Best Licensed General Contractors in Alamo, CA
73 general contractors registered in Alamo hold current CSLB licenses, verified against official records as of August 22, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
- 3,193 active B general building contractor licenses in Contra Costa County; 75 registered in Alamo
- 32 of Alamo's 75 licenses (42.7%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Alamo: 26 years
- Longest Alamo licensure: since 1976
- 284 county licenses reach their expiration date within 90 days
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- Verified
- August 22, 2026
- Licensed since
- 1976
- Phone
- (925) 820-9245
- Verified
- August 22, 2026
- Licensed since
- 1978
- Phone
- (925) 743-1536
- Verified
- August 22, 2026
- Licensed since
- 1983
- Phone
- (925) 687-7791
- Verified
- August 22, 2026
- Licensed since
- 1984
- Phone
- (925) 451-7748
- Verified
- August 22, 2026
- Licensed since
- 1984
- Phone
- (925) 820-4323
- Verified
- August 22, 2026
- Licensed since
- 1987
- Phone
- (925) 765-6464
- Verified
- August 22, 2026
- Licensed since
- 1989
- Phone
- (925) 906-9942
- Verified
- August 22, 2026
- Licensed since
- 1989
- Phone
- (925) 915-5686
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| R L Ziegenbein Construction Inc. | #322200 | On file | 1976 |
| D W Young Construction Company Inc. | #365358 | On file | 1978 |
| J D Henley General Contractor | #436566 | On file | 1983 |
| Bifulco Builders Inc. | #455242 | On file | 1984 |
| Mellinger Construction Inc. | #457088 | On file | 1984 |
| Rkh Constructors Inc. | #522195 | On file | 1987 |
Contra Costa County general building licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 3,193 active B general building contractor licenses in Contra Costa County, 75 of them registered in Alamo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Alamo license has been held 26 years, and the longest-standing one dates to 1976. 32 of Alamo's 75 licenses (42.7%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 3,192 of the county's 3,193 licenses carry the same $25,000 bond California sets by statute. 284 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.
General Contractors in Alamo: common questions
How many licensed general contractors are there in Alamo?
75 active B general building contractor licenses are registered in Alamo, out of 3,193 across Contra Costa County. 73 Alamo-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 general contractors?
Yes. California licenses contractors by classification, and B is the CSLB classification that authorises this work. 75 active B general building contractor licenses are registered in Alamo and 3,193 across Contra Costa County, the longest-standing issued in 1976. Only CLEAR, unexpired licenses appear here.
How do I check a general 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 32 of Alamo's 75 currently carry. 284 Contra Costa County licenses expire within 90 days.