Best Licensed General Contractors in Diablo, CA
6 general contractors registered in Diablo hold current CSLB licenses, verified against official records as of August 22, 2026. All 6 are listed below, ordered by workers' compensation cover and years licensed.
- 3,193 active B general building contractor licenses in Contra Costa County; 6 registered in Diablo
- 2 of Diablo's 6 licenses (33.3%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Diablo: 13 years
- Longest Diablo licensure: since 1989
- 284 county licenses reach their expiration date within 90 days
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- Verified
- August 22, 2026
- Licensed since
- 1989
- Phone
- (925) 570-5227
- Verified
- August 22, 2026
- Licensed since
- 2025
- Phone
- (925) 553-6653
- Verified
- August 22, 2026
- Licensed since
- 2003
- Phone
- (925) 837-2828
- Verified
- August 22, 2026
- Licensed since
- 2005
- Phone
- (925) 250-2777
- Verified
- August 22, 2026
- Licensed since
- 2013
- Phone
- (925) 382-1219
- Verified
- August 22, 2026
- Licensed since
- 2026
- Phone
- (925) 382-2048
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| J A Langon Builders Incorporated | #575571 | On file | 1989 |
| Rhodes Construction | #1138607 | On file | 2025 |
| P K N Development | #829213 | Exempt or none on file | 2003 |
| Tyren Construction | #860602 | Exempt or none on file | 2005 |
| Kt Builders | #980362 | Exempt or none on file | 2013 |
| Kt Home Development | #1154378 | Exempt or none on file | 2026 |
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, 6 of them registered in Diablo. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Diablo license has been held 13 years, and the longest-standing one dates to 1989. 2 of Diablo's 6 licenses (33.3%) 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 Diablo: common questions
How many licensed general contractors are there in Diablo?
6 active B general building contractor licenses are registered in Diablo, out of 3,193 across Contra Costa County. 6 Diablo-registered companies passed our license verification, and all 6 are listed on this page. 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. 6 active B general building contractor licenses are registered in Diablo and 3,193 across Contra Costa County, the longest-standing issued in 1989. 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 2 of Diablo's 6 currently carry. 284 Contra Costa County licenses expire within 90 days.