Best Licensed General Contractors in Clayton, CA
72 general contractors registered in Clayton 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; 72 registered in Clayton
- 30 of Clayton's 72 licenses (41.7%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Clayton: 22 years
- Longest Clayton licensure: since 1976
- 284 county licenses reach their expiration date within 90 days
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- Verified
- August 22, 2026
- Licensed since
- 1979
- Phone
- (925) 557-6898
- Verified
- August 22, 2026
- Licensed since
- 1979
- Phone
- (925) 676-1545
- Verified
- August 22, 2026
- Licensed since
- 1985
- Phone
- (925) 382-8213
- Verified
- August 22, 2026
- Licensed since
- 1988
- Phone
- (925) 672-2460
- Verified
- August 22, 2026
- Licensed since
- 1991
- Phone
- (925) 998-7200
- Verified
- August 22, 2026
- Licensed since
- 1992
- Phone
- (925) 363-3000
- Verified
- August 22, 2026
- Licensed since
- 1995
- Phone
- (510) 384-6077
- Verified
- August 22, 2026
- Licensed since
- 1995
- Phone
- (925) 998-0735
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| G N Henley Inc. | #373161 | On file | 1979 |
| Majestic Landscape | #373538 | On file | 1979 |
| Golden Oak Construction | #472526 | On file | 1985 |
| Ken Mitolo Construction | #531028 | On file | 1988 |
| Anderson Construction | #622558 | On file | 1991 |
| Fjellbo & Son Construction Inc. | #660977 | On file | 1992 |
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, 72 of them registered in Clayton. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Clayton license has been held 22 years, and the longest-standing one dates to 1976. 30 of Clayton's 72 licenses (41.7%) 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 Clayton: common questions
How many licensed general contractors are there in Clayton?
72 active B general building contractor licenses are registered in Clayton, out of 3,193 across Contra Costa County. 72 Clayton-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. 72 active B general building contractor licenses are registered in Clayton 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 30 of Clayton's 72 currently carry. 284 Contra Costa County licenses expire within 90 days.
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