| Allied Industrial Systems INC | Michael Allan Mc Donald | — | (714) 630 4540 | Electricians | Anaheim · Orange County | — | — |
| Allied Pacific Construction | Timothy John Underwood | — | (949) 374 4464 | GC, remodel, ADU | Capistrano Beach · Orange County | — | — |
| Allied Paving Company | Jeter Brandon | — | (714) 632 7484 | Other | Garden Grove · Orange County | — | — |
| Allied Plus Low Voltage | Babarinde Christof Eko | — | (714) 446 0635 | Other | La Habra · Orange County | — | — |
| Allied Roof Systems INC | Karen Lee Ewart | — | (855) 994 2426 | Other roofers | Costa Mesa · Orange County | — | — |
| Allied Sprinkler Company INC | Roger Leonard Eickhoff | — | (949) 292 2714 | Windows, patio, painters | Anaheim · Orange County | — | — |
| Allies Ornamental Iron Works | Ramirez Alejandro Gomez | — | (949) 205 9486 | Other | Villa Park · Orange County | — | — |
| Allinone Construction INC | Chang Hwan Lee | — | (714) 889 9745 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Allison Electric | Brian Thomas Allison | interested@domainmarket.com | (949) 887 7672 | Electricians | Fountain Valley · Orange County | — | — |
| Allkimi | Jeonghun Kim | allkimiconstruction@gmail.com | (213) 507 6849 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Allpro Construction Services And Restoration | Robert Anthony Sanchez | — | (714) 747 7544 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Allpro Home Solutions | Hector Rodriguez | — | (714) 494 3824 | GC, remodel, ADU | Brea · Orange County | — | — |
| Allpro Mechanical Contractor INC | Sung Il Lim | — | (714) 504 7683 | HVAC | La Habra · Orange County | — | — |
| Allred's Corporation | Daniel William Allred | allreds@allreds.net | (385) 243 4033 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Allright Electrical Services INC | James Edward Milhoan | — | (949) 233 6962 | Electricians | Lake Forest · Orange County | — | — |
| Allscape | Martin Franz Birrer | — | (714) 894 0332 | Windows, patio, painters | Westminster · Orange County | — | — |
| Allsmile Construction | Lee Gil Jae | allsmileconstruction@gmail.com | (714) 904 8237 | GC, remodel, ADU | Los Alamitos · Orange County | — | — |
| Allstar Electric | Dustyn Micheal Moser | — | (714) 222 1322 | Electricians | Anaheim · Orange County | — | — |
| Allstar Paving Company INC | Joseph Victor Albano | — | (714) 835 9177 | Other | Santa Ana · Orange County | — | — |
| Allstar Tinting | Allstar Tinting | — | (949) 366 0193 | Other | San Clemente · Orange County | — | — |
| Alltones Painting | Alltones Painting | — | (707) 889 7002 | Windows, patio, painters | Laguna Niguel · Orange County | — | — |
| Alltrade Construction Services | Richard Dean Winder | — | (949) 584 5565 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Allure Pest Management | Allure Pest Management | — | (949) 342-0662 | Pest, tile roofs | Rancho Santa Margarita · Orange County | — | — |
| Allusions Glass & Mirror INC | Brian Hedley Butler | — | (949) 492 1813 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| Allusions Glazing | Mendoza-lopez David | — | (949) 492 1813 | Windows, patio, painters | San Clemente · Orange County | — | — |
| Ally Construction Services LLC | Alex Jason Wright | — | (714) 654 3336 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Almejo Air Service | Almejo Fernando | — | (949) 310 9776 | HVAC | Rancho Santa Margarita · Orange County | — | — |
| Almex Usa INC | Ravindra Vithal Tilak | — | (714) 739 0303 | Other | Buena Park · Orange County | — | — |
| Almquist Mobile Home Service | John Werner Almquist | — | (714) 891 9798 | Other | Huntington Beach · Orange County | — | — |
| Aloha Fab & Dockworks INC | Theodore Soares | — | (714) 630 6061 | Other | Anaheim · Orange County | — | — |
| Aloha Handyman LLC | Justin Michael Jenkins | impallari@gmail.com | (650) 398 7179 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Aloha Pavers | Thomas Joseph Callahan | — | (888) 880 9997 | Other | Huntington Beach · Orange County | — | — |
| Aloha Pool & Design INC | Mark Thomas Klingsporn | — | (951) 453 9728 | Pool | Corona Del Mar · Orange County | — | — |
| Aloha Property Development | Aloha Property Development | — | (949) 842 1960 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Aloha Vinyl | Aloha Vinyl | — | (714) 254 7792 | Other | Costa Mesa · Orange County | — | — |
| Alonco Construction INC | Lonny Wayne Davis | — | (818) 321 3598 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Alongi Construction & Design | Alongi Joseph | — | (714) 809 3350 | GC, remodel, ADU | Atwood · Orange County | — | — |
| Alonzo Avalos | Alonzo Avalos | — | (714) 726 2216 | Electricians | Westminster · Orange County | — | — |
| Alonzo Roofing Co | Omar Alonzo | — | (714) 727 9895 | Other roofers | Santa Ana · Orange County | — | — |
| Alph Drywall Co | Garcia Alfonso Cayetano | — | (949) 607 7318 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |