| A F J Electric | Alfred Gongora Jr Fernandez | — | (562) 225 8582 | Electricians | Long Beach · Los Angeles County | — | — |
| A F M Construction | Larry William Roberts | — | (858) 922 7288 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| A F M Services INC | Michael Edward Martinez | — | (209) 604 6027 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| A F P Sprinklers INC | Kenneth Edward Gonzalez | — | (530) 605 4760 | Other | Redding · Shasta County | — | — |
| A F R Masonry | A F R Masonry | — | (626) 705 5868 | GC, remodel, ADU | South El Monte · Los Angeles County | — | — |
| A F Rack Installations | Alfonso Cordoba Carbajal | — | (909) 556 9844 | Other | La Mirada · Los Angeles County | — | — |
| A F S A Construction Company | Farzan Ali | — | (408) 913 3226 | HVAC | San Jose · Santa Clara County | — | — |
| A F S Engineering | A F S Engineering | afs@alhq.com.my | (530) 913 9351 | Other | Grass Valley · Nevada County | — | — |
| A F S Garage Door Co | Jose Navarro Soto | — | (951) 237 1718 | Other | Moreno Valley · Riverside County | — | — |
| A F T Construction Services | Anthony Frank Taranto | — | (562) 500 1185 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| A F V Construction | Alexis Fermo Velacruz | — | (408) 640 1665 | GC, remodel, ADU | Folsom · Sacramento County | — | — |
| A Fedair | A Fedair | afedair@gmail.com | (408) 607 0005 | HVAC | Morgan Hill · Santa Clara County | — | — |
| A Fiddler On The Roof Duct & Chimney Service | Russell George Gardner | — | (818) 988 9034 | HVAC | Van Nuys · Los Angeles County | — | — |
| A Finished Home INC | Brian Patrick Kozera | brian@afinishedhome.com | (925) 915 0896 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| A Finishing Touch | A Finishing Touch | — | (626) 523 1512 | GC, remodel, ADU | West Covina · Los Angeles County | — | — |
| A First Electric Service | Manuel Pablo Morales | — | (323) 493 7508 | Electricians | Carson · Los Angeles County | — | — |
| A First Klass Plumbing INC | Francisco Rojas Munoz | — | (714) 430 7592 | Other | Moreno Valley · Riverside County | — | — |
| A Five Star Heating & Cooling | Sanders Mark | — | (916) 716 8942 | HVAC | Sacramento · Sacramento County | — | — |
| A Fix Construction | Darren Patrick Fix | — | (707) 228 0785 | Other | Novato · Marin County | — | — |
| A Flores Excavating & Grading INC | Albert Flores | — | (760) 360 0255 | Other | La Quinta · Riverside County | — | — |
| A Flow Rain Gutters | A Flow Rain Gutters | — | (714) 960 1207 | Other | Huntington Beach · Orange County | — | — |
| A Floyd Construction | Andrew Alton Floyd | — | (916) 276 3235 | GC, remodel, ADU | Folsom · Sacramento County | — | — |
| A Frame Builders LLC | Andre Duane Del Valle | — | (530) 693 1236 | GC, remodel, ADU | Meadow Vista · Placer County | — | — |
| A Frame Building Group INC | Kyle Austin Withnell | info@aframebuildinggroup.com | (949) 503 1802 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| A Frame Construction | Mason Benton Lessard | — | (707) 480 0740 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| A Frame Construction Company INC | David John Konezny | — | (619) 886 6778 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| A Frame Electric INC | Joshua James Long | — | (619) 805 5088 | Electricians | San Diego · San Diego County | — | — |
| A Freeman Construction LLC | Austin Grant Freeman | — | (916) 215 1218 | GC, remodel, ADU | Carmichael · Sacramento County | — | — |
| A Fresh Breeze - Mobile Window And Door Screen Repair D- | A Fresh Breeze - Mobile Window And Door Screen Repair D- | — | (805) 439-1461 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| A G & Industrial Enterprises INC | Paul Andrew Costamagna | — | (559) 892 1527 | Other | Porterville · Tulare County | — | — |
| A G & L Builders Corp | Steve Lujano | — | (408) 561 0854 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A G & Son Corporation | Godinez Antonio | — | (562) 397 8812 | GC, remodel, ADU | South Gate · Los Angeles County | — | — |
| A G - Comm Co | Togtokh Tumurbaatar | info@agcomm.com | (510) 375 1435 | Electricians | Berkeley · Alameda County | — | — |
| A G 7 Tile Natural Stone INC | Jose De Jesus Aguirre | — | (650) 722 0444 | Other | Tracy · San Joaquin County | — | — |
| A G A Construction INC | Doan Patrick | — | (818) 996 7575 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| A G A Electric & Consulting Services INC | Mark Barry Appleton | — | (619) 954 1265 | Electricians | San Diego · San Diego County | — | — |
| A G A Tile Stone | A G A Tile Stone | — | (415) 827 6775 | Other | Vallejo · Solano County | — | — |
| A G B Builder's INC | Baron Agustin Gonzalez | — | (408) 202 1242 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| A G B Electric | Grajeda Buitron Agustin | — | (619) 869 1229 | Electricians | Chula Vista · San Diego County | — | — |
| A G B General Contracting INC | Christopher Stewart Butler | — | (858) 688 5076 | GC, remodel, ADU | San Diego · San Diego County | — | — |