, 2026
- Licensed since
- 2016
- Phone
- (925) 352-7964
- Verified
- August 17, 2026
- Licensed since
- 2019
- Phone
- (925) 494-4420
- Verified
- August 17, 2026
- Licensed since
- 2019
- Phone
- (925) 698-4813
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Mt Diablo Flooring Systems Inc. | #526336 | On file | 1988 |
| Kool Concrete | #893251 | On file | 2007 |
| R M J Concrete | #977815 | On file | 2012 |
| Islander Concrete | #989994 | On file | 2014 |
| Oakmount Concrete | #991529 | On file | 2014 |
| R G M Builders Inc. | #1010334 | On file | 2016 |
Contra Costa County concrete licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 142 active C-8 concrete licenses in Contra Costa County, 14 of them registered in Pittsburg. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Pittsburg license has been held 6 years, and the longest-standing one dates to 1988. 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: 13 of Pittsburg's 14 licenses (92.9%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 142 of the county's 142 licenses carry the same $25,000 bond California sets by statute. 14 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 Pittsburg: common questions
How many licensed concrete contractors are there in Pittsburg?
14 active C-8 concrete licenses are registered in Pittsburg, out of 142 across Contra Costa County. 14 Pittsburg-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. 14 active C-8 concrete licenses are registered in Pittsburg and 142 across Contra Costa County, the longest-standing issued in 1988. 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 13 of Pittsburg's 14 currently carry. 14 Contra Costa County licenses expire within 90 days.