| Insight Traffic Control Specialist INC | Matthew James Vogel | — | (760) 455 2048 | Other | Imperial · Imperial County | — | — |
| Ion Energy | Ion Energy | — | (760) 234 8432 | Electricians | Imperial · Imperial County | — | — |
| Island Pools Inc. | Island Pools Inc. | — | (909) 627-7665 | Pool | Chino · Imperial County | — | — |
| Iv Delta Tech LLC | Jesus Adriann Vega Pulido | — | (760) 886 3306 | HVAC | Holtville · Imperial County | — | — |
| Iv Flooring INC | Miramontes Elias | — | (760) 562 7179 | Other | Imperial · Imperial County | — | — |
| J & A Plumbing L L C | Carlos Jonathan Angulo | — | (760) 679 7379 | Other | Imperial · Imperial County | — | — |
| J & M Energy Solutions | Manuel Alberto Gerardo Serna | — | (480) 689 1820 | Electricians | Calexico · Imperial County | — | — |
| J & S Air Conditioning | J & S Air Conditioning | — | (760) 357 2222 | HVAC | Calexico · Imperial County | — | — |
| J A C Logix Electrical & Controls LLC | Juan Carlos Rodriguez | — | (442) 456 8020 | Electricians | Brawley · Imperial County | — | — |
| J A Carpentry | J A Carpentry | — | (760) 483 0065 | Other | Brawley · Imperial County | — | — |
| J A Sanders Contractor INC | James Allen Jr Sanders | — | (760) 353 5440 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| J B Industries | J B Industries | — | (818) 355 1409 | GC, remodel, ADU | Palos Verdes · Imperial County | — | — |
| J Bailon Construction INC | Bailon Gabriel | — | (760) 455 2192 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| J D Garage Door Installers | J D Garage Door Installers | — | (760) 356 5133 | GC, remodel, ADU | Holtville · Imperial County | — | — |
| J P Construction | John Alex Jr Parra | — | (760) 457 7812 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| J S Floor Covering INC | Jose Ismael Saldana | — | (760) 352 0537 | Other | El Centro · Imperial County | — | — |
| J Tapia Construction | Josue Alfredo Tapia | — | (760) 460 6547 | GC, remodel, ADU | Brawley · Imperial County | — | — |
| Jacob's Air Conditioning | Jacob's Air Conditioning | — | (760) 457 8566 | HVAC | Imperial · Imperial County | — | — |
| Jade Security Systems | Derald Jack Jr Houchin | — | (760) 344 2200 | Electricians | Brawley · Imperial County | — | — |
| James Houston INC DBA Roto - Rooter | James Le Roy Houston | — | (760) 352 6789 | Other | El Centro · Imperial County | — | — |
| Jax General Engineering INC | Carlos Andrey Villarino Renteria | — | (760) 442 3827 | Other | El Centro · Imperial County | — | — |
| Jesse's Plumbing | Jesse's Plumbing | info@jessesplumbing.com | (760) 675 7409 | Other | El Centro · Imperial County | — | — |
| Jim Nelson Construction INC | Jim Nelson | — | (760) 427 4274 | Other | Holtville · Imperial County | — | — |
| Jim Reiter's Locksmith & Safe INC | Sherman Wayne Goodwin | — | (760) 352 1385 | Other | El Centro · Imperial County | — | — |
| Joey Boots Builders | Luis Manuel Casillas | joeybootsbuilders@gmail.com | (760) 595 8933 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Johnny L Nigos Electric | Johnny Leo Nigos | — | (760) 554 4117 | Electricians | El Centro · Imperial County | — | — |
| Jones Bros Glass Co | David Lee Weaver | — | (760) 352 6428 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Jose Luis Gaeta | Jose Luis Gaeta | — | (818) 723 8846 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Jp3 Restoration | Jp3 Restoration | admin@jp3restoration.com | (760) 592 4074 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Jv Air Conditioning | Jv Air Conditioning | — | (760) 886 3306 | HVAC | Holtville · Imperial County | — | — |
| Jvl Design & Construction Corp | Contreras Salvador Serrano | — | (760) 483 1268 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Jvr Electrician | Jaime Vasquez | jvrelectrician5@gmail.com | (760) 886 1378 | Electricians | El Centro · Imperial County | — | — |
| K D Mansfield Construction | Kenneth Dexter Mansfield | — | (760) 801 4301 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| K V S Construction | Victor Samir Khalil | — | (310) 849 0215 | GC, remodel, ADU | Palos Verdes · Imperial County | — | — |
| Kairos Construction INC | Jesus Alfredo Antonio | joe.southon@kairos-construction.com | (760) 562 4109 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Konstra | Martin Alejandro Paniagua | — | (760) 886 0444 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| L B Drywall INC | Guillermo Lugo | — | (760) 595 3388 | Other | Imperial · Imperial County | — | — |
| Ladybug Landscape | Ladybug Landscape | — | (760) 996 9950 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Laguna Construction Incorporated | Laguna Jorge | — | (760) 604 8803 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Lalo's Concrete INC | Edward Adbi Marquez | — | (760) 847 7598 | Other | Imperial · Imperial County | — | — |