| A J S Electric | Adolfo Joe Sanchez | contact@claycoelectric.org | (619) 405 3508 | Electricians | San Diego · San Diego County | — | — |
| A J S Landscaping | A J S Landscaping | aj@ajslandscaping.com | (530) 639 2263 | Windows, patio, painters | Browns Valley · Yuba County | — | — |
| A J S Sprinkler Landscape INC | Steve Singleton Jr Loe | — | (916) 772 1785 | Other | Roseville · Placer County | — | — |
| A J Shower Pans | A J Shower Pans | — | (949) 306 5218 | Other | Riverside · Riverside County | — | — |
| A J Supreme Coatings | Adelaido Jr Rodriguez | — | (909) 501 8419 | Windows, patio, painters | Highland · San Bernardino County | — | — |
| A J Tile And Stone Works | Jaime Angel | — | (714) 615 8487 | Other | Orange · Orange County | — | — |
| A J V Heating & Cooling | Andrew James Verdugo | — | (209) 742 2085 | HVAC | Mariposa · Mariposa County | — | — |
| A J V Tile Marble & Granite | Verduzco Emiliano | — | (209) 681 1704 | Other | Modesto · Stanislaus County | — | — |
| A J Verar Construction | Jose Antonio Verar-garcia | — | (530) 250 5045 | GC, remodel, ADU | Biggs · Butte County | — | — |
| A J Zimmer Construction INC | Stephen Ed Zimmer | — | (951) 357 2118 | Other | Temecula · Riverside County | — | — |
| A J's Landscaping | A J's Landscaping | — | (310) 987 1424 | Windows, patio, painters | Carson · Los Angeles County | — | — |
| A J's Mobile Home Service | Alex John Slivkoff | — | (661) 204 6681 | Other | Bakersfield · Kern County | — | — |
| A J's Painting And Decorating | A J's Painting And Decorating | — | (415) 302 3414 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| A Jack Of All Trades | A Jack Of All Trades | — | (916) 768 2185 | GC, remodel, ADU | Meadow Vista · Placer County | — | — |
| A Jackson Contracting INC | Aric Leon Jackson | — | (805) 896 7556 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| A Jacques Plumbing & Drain | A Jacques Plumbing & Drain | — | (408) 442 0630 | Other | San Jose · Santa Clara County | — | — |
| A James Electric Services LLC | Ajay Heath James | — | (805) 712 8640 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| A Janiszewski Company DBA Exclusive HVAC | Patrick Alexander Janiszewski | — | (760) 246 5221 | HVAC | Hesperia · San Bernardino County | — | — |
| A Jf Drywall INC | Jorge A Fierro | — | (760) 802 2807 | Other | Vista · San Diego County | — | — |
| A Jie Construction INC | Wei Ying Huang | — | (925) 388 8828 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A Jordan Construction | Anthony Noel Jordan | — | (209) 728 0930 | GC, remodel, ADU | Avery · Calaveras County | — | — |
| A Juarez Construction | Antonio O Juarez | — | (707) 396 6685 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| A K & Associates | Agop Mesrop Kochkarian | — | (818) 653 8955 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A K A Electric INC | Kevin Dennis Kroner | — | (415) 898 9896 | Electricians | Novato · Marin County | — | — |
| A K A Plumbing | A K A Plumbing | — | (818) 434 8052 | Other | Glendale · Los Angeles County | — | — |
| A K Air Systems | A K Air Systems | — | (916) 504 6180 | HVAC | Sacramento · Sacramento County | — | — |
| A K B Builder | A K B Builder | — | (916) 519 2230 | GC, remodel, ADU | Elk Grove · Sacramento County | — | — |
| A K Best Construction INC | Peter Ki Nam | — | (213) 332 3346 | Electricians | Buena Park · Orange County | — | — |
| A K Builders | A K Builders | — | (951) 813 0030 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| A K C Construction | Antonio Curiel Castillo | — | (707) 338 4014 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| A K C Construction | Andre K Catellier | — | (916) 416 4628 | Other | Sacramento · Sacramento County | — | — |
| A K Commercial & Construction Cleaning | Rashidah Abdul-Khaliq | — | (619) 347 2434 | Other | San Diego · San Diego County | — | — |
| A K Construction | Avraham Mayer Kimhi | — | (818) 517 3935 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| A K Construction | Karapetians Armik | — | (818) 681 7572 | GC, remodel, ADU | Porter Ranch · Los Angeles County | — | — |
| A K Construction | Andre Victor Kaprielian | — | (650) 343 7335 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A K Construction | Andrew Andor Kolozsvari | — | (951) 845 9639 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| A K Construction | Alexandros Nikolaos Klimegos | — | (562) 208 5526 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| A K Construction Enterprises INC | Andy Matthew Kwitowski | — | (408) 465 2965 | GC, remodel, ADU | Morgan Hill · Santa Clara County | — | — |
| A K Developers INC | Aleksandr Jr Kovalev | — | (916) 267 9760 | GC, remodel, ADU | Folsom · Sacramento County | — | — |
| A K Electric | Alfred Reynold Klomp | — | (562) 402 9088 | Electricians | Hawaiian Gardens · Los Angeles County | — | — |