DIAMOND PETROLEUM SERVICES INC
General Engineering Contractor license 1005444 issued by the California Contractors State License Board. Status shown as of August 17, 2026.
This license is active. It is valid through August 31, 2027, 379 days from today, according to the most recent CSLB public file.
| License holder | DIAMOND PETROLEUM SERVICES INC |
|---|---|
| Business name | DIAMOND PETROLEUM SERVICES INC |
| License type | General Engineering Contractor |
| License number | 1005444 |
| Status today | Active |
| Expiration date | August 31, 2027 |
| City | Antioch |
| County of record | Contra Costa |
| Phone on file | (925) 470 0803 |
| Classifications | A, D40 |
| Board status | CLEAR |
| Contractor bond | $25,000 |
| Issuing authority | California Contractors State License Board |
| First seen in public file | August 17, 2026 |
| Last confirmed | August 17, 2026 |
How to confirm this yourself
This page reproduces the CSLB public license file, which the agency republishes daily. Before you hire anyone, confirm the record at the source and ask the contractor for proof of insurance separately, since licensing and insurance are not the same thing and the state file does not cover insurance.
Verify at CSLB → File a complaint
There are 259 licensed general engineering contractors on record in Contra Costa County. Compare them all →