| Abc Swimming Pool Products | Abc Swimming Pool Products | abcswimmingpoolproducts@gmail.com | (562) 430 8515 | Electricians | Los Alamitos · Orange County | — | — |
| Abcon Incorporated | Anthony Pasko Brajevic | — | (714) 323 3455 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Abdellatif Enterprises INC | Hazem Mahmoud Abdellatif | — | (949) 215 4790 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Abdolreza Construction | Ahleboob Abdolreza | — | (949) 295 5769 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Abed Flooring Co | Jan Jerard Szeneri | — | (714) 839 7171 | Other | Huntington Beach · Orange County | — | — |
| Abed Technologies | Abed Technologies | — | (714) 747 9005 | Electricians | Anaheim Hills · Orange County | — | — |
| Abel Construction & Roofing INC | Yea Sook Jang | — | (213) 500 7362 | Other roofers | Fullerton · Orange County | — | — |
| Abg Construction & Restoration | Mike Mihai Antimie | — | (714) 780 1700 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Abk Incorporated | Alvaro Jesus Basilio Gonzalez | — | (714) 421 6833 | Other roofers | Garden Grove · Orange County | — | — |
| Able Rain Gutter | Peter Ronald Zotovich | — | (949) 675 8432 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Abm Electrical & Lighting Solutions INC | Francisco Jose Santizo | — | (949) 888 2340 | Electricians | Tustin · Orange County | — | — |
| Abm Electrical Services LLC | Anthony Brown Medina | — | (714) 720 0661 | Electricians | Stanton · Orange County | — | — |
| Abode Landscaping INC | Felipe De Jesus Soto Vizcarra | — | (714) 507 5943 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| Above All Construction Co | Manuel Enrique Guzman | — | (714) 269 5943 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Above And Beyond Insulation | Gilbert Ryan Misael Madrid | — | (714) 409 7730 | Other | Anaheim · Orange County | — | — |
| Above It All Roofing INC | Terry Michael Allen | — | (714) 731 3911 | Other roofers | Irvine · Orange County | — | — |
| Abraham Bogdan Construction | Abraham Bogdan | — | (714) 724 3506 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Absolute Air Group LLC | Victor Paul Brian Rancour | — | (714) 942 5269 | HVAC | Westminster · Orange County | — | — |
| Absolute Building Contractors | Joshua Robert Schultz | — | (714) 337 2297 | GC, remodel, ADU | San Clemente · Orange County | — | — |
| Absolute Christmas Lights | Nicholas Henry Curtis | — | (714) 467 5483 | Electricians | Santa Ana · Orange County | — | — |
| Absolute Comfort Heating & Air Conditioning | Morales Marc | — | (949) 449 2361 | HVAC | Costa Mesa · Orange County | — | — |
| Absolute Locksmith INC | Meir Benny Hashalom | — | (949) 428 5625 | Other | Laguna Niguel · Orange County | — | — |
| Absolute Pool Care | Kevin Tyler Mccarthy | — | (949) 836 5620 | Pool | Santa Ana · Orange County | — | — |
| Absolute Sign INC | Gregory Steven Benedict | — | (562) 592 5838 | Other | Los Alamitos · Orange County | — | — |
| Abtech Incorporated | James Robin Herr | — | (714) 550 9961 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Abundant Plumbing | Abundant Plumbing | — | (714) 515 2732 | Other | Buena Park · Orange County | — | — |
| AC & Son Tree Service | Jesus Cortes | — | (714) 999 7047 | Tree | Anaheim · Orange County | — | — |
| AC All Star | Daniel Y Palacios | — | (714) 410 1880 | HVAC | Anaheim · Orange County | — | — |
| AC Cabling INC | Suzanne Aubert Wenger | — | (949) 466 0763 | Other | Costa Mesa · Orange County | — | — |
| AC Construction | Corona Abraham | — | (714) 612 5389 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| AC Discount | AC Discount | — | (714) 528 2075 | HVAC | Anaheim · Orange County | — | — |
| AC Xperts INC | Matthew William De Angelis | — | (949) 521 3226 | HVAC | Trabuco Canyon · Orange County | — | — |
| Academy Electric INC | Diane Rhea Gentry | — | (714) 289 9143 | Electricians | Orange · Orange County | — | — |
| Academy Locksmith LP | Timothy Francis Braun | — | (714) 701 1300 | Other | Anaheim · Orange County | — | — |
| Academy Mechanical INC | Lance Richard Whitney | — | (714) 955 9170 | Other | Laguna Woods · Orange County | — | — |
| Acadia | Chester Karin Valdovinos | — | (714) 921 4060 | Other | Orange · Orange County | — | — |
| Acar Construction INC | Tufan Acar | — | (949) 516 1310 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Acc & Engineering LLC | Adel F Ibrahim | — | (714) 844 2140 | HVAC | Anaheim · Orange County | — | — |
| Acc Construction INC | Jeffrey Alan Kindness | — | (714) 620 2343 | Electricians | Cypress · Orange County | — | — |
| Accelerated Restoration | Anthony Douglas Gonzales | — | (949) 257 8012 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |