Registered contractors in Concord, CA
17 active contractor registrations in Concord, CA, in the L&I files of October 2, 2026.
| Contractor | License | Specialty | Expires |
|---|---|---|---|
| AGGREGATE ENGINEERING INC | AGGREEI792O1 | General | Sep 10, 2027 |
| BAY ALARM COMPANY | BAYALAC876KF | Limited energy | May 3, 2027 |
| BAY ALARM COMPANY | BAYALAC878KH | General | May 17, 2027 |
| CONCO CEMENT COMPANY | CONCOCC044LS | General | Jun 10, 2027 |
| CONCO PUMPING INC | CONCOPI044LS | General | Jun 10, 2027 |
| CONCO STORAGE LLC | CONCOSL800RJ | General | Jan 4, 2027 |
| CORNERSTONE ENVIR CONTRS INC | CORNEEC767J5 | General | Jul 11, 2028 |
| DIABLO TELECOM & CONST INC | DIABLTC750CQ | General | Feb 18, 2027 |
| IRONWOOD COMMERCL BLDRS INC | IRONWCB764CB | General | Feb 6, 2028 |
| LIGHTRIVER TECHNOLOGIES, INC. | LIGHTTI798CP | Electrical contractor | Feb 19, 2028 |
| PSR WEST COAST BUILDERS INC | PSRWEWC911LK | General | Feb 5, 2028 |
| SAK BUILDERS INC | SAKBUBI819LP | General | Jun 10, 2027 |
| SWINERTON BUILDERS | SWINEB*992DR | General | Jan 11, 2027 |
| SWINERTON ENERGY INC | SWINEEI763C8 | General | Apr 2, 2028 |
| TAP MASTER INC | TAPMAMI835DT | General | Mar 31, 2027 |
| TIMBERLAB INC | TIMBEI*793KE | General | Apr 15, 2027 |
| UCI CONSTRUCTION INC | UCICOCI911J1 | General | Jan 12, 2028 |
Alphabetical order — this site ranks no one. Active company registrations in the L&I contractor files of October 2, 2026. Contractors registered as individuals are not on this site. How to read this.