| A J F Electric | Allan James Frattali | — | (805) 493 1363 | Electricians | Thousand Oaks · Ventura County | — | — |
| A J Fistes Corporation | Anastasios Jacob Fistes | — | (424) 536 3142 | GC, remodel, ADU | San Pedro · Los Angeles County | — | — |
| A J Flooring Installation | Alan Roy Jr Link | — | (559) 307 8858 | Other | Fresno · Fresno County | — | — |
| A J Foulkes Electric | Arthur Joseph Foulkes | — | (909) 498 6890 | Electricians | Fontana · San Bernardino County | — | — |
| A J Freid General Contractor | A J Freid General Contractor | — | (805) 807 5361 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| A J General Contractor | A J General Contractor | — | (714) 720 3988 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| A J General Engineering & Consulting | Jimenez Antonio | — | (562) 355 3598 | Electricians | Lakewood · Los Angeles County | — | — |
| A J Hand Construction | Aaron Jack Hand | — | (530) 275 9224 | GC, remodel, ADU | Redding · Shasta County | — | — |
| A J Heating & Air Conditioning | Abel Jr Arinaga | — | (714) 474 3056 | HVAC | San Bernardino · San Bernardino County | — | — |
| A J Heating & Cooling INC | Jose Garnica-Flores | — | (510) 489 2382 | HVAC | Union City · Alameda County | — | — |
| A J Holiday Construction INC | Adam Joshua Holiday | — | (949) 630 8991 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| A J Houston Construction | Alexander Jay Houston | — | (805) 534 4251 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| A J K Construction INC | Carlos Alberto Pena | — | (310) 502 7827 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A J Khair Construction INC | Demitri Samaha | — | (323) 822 2378 | GC, remodel, ADU | West Hollywood · Los Angeles County | — | — |
| A J Kirkwood & Associates INC | Leah Jean Zappia | — | (714) 505 1977 | Electricians | Fullerton · Orange County | — | — |
| A J M Construction Services | Anthony James Moisio | ajm4construction@aol.com | (909) 917 6679 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| A J M Construction Services INC | Roark Clancy Parks | — | (310) 713 0441 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| A J M Electrical | Jose Alberto Martinez | — | (805) 260 3191 | Electricians | Santa Maria · Santa Barbara County | — | — |
| A J M Engineering | A J M Engineering | — | (626) 926 0995 | Other | Brea · Orange County | — | — |
| A J M General Construction Company INC | Jose Alberto Merino | — | (818) 373 9567 | GC, remodel, ADU | Lakewood · Los Angeles County | — | — |
| A J Mersola | A J Mersola | — | (818) 266 4987 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| A J O Group Build INC | Giuseppe Sircana | — | (415) 758 2085 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| A J Overhead Doors | A J Overhead Doors | — | (818) 395 9696 | Other | La Puente · Los Angeles County | — | — |
| A J P Construction | Andrzej Jan Polniak | — | (619) 449 8170 | GC, remodel, ADU | Santee · San Diego County | — | — |
| A J Padelford & Son INC | Diane Ilene Young | — | (562) 924 3364 | GC, remodel, ADU | Artesia · Los Angeles County | — | — |
| A J Painting | A J Painting | — | (424) 427 9032 | Windows, patio, painters | Compton · Los Angeles County | — | — |
| A J Painting | A J Painting | — | (209) 587 6340 | Windows, patio, painters | Dos Palos · Merced County | — | — |
| A J Painting Co | Jara Alberto | — | (951) 370 5886 | Windows, patio, painters | Hemet · Riverside County | — | — |
| A J Peet Construction | Adam James Peet | — | (650) 302 2998 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| A J Peters Construction | Anthony James Peters | — | (805) 459 8064 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| A J Plescia Plumbing | A J Plescia Plumbing | — | (916) 384 6200 | Other | Sacramento · Sacramento County | — | — |
| A J Power Solutions INC | Young Chul Kim | hyd@ajpowersolutions.com | (213) 792 5444 | Electricians | Los Angeles · Los Angeles County | — | — |
| A J Precision Concrete INC | Norma Rosario Gijon | — | (805) 569 2929 | Other | Santa Barbara · Santa Barbara County | — | — |
| A J R Construction | Antonio Jesus Rosales Lopez | — | (209) 203 9584 | GC, remodel, ADU | Merced · Merced County | — | — |
| A J Raingutters | A J Raingutters | — | (818) 568 3434 | Other | Pasadena · Los Angeles County | — | — |
| A J Rankin Construction | Albert James Rankin | — | (925) 206 8303 | GC, remodel, ADU | Trinity Center · Trinity County | — | — |
| A J Roofing And Infrared Inspection INC | Remigiusz Przemyslaw Czarnecki | — | (818) 362 3199 | Other roofers | Sun Valley · Los Angeles County | — | — |
| A J Russo Construction | Andrew John Russo | — | (831) 224 9988 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| A J S Construction | Steven John Srour | — | (818) 642 9700 | GC, remodel, ADU | Toluca Lake · Los Angeles County | — | — |
| A J S Electric | Palomino David | — | (818) 966 2300 | Electricians | Sylmar · Los Angeles County | — | — |