| Axe Property Management Inc. | Axe Property Management Inc. | — | (562) 600-3417 | Property managers | Irvine · Orange County | — | — |
| Axel's Painting Revolution INC | Job Axel Lopez Figueroa | — | (714) 585 7421 | Windows, patio, painters | Garden Grove · Orange County | — | — |
| Axeon Construction INC | Oleksandr Medvedskiy | — | (858) 220 9864 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |
| Axia Electric LLC | Brian Joseph Dotterer | — | (949) 333 1500 | Electricians | Irvine · Orange County | — | — |
| Axio Trades Construction | Aaron T Chan | — | (714) 725 9591 | GC, remodel, ADU | Westminster · Orange County | — | — |
| Axis Door And Hardware Services INC | Timothy Lawrence Cline | — | (714) 614 7306 | Other | Anaheim · Orange County | — | — |
| Axis Electrical Power INC | Douglas Bryan Mac Armour | — | (949) 992 3464 | Electricians | Irvine · Orange County | — | — |
| Axis Mechanical Services | Christopher Michael Purzycki | — | (714) 398 8322 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Axis Tile & Stone Worx INC | Yousuf Mohammed Ghandhi | — | (657) 522 2947 | Other | Anaheim · Orange County | — | — |
| Axl Glass & Hardware LLC | Gama Medina Guillermo | — | (657) 249 4041 | Windows, patio, painters | Santa Ana · Orange County | — | — |
| Axomcore LLC | Mohammad Khosravi | — | (949) 307 4389 | Other | Laguna Niguel · Orange County | — | — |
| Axtell's Custom Building | Axtell's Custom Building | — | (714) 296 4451 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Ay Electric | Alfredo Mateo Yax Baquiax | — | (714) 788 4773 | Electricians | Tustin · Orange County | — | — |
| Ayala Construction Corp | Pasqual Laurence Ayala | — | (505) 249 2121 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Ayala Engineering INC | Ricardo Martin Ayala | — | (714) 823 7179 | Other | Anaheim · Orange County | — | — |
| Ayala Kevin | Ayala Kevin | — | (714) 873 2276 | Other | Laguna Niguel · Orange County | — | — |
| Ayala's Granite & Marble INC | Porfirio Ayala | — | (714) 504 1075 | Other | Anaheim · Orange County | — | — |
| Ayersaire | Thomas Kim Ayers | — | (714) 791 7320 | HVAC | Anaheim · Orange County | — | — |
| Aymco Construction INC | Ortuno Luis | — | (714) 508 6623 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Ayres Construction Company | Chase Frank Ayres | — | (714) 540 6060 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Ayrsmith INC | Mina S Wahba | — | (714) 797 1760 | HVAC | Huntington Beach · Orange County | — | — |
| Ayzar INC | Mehdi Aynechi | — | (714) 662 5593 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Az Construction Group | Rigoberto Alarcon-Hernandez | — | (209) 370 4884 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Az Custom Design And Build | Oscar Harold Jr Almendarez | — | (951) 990 4834 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Az Green Remodeling Corp | Dennis Haruo Miyahira | azgreenremodeling@gmail.com | (720) 705 5432 | GC, remodel, ADU | Stanton · Orange County | — | — |
| Azad Golshani | Azad Golshani | — | (949) 568 5537 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Azizi Prestige Construction | Azizi Javid | — | (424) 440 0551 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Azlin K Zeballos G | Azlin K Zeballos G | — | (949) 872 3047 | Electricians | Tustin · Orange County | — | — |
| Aztec Supply | Brandon Darwin Berge | — | (714) 771 6580 | GC, remodel, ADU | Orange · Orange County | — | — |
| Azul Demolition Services | Castaneda Gonzalez Norberto | — | (714) 408 5414 | Other | Anaheim · Orange County | — | — |
| Azure-blue Construction INC | Moises Emiliano Cazares | — | (714) 588 9645 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Azury Landscaping INC | Ventura Eliseo Magana | — | (562) 968 9811 | Windows, patio, painters | La Habra · Orange County | — | — |
| B & A Contractors INC | Maria Teresa Sanchez | — | (562) 760 1832 | Other roofers | Fullerton · Orange County | — | — |
| B & B Construction | Bruce Harold Montgomery | — | (949) 375 4307 | GC, remodel, ADU | Orange · Orange County | — | — |
| B & B Contractors INC DBA The Bergman Companies | Daniel Lee Bergman | — | (909) 208 6997 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| B & B General Construction Services INC DBA B & B Emergency & Res | William Franklin Iii Carr | — | (714) 516 9667 | Other roofers | Anaheim · Orange County | — | — |
| B & B Plastering | John Batiste Jr Benoit | — | (714) 273 5010 | Other | Cypress · Orange County | — | — |
| B & B Plumbing INC | William Harold John | — | (714) 970 7977 | Other | Anaheim · Orange County | — | — |
| B & B Quality Paperhanging | Alan Joseph Belmonte | — | (714) 328 1550 | Other | Irvine · Orange County | — | — |
| B & C Awnings INC | Thy Kiem Pham | — | (714) 632 3303 | Other | Anaheim · Orange County | — | — |