Best Licensed Concrete Contractors in Altadena, CA
4 concrete companies registered in Altadena hold current CSLB licenses, verified against official records as of August 17, 2026. All 4 are listed below, ordered by years licensed.
- 778 active C-8 concrete licenses in Los Angeles County; 4 registered in Altadena
- California requires workers' compensation cover for C-8 licensees: 3 of Altadena's 4 licenses (75.0%) carry a current policy with CSLB
- Median time licensed in Altadena: 7 years
- Longest Altadena licensure: since 1986
- 63 county licenses reach their expiration date within 90 days
We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.
- Verified
- August 17, 2026
- Licensed since
- 1986
- Phone
- (626) 798-0104
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (818) 790-8607
- Verified
- August 17, 2026
- Licensed since
- 2018
- Phone
- (626) 486-7397
- Verified
- August 17, 2026
- Licensed since
- 2026
- Phone
- (818) 303-5129
Compare the top 4 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Halpin Brothers Inc. | #501705 | On file | 1986 |
| Environmental Landscape Development Inc. | #902300 | Exempt or none on file | 2007 |
| Mario Vasquez Rojas | #1044753 | On file | 2018 |
| Integrity Custom Built | #1150717 | On file | 2026 |
Los Angeles County concrete licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 778 active C-8 concrete licenses in Los Angeles County, 4 of them registered in Altadena. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Altadena license has been held 7 years, and the longest-standing one dates to 1986. 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: 3 of Altadena's 4 licenses (75.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 776 of the county's 778 licenses carry the same $25,000 bond California sets by statute. 63 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 Altadena: common questions
How many licensed concrete contractors are there in Altadena?
4 active C-8 concrete licenses are registered in Altadena, out of 778 across Los Angeles County. 4 Altadena-registered companies passed our license verification, and all 4 are listed on this page. 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. 4 active C-8 concrete licenses are registered in Altadena and 778 across Los Angeles County, the longest-standing issued in 1986. 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 3 of Altadena's 4 currently carry. 63 Los Angeles County licenses expire within 90 days.