| Autumn Air INC | Craig Allen Andersen | micah@micahrich.com | (714) 744 4432 | HVAC | Orange · Orange County | — | — |
| Av Construction | Andy Khuca Vong | — | (626) 831 1831 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Av Pro Builder INC | Nam Van Bui | — | (714) 893 6919 | Electricians | Westminster · Orange County | — | — |
| Av Specialty Plumbing | Av Specialty Plumbing | — | (714) 574 5501 | Other | Santa Ana · Orange County | — | — |
| Ava Media INC | Eric Lawrence Magana | — | (408) 963 1432 | Other | Newport Beach · Orange County | — | — |
| Avali LLC | Alireza Ekhlas | — | (949) 775 8611 | Other | Irvine · Orange County | — | — |
| Avalon Fire Protection | Ryan Edward Parise | — | (714) 238 9285 | Electricians | Anaheim · Orange County | — | — |
| Avalon Painting | Avalon Painting | — | (714) 376 4416 | Windows, patio, painters | Seal Beach · Orange County | — | — |
| Avalon Studio Design Build Corp | Ovadia Avnaim | info@avalonstudiodesignbuild.com | (714) 642 2000 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Avana Ifm | Andre Farzin Afshar | — | (949) 876 1231 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Avanesian Mechanical Services INC | Babrouri Alen Avanes | — | (209) 252 6718 | HVAC | Irvine · Orange County | — | — |
| Avanti Construction Company INC | Roman William Zaccuri | — | (949) 350 0045 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Avanti Design Build | Lisa Basso Rossi | — | (949) 478 6994 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Avas INC | Noe Andrade | — | (419) 360 5567 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Avatar Green Builders INC | Matthew Ryan Brown | — | (619) 933 2409 | GC, remodel, ADU | Aliso Viejo · Orange County | — | — |
| Avatar Property Services INC | Linda Patrica Mitton | — | (909) 208 9922 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Avatec Construction Company INC DBA Avatec Company | Dennis Thomas Mc Gaughey | — | (949) 235 9082 | Other | Foothill Ranch · Orange County | — | — |
| Avaunt Garage Doors INC | Justin Jacob Muro | — | (949) 302 8181 | Other | Lake Forest · Orange County | — | — |
| Average Joe's Plumbing & Rooter INC | Joseph Stanly Gilreath | — | (949) 282 7771 | Other | Placentia · Orange County | — | — |
| Avi's Electric Co | Rodarte Lino | — | (657) 263 7714 | Electricians | Orange · Orange County | — | — |
| Avie Plumbing LLC | Morales Ivan Cambray | — | (714) 422 6060 | Other | Santa Ana · Orange County | — | — |
| Aviel LLC | Trevor Connor Gray | — | (949) 401 3123 | Other | Mission Viejo · Orange County | — | — |
| Avier Electrical | Javier Alcocer Andrade | j@avierelectrical.com | (714) 839 3961 | Electricians | Santa Ana · Orange County | — | — |
| Avila Premier Coatings INC | Jimenez Rogelio Avila | — | (714) 492 0043 | Windows, patio, painters | Anaheim · Orange County | — | — |
| Avila's Paint & Finishing | Avila's Paint & Finishing | — | (949) 338 4672 | Windows, patio, painters | Tustin · Orange County | — | — |
| Avis Dwellings | Tom Hoa Nguyen | — | (714) 890 2687 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Avorino | Kasper Raja Vianna | construction@avorino.com | (714) 900 3676 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Award Construction Management INC | Li Tongyue | — | (714) 757 5934 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Awerkamp Construction | Jon Stuart Awerkamp | — | (714) 322 0952 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Awesome Blinds & Shutters INC | Carol Ann Carmona | — | (714) 863 9987 | Other | Yorba Linda · Orange County | — | — |
| Awesome Rain Gutters | Awesome Rain Gutters | — | (714) 757 0574 | GC, remodel, ADU | Cypress · Orange County | — | — |
| Awn Q Electrical Services | Randy Lee Quillman | — | (949) 547 8612 | Electricians | San Clemente · Orange County | — | — |
| Awnings By Russ | Awnings By Russ | — | (714) 525 7877 | Other | Fullerton · Orange County | — | — |
| Awp Safety | Steven Edward Vogel | — | (330) 677 7401 | Other | Santa Ana · Orange County | — | — |
| Awt Construction | Adam William Tomlinson | — | (562) 235 3285 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Ax Flooring | Ax Flooring | — | (949) 294 3608 | Other | Orange · Orange County | — | — |
| Ax Plumbing INC | Robert Francis Delang | — | (657) 244 8405 | Other | Huntington Beach · Orange County | — | — |
| Axb Electrical | Andris Xavier Barkley | — | (951) 473 7390 | Electricians | San Clemente · Orange County | — | — |
| Axcess Plumbing Services | Aaron Bahena | — | (714) 696 4167 | Other | Buena Park · Orange County | — | — |
| Axcess Video Corporation | Theresa French Robbins | — | (949) 635 6868 | Other | Trabuco Canyon · Orange County | — | — |