ROBERT L DIAS DBA RD'S SERVICE CONTRACTOR
Plumbing Contractor license 523223 issued by the California Contractors State License Board. Status shown as of August 17, 2026.
This license is active. It is valid through January 31, 2028, 532 days from today, according to the most recent CSLB public file.
| License holder | ROBERT L DIAS DBA RD'S SERVICE CONTRACTOR |
|---|---|
| Business name | ROBERT L DIAS DBA RD'S SERVICE CONTRACTOR |
| License type | Plumbing Contractor |
| License number | 523223 |
| Status today | Active |
| Expiration date | January 31, 2028 |
| City | Concord |
| County of record | Contra Costa |
| Phone on file | (925) 680 1161 |
| Classifications | C20, C29, C36 |
| 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 375 licensed plumbing contractors on record in Contra Costa County. Compare them all →