| Americas Fire Protection | Americas Fire Protection | — | (714) 406 7715 | Other | Menifee · Riverside County | — | — |
| Americhlor Services | Jeremy Michael Truesdell | — | (951) 208 4874 | Other | Moreno Valley · Riverside County | — | — |
| Amerieast Of California INC | Steven Roger Reiter | — | (760) 341 1183 | Other | Palm Desert · Riverside County | — | — |
| Ameriken Mitchell Enterprises INC | Kenneth Marlin Mitchell | — | (760) 492 9547 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Ameripacific Construction Service | Steve S Deonarine | — | (951) 531 8023 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Ameriserve Plumbing And Rooter | Ameriserve Plumbing And Rooter | — | (951) 427 9620 | Other | Norco · Riverside County | — | — |
| Amerishade Blinds Installation | Amerishade Blinds Installation | — | (760) 485 5272 | Other | Rancho Mirage · Riverside County | — | — |
| Ameristar Windows | Conor John Loushin | — | (951) 354 2711 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Ameriwest Builders INC | Roman Gerson Pliego | — | (714) 280 6405 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Ameriwest Heating And Cooling | Roman Gerson Pliego | — | (714) 262 1317 | HVAC | Riverside · Riverside County | — | — |
| Amerriway Geo Membrane | Benjamin Cruz | — | (951) 581 0633 | Other | Perris · Riverside County | — | — |
| Amethyst Tile & Stone | Garcia Antonio Martinez | — | (951) 470 5992 | Other | Corona · Riverside County | — | — |
| Amex General Construction | Chris Anthony Perez Alvarez | — | (951) 409 6708 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Amezcua Concrete Stain INC | Debra Amezcua | — | (951) 545 3219 | Other | Perris · Riverside County | — | — |
| Amg Construction Company Incorporated | Dennis Gallardo Villegas | — | (714) 409 3991 | GC, remodel, ADU | Banning · Riverside County | — | — |
| Amg Construction Services LLC | Adriel G Magana | — | (626) 327 7748 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Amigo Mechanical INC | Adrian Castellanos | — | (951) 287 8775 | HVAC | Winchester · Riverside County | — | — |
| Amii Construction | Arturo Ii Medina | — | (951) 830 8967 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Amjad Othman | Amjad Othman | — | (951) 295 9206 | Other | Moreno Valley · Riverside County | — | — |
| Ammirata Construction & Interiors INC | Guillermo Mauricio Ammirata | — | (951) 816 1557 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Amore Painting INC | Charles Boycan Graves | — | (951) 858 5222 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Amp Air LLC | David Hany Sadalla | — | (619) 386 6250 | HVAC | Corona · Riverside County | — | — |
| Amp Fire | Andrew Maurice Pinon | — | (805) 705 4222 | Other | Riverside · Riverside County | — | — |
| Amp Pool And Spa LLC | Munoz Padilla Adrian | — | (760) 905 6749 | Pool | Cathedral City · Riverside County | — | — |
| Ampco Contracting INC | Reginald Kawale Iv Kama | — | (949) 955 2255 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Amped Up Electrical | Andrew Ernest Newvine | shawnbelwigan@amped-up-electrical.com | (951) 669 3046 | Electricians | Menifee · Riverside County | — | — |
| Ample Air Systems | Ample Air Systems | — | (951) 785 1611 | HVAC | Riverside · Riverside County | — | — |
| Ampro Plumbing & Leak Detection INC | Arash Norooz Mazandarani | — | (714) 808 2271 | Other | Corona · Riverside County | — | — |
| Ams Landscape & Design | Leonel Meza-Vasquez | — | (760) 275 6059 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Ams Plumbing | Bryan Jeffrey Ditty | — | (951) 295 3741 | Other | Beaumont · Riverside County | — | — |
| Ams So Cal Builders INC | Adrian Santiago | info@amssocalbuilders.com | (909) 641 8223 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Amseb INC DBA All Door Tech | Cortez Raul | — | (562) 716 0254 | Other | Riverside · Riverside County | — | — |
| Amstyle Constructions | Amstyle Constructions | — | (951) 818 9111 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| Amtec Service Company INC | Clifford Larry Webb | info@amtecservice.com | (951) 695 1855 | Electricians | Temecula · Riverside County | — | — |
| Amy Watanabe-reed | Amy Watanabe-reed | — | (951) 779 6542 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Amz Concrete INC | Zepeda Adan Morales | — | (909) 848 3090 | Other | Beaumont · Riverside County | — | — |
| Anaya's Construction | Jose Angel Anaya | — | (760) 835 2747 | HVAC | Indio · Riverside County | — | — |
| Anaya's Construction Services | Oscar Anaya | — | (951) 840 0590 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Anc Builders Maintenance INC | David Romero | — | (714) 278 5798 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Anc Construction | William Edward Henderson | — | (760) 712 6930 | GC, remodel, ADU | Temecula · Riverside County | — | — |