| A S General Construction | Andres Jr Saenz | abimaelsandoval1992@gmail.com | (760) 396 6263 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| A S H Building Solutions | A S H Building Solutions | — | (209) 200 6406 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| A S I Alarms | Robert Louis Mundo | info@asialarms.com | (800) 408 4338 | Electricians | Concord · Contra Costa County | — | — |
| A S I Builders INC | Alan James Svilik | — | (818) 839 5695 | GC, remodel, ADU | Sherman Oaks · Los Angeles County | — | — |
| A S I Electric INC | Nathalie Rachel Naor | — | (818) 285 8513 | Electricians | Northridge · Los Angeles County | — | — |
| A S I INC | Tracy Marie Nail | — | (661) 327 2900 | Other | Bakersfield · Kern County | — | — |
| A S I Landscape Services INC | Israel Soriano | — | (714) 638 0696 | Windows, patio, painters | Garden Grove · Orange County | — | — |
| A S I Networks INC | Jeff David Plumley | — | (909) 869 6160 | Other | San Dimas · Los Angeles County | — | — |
| A S I Systems INC | Jason Aaron Jones | — | (888) 944 7274 | Electricians | Martinez · Contra Costa County | — | — |
| A S K Construction | Sayadyan Karo | — | (818) 268 9000 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| A S K Construction INC | Adam Spencer Kittredge | — | (925) 848 4993 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| A S L Construction INC | Daniel Lawrence Potter | — | (951) 940 0123 | GC, remodel, ADU | Corona · Riverside County | — | — |
| A S Landscaping Maintenance | A S Landscaping Maintenance | — | (925) 370 8356 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| A S Legacy Construction INC | Jose Abel Sepulveda Leon | — | (951) 823 3294 | GC, remodel, ADU | Perris · Riverside County | — | — |
| A S M Flooring LLC | Amezcua-rodriguez Edmundo | — | (408) 469 0261 | Other | Campbell · Santa Clara County | — | — |
| A S M Painting INC | Velazquez Emma | estimating@asmpainting.com | (760) 625 7168 | Windows, patio, painters | Indio · Riverside County | — | — |
| A S P Construction & Development | Saffarpour Arash | — | (800) 900 9201 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| A S P Plumbing | A S P Plumbing | — | (650) 703 2006 | Other | Livermore · Alameda County | — | — |
| A S Plastering | A S Plastering | — | (323) 899 0947 | Other | Huntington Park · Los Angeles County | — | — |
| A S Plastering | A S Plastering | — | (951) 318 7796 | Other | Moreno Valley · Riverside County | — | — |
| A S Plumbing | A S Plumbing | — | (818) 266 4471 | Other | Tarzana · Los Angeles County | — | — |
| A S Pool And Spa Maintenance | Andres Gutierrez Vega | — | (669) 639 0319 | Pool | Soquel · Santa Cruz County | — | — |
| A S Remodeling Construction | Sanchez Chavez Alfredo | — | (510) 860 9470 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| A S Seamless Gutters | A S Seamless Gutters | — | (209) 631 1458 | Other | Atwater · Merced County | — | — |
| A S Steel | A S Steel | — | (559) 397 1479 | Other | Fresno · Fresno County | — | — |
| A S T Advanced Service Technology INC | Frank Fay Fahey | — | (909) 966 9080 | Other | Colton · San Bernardino County | — | — |
| A S T Electric | Ali Asghar Tourkaman | — | (760) 250 9755 | Electricians | Rancho Mirage · Riverside County | — | — |
| A S T Installations | A S T Installations | — | (415) 424 8094 | Other | Oakley · Contra Costa County | — | — |
| A S T Scaffolding | Jorge Miguel Avila | — | (669) 237 5456 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| A S T Sheet Metal And Gutters | Arthur Shane Tooker | — | (831) 601 0948 | HVAC | Seaside · Monterey County | — | — |
| A S T Stone Corporation | Martin Moisi Daszkal | — | (760) 398 4300 | Other | Coachella · Riverside County | — | — |
| A S Tech Communication INC | Adolfo Iii Rivas | bndguy70@gmail.com | (559) 776 1489 | Other | Friant · Fresno County | — | — |
| A S Timpano Construction | Alfonso Salvitore Timpano | — | (760) 977 1622 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| A S Wise INC | Sabga Anthony | — | (714) 891 1501 | Other | Huntington Beach · Orange County | — | — |
| A Sabillon Construction | Hernandez Adolfo | — | (323) 533 3012 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A Same Day Testing Co | April Day Hoyle | — | (805) 639 0080 | Other | Camarillo · Ventura County | — | — |
| A San Diego Painting INC | Arriaga-lopez Heriberto | — | (619) 789 3301 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A Sanchez Construction | Sanchez Antonio | — | (559) 560 8922 | GC, remodel, ADU | Terra Bella · Tulare County | — | — |
| A Sanchez Mechanical | A Sanchez Mechanical | — | (877) 359 1758 | HVAC | Fremont · Alameda County | — | — |
| A Sandoval Tree Service INC | Alfredo Junior Sandoval | — | (818) 455 3368 | Tree | Arleta · Los Angeles County | — | — |