Best Licensed Concrete Contractors in Concord, CA
20 concrete companies registered in Concord 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; 21 registered in Concord
- California requires workers' compensation cover for C-8 licensees: 17 of Concord's 21 licenses (81.0%) carry a current policy with CSLB
- Median time licensed in Concord: 10 years
- Longest Concord licensure: since 1929
- 14 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1929
- Phone
- (925) 602-6400
2.Conco
- Verified
- August 17, 2026
- Licensed since
- 1961
- Phone
- (925) 685-6799
- Verified
- August 17, 2026
- Licensed since
- 1983
- Phone
- (925) 872-3869
- Verified
- August 17, 2026
- Licensed since
- 1983
- Phone
- (925) 803-4111
- Verified
- August 17, 2026
- Licensed since
- 1997
- Phone
- (925) 998-8574
- Verified
- August 17, 2026
- Licensed since
- 2006
- Phone
- (510) 444-7678
- Verified
- August 17, 2026
- Licensed since
- 2006
- Phone
- (925) 849-6033
- Verified
- August 17, 2026
- Licensed since
- 2008
- Phone
- (925) 520-9673
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Swinerton Builders | #92 | On file | 1929 |
| Conco | #199902 | On file | 1961 |
| James E Madison Concrete Repair | #435209 | On file | 1983 |
| Mce Corporation | #439295 | Exempt or none on file | 1983 |
| Hesselberg Concrete | #732688 | On file | 1997 |
| Smart Building Inc. | #875390 | On file | 2006 |
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, 21 of them registered in Concord. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Concord license has been held 10 years, and the longest-standing one dates to 1929. 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: 17 of Concord's 21 licenses (81.0%) 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 Concord: common questions
How many licensed concrete contractors are there in Concord?
21 active C-8 concrete licenses are registered in Concord, out of 142 across Contra Costa County. 20 Concord-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. 21 active C-8 concrete licenses are registered in Concord and 142 across Contra Costa County, the longest-standing issued in 1929. 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 17 of Concord's 21 currently carry. 14 Contra Costa County licenses expire within 90 days.