| A M S Construction | Stephen Paul Hetrick | — | (916) 847 1142 | Other roofers | Roseville · Placer County | — | — |
| A M S Construction | Jeramie Wayne Jones | — | (833) 267 7663 | Other roofers | Riverside · Riverside County | — | — |
| A M S Construction INC | Fazlollahi Farhad | — | (408) 244 0940 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| A M S Drywall Specialists | A M S Drywall Specialists | — | (714) 742 3120 | Other | Corona · Riverside County | — | — |
| A M S Fireplace INC | Ayman Marouf Suleiman | — | (888) 210 4665 | Other | Carlsbad · San Diego County | — | — |
| A M S Framing | A M S Framing | — | (949) 294 4723 | Other | Mission Viejo · Orange County | — | — |
| A M S Heating INC | Arthur Dean Sanders | — | (209) 466 6692 | HVAC | Stockton · San Joaquin County | — | — |
| A M S Proper Floors INC | Jose Mauricio Alba Garibay | — | (510) 825 1587 | Other | Hayward · Alameda County | — | — |
| A M S Security Systems | A M S Security Systems | — | (408) 497 1027 | Electricians | San Jose · Santa Clara County | — | — |
| A M Shine Electric INC | Joseph Ethan Ben Chetrit | — | (818) 883 8606 | Electricians | West Hills · Los Angeles County | — | — |
| A M Star Construction INC | Kristine Wilhelmina Achkar | — | (888) 374 2326 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| A M Stephens Concrete INC | Gina Sherene Ostlund | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A M Stephens Construction Co INC | Jennifer Lynn Cairns | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A M Stucco INC | Martinez Abraham | — | (916) 459 6106 | Other | Sacramento · Sacramento County | — | — |
| A M T Air Conditioning & Heating | Andre Torosyan | — | (818) 800 4486 | HVAC | Sun Valley · Los Angeles County | — | — |
| A M T Systems INC | Carolyn Ann Eblin | — | (661) 251 4206 | Electricians | Canyon Country · Los Angeles County | — | — |
| A M Tree Service | Adrian Martinez Hernandez | — | (510) 862 9965 | Tree | Hayward · Alameda County | — | — |
| A M V Connect | Gonzalez Andy | — | (858) 221 0029 | Other | San Diego · San Diego County | — | — |
| A M V Construction INC | Aramel Villa | — | (559) 313 9234 | GC, remodel, ADU | Madera · Madera County | — | — |
| A M Warrior Roofing INC | Alfredo Manuel Lopez | — | (916) 494 1873 | Other roofers | Yuba City · Sutter County | — | — |
| A M West Mechanical INC | Lutsker Sam | info@amwestmechanical.com | (415) 254 2931 | Other | San Francisco · San Francisco County | — | — |
| A M Wighton And Sons DBA A & J Refrigeration | James Sandborn Pape | — | (805) 543 7458 | HVAC | San Luis Obispo · San Luis Obispo County | — | — |
| A M Y Electric | Edry Amram | info@amyelectric.com | (818) 302 5614 | Electricians | Winnetka · Los Angeles County | — | — |
| A M Z Electric | Zadoor Massis | — | (925) 216 8894 | Electricians | Livermore · Alameda County | — | — |
| A M Z Services | Zahedi Amin | — | (310) 622 2727 | Electricians | Sun Valley · Los Angeles County | — | — |
| A Magic Tub Repair | A Magic Tub Repair | — | (562) 201 4309 | Other | Hemet · Riverside County | — | — |
| A Magnusson Development | A Magnusson Development | — | (760) 535 8213 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| A Man Around The House INC | James Sean| Mattingly Sean Mattingly | — | (415) 297 4956 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| A Manecer Landscape | A Manecer Landscape | — | (925) 567 6367 | Windows, patio, painters | Orinda · Contra Costa County | — | — |
| A Maravilla Construction INC | David Ignacio Vazquez | — | (707) 803 3287 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| A Martin Plumbing Co | Arthur Hubalde Martin | — | (408) 250 6150 | Other | San Jose · Santa Clara County | — | — |
| A Martinez Construction | Martinez Alfred | — | (323) 270 0222 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A Max Plumbing LLC | Ashraf S Salama | — | (800) 944 4788 | Other | Bellflower · Los Angeles County | — | — |
| A Mayberry Adu | William Aaron Van Roo | hello@mayberryworkshop.com | (408) 294 7775 | HVAC | Santa Clara · Santa Clara County | — | — |
| A Mc Carthy Engineering INC | Angus Fursey Mc Carthy | — | (415) 269 1780 | Other | San Francisco · San Francisco County | — | — |
| A Meadows Construction INC | Aaron Anthony Meadows | — | (925) 625 4951 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| A Mechanical Heating & Air INC | Alejandro Garcia | — | (310) 968 1801 | HVAC | Buena Park · Orange County | — | — |
| A Mendez Construction | Mendez Lechuga Avelino | — | (714) 650 3115 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| A Meono Painting | A Meono Painting | — | (415) 846 0167 | Windows, patio, painters | Oakley · Contra Costa County | — | — |
| A Mettle Production | A Mettle Production | — | (650) 302 2520 | Other | Pacifica · San Mateo County | — | — |