| Ark Mechanical | Rito Esteban Simental | — | (760) 200 7586 | Other | Coachella · Riverside County | — | — |
| Arka Tile | Morfin Aaron Soto | — | (951) 513 8300 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Arlington Construction | Rudy James Aguilar | — | (909) 223 2645 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Arm Air Conditioning Mechanical | Arm Air Conditioning Mechanical | — | (626) 456 0492 | HVAC | Perris · Riverside County | — | — |
| Arm Construction | Arturo Rosalio Medina | — | (951) 354 2351 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Armada Construction | Christian Ivan Hernandez | — | (760) 899 4797 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Armada Roofing INC | Garcia Lorena | — | (951) 443 0539 | Other roofers | Perris · Riverside County | — | — |
| Armageddon Concrete INC | Lemus Raul Lopez | — | (951) 772 9480 | Other | Hemet · Riverside County | — | — |
| Armando Enrique Townsend | Armando Enrique Townsend | — | (951) 285 1687 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Armando Lujano | Armando Lujano | — | (951) 236 6242 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Armando Morales Espinoza | Armando Morales Espinoza | — | (760) 296 6835 | Electricians | Indio · Riverside County | — | — |
| Armando Richard Torres | Armando Richard Torres | — | (951) 776 3162 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Armando Rosales Jr | Armando Rosales Jr | — | (760) 238 7045 | Other | Bermuda Dunes · Riverside County | — | — |
| Armando Salvador Garcia Iii | Armando Salvador Garcia Iii | — | (951) 201 8159 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Armando Vargas | Armando Vargas | — | (951) 392 5247 | GC, remodel, ADU | Homeland · Riverside County | — | — |
| Armando's Glass | Armando's Glass | — | (951) 385 5888 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Armando's Landscape | Armando's Landscape | armandoslandscapeservicesinc@gmail.com | (760) 902 0395 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Armas Drywall Construction Corp | Jose Armas Lopez | — | (951) 675 1322 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Armco Electric | Ayala Rodolfo | — | (760) 770 3136 | Electricians | Cathedral City · Riverside County | — | — |
| Armco Electric INC | Rodolfo Ayala | — | (760) 770 3136 | Electricians | Cathedral City · Riverside County | — | — |
| Armco Floor Covering | Armco Floor Covering | — | (951) 623 0103 | Other | Norco · Riverside County | — | — |
| Armor Asphalt | Armor Asphalt | — | (888) 688 9945 | Other | Perris · Riverside County | — | — |
| Armor Construction INC | Singleton John | carlydemil@gmail.com | (951) 545 3970 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Armour Roofing | Guzman Abdias Morales | — | (951) 764 1423 | Other roofers | Temecula · Riverside County | — | — |
| Armstrong & Aceves Company INC | Christopher Richard Armstrong | — | (951) 284 0251 | Other roofers | Norco · Riverside County | — | — |
| Armstrong Cabinets INC | John Thomas Armstrong | — | (951) 805 4885 | Other | Corona · Riverside County | — | — |
| Armstrong Tree Service | Andrew Patrick Armstrong | — | (951) 970 2612 | Tree | Murrieta · Riverside County | — | — |
| Arneson & Son's Construction | David Gerard Arneson | — | (951) 999 7763 | Electricians | Temecula · Riverside County | — | — |
| Arnold Barrera | Arnold Barrera | — | (951) 326 0210 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Arnold Floor Coverings INC | David Lynn Arnold | — | (951) 760 8055 | Other | Temecula · Riverside County | — | — |
| Arnold Venti Builders INC | Arnold Louis Venti | arnold@arnoldventi.com | (760) 535 6211 | GC, remodel, ADU | Aguanga · Riverside County | — | — |
| Arnoldo Moreno | Arnoldo Moreno | — | (760) 889 2992 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Arnolds A / C Service | Marin Arnold | — | (760) 772 3731 | HVAC | Palm Desert · Riverside County | — | — |
| Arriaga's Flooring INC | Jose Manuel Arriaga Barriga | — | (714) 866 7126 | Other | Riverside · Riverside County | — | — |
| Arrizon Concrete Construction Services | Eduardo Xaviar Arrizon | — | (951) 287 3163 | Other | Perris · Riverside County | — | — |
| Arrow Garage Doors | Arrow Garage Doors | — | (951) 927 5900 | Other | Hemet · Riverside County | — | — |
| Arrowhead Heating & Air Conditioning | Arrowhead Heating & Air Conditioning | — | (909) 809 8036 | HVAC | Beaumont · Riverside County | — | — |
| Arroyo's Flooring | Arroyo's Flooring | — | (909) 682 9319 | Other | Riverside · Riverside County | — | — |
| Arroyos Enterprises INC DBA Arroyos General Engineering | Jeffrey Joseph Brooks | — | (951) 219 3391 | Other | Temecula · Riverside County | — | — |
| Arrza Air | Arrza Air | — | (760) 574 6301 | HVAC | Coachella · Riverside County | — | — |