| Arc General Contractors | Chilel Agustin Ramirez | — | (626) 345 8869 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Arc Mechanical | Arc Mechanical | — | (760) 289 9054 | Other | Yucca Valley · San Bernardino County | — | — |
| Arce Painting | Arce Painting | — | (909) 844 2510 | Windows, patio, painters | Cedar Glen · San Bernardino County | — | — |
| Arch Equipment Kathryn Arch And/or Paul Arch | Paul Leslie Arch | — | (760) 218 4470 | Other | Oak Hills · San Bernardino County | — | — |
| Archer Drywall Contracting INC | Vicki Lee Archer | — | (760) 403 3527 | Other | Victorville · San Bernardino County | — | — |
| Archibald Plumbing | Archibald Plumbing | archibaldplumbing@yahoo.com | (951) 990 7077 | Other | Alta Loma · San Bernardino County | — | — |
| Architectural Painting | Architectural Painting | info@architecturalpainting.com | (909) 261 1506 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| Architekton General Contracting | Paula Marie Garcia | — | (760) 780 8464 | GC, remodel, ADU | Oak Hills · San Bernardino County | — | — |
| Arco Glass Plus INC | Vaca Abelardo Rodriguez | arcoglassplus@gmail.com | (323) 837 8747 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Arco Plumbing INC | Cristian Edberson Torres | — | (818) 462 3699 | Other | San Bernardino · San Bernardino County | — | — |
| Arcor Rooter Corp | Leonel Alexis Nobile | — | (626) 543 0725 | Other | Rialto · San Bernardino County | — | — |
| Arcos Cabinets INC | Juan Carlos Arcos | — | (626) 498 3639 | Other | San Bernardino · San Bernardino County | — | — |
| Arctic Cooling Systems LLC | Eric Kevin Ich | — | (909) 270 2111 | HVAC | Chino · San Bernardino County | — | — |
| Arda Construction | Guillermo Rios | info@arda-construction.com | (909) 247 7223 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Areacomm | Jerry Roland Rodriguez | — | (702) 203 8108 | Other | Newberry Springs · San Bernardino County | — | — |
| Arena Construction Cleanup | David John Kooiman | — | (909) 285 9566 | Electricians | Ontario · San Bernardino County | — | — |
| Ares Signs & Gfx | Nancy Jacqueline Candelaria | — | (909) 321 4800 | Other | Rialto · San Bernardino County | — | — |
| Ari Contracting INC | Rafael Gonzalez | — | (909) 505 2328 | Other | Yucaipa · San Bernardino County | — | — |
| Arias Electrical Services | Arias Alejandro | — | (626) 643 9724 | Electricians | Ontario · San Bernardino County | — | — |
| Arias Interior Systems Drywall Metal Framing | Gilberto Iii Arias | — | (909) 727 7844 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Arias Investments | David Arias | — | (909) 275 1086 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Arias Plumbing | Jesus Jr Arias | — | (310) 894 1729 | Other | Fontana · San Bernardino County | — | — |
| Ariaz Construction | Michael Daniel Arias | — | (760) 985 9938 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Aries Construction | David Wayne Junker | — | (760) 219 6030 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Aries Electric INC | Cesar Julio Morales | — | (909) 770 2786 | Electricians | Fontana · San Bernardino County | — | — |
| Arijet Corporation | Andrew Arijet Morris | info@arijet.com | (817) 228 9059 | Other | Ontario · San Bernardino County | — | — |
| Arispe Concrete | Arispe Concrete | — | (951) 840 7905 | Other | Chino · San Bernardino County | — | — |
| Arlo Concrete INC | Rodrigo Arturo Lopez Gaxiola | — | (760) 493 0495 | Other | Victorville · San Bernardino County | — | — |
| Arm Construction Solutions INC | Anthony Sagginario | — | (626) 905 3049 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Armada Earthworks INC | Rodriguez Esteban | — | (909) 969 0182 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Armand Hammer Builds LLC | Armand Anthony Rubio | — | (909) 276 4447 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Armando Camarena | Armando Camarena | — | (909) 973 9144 | Other | Chino Hills · San Bernardino County | — | — |
| Armando Esparza | Armando Esparza | — | (626) 905 1192 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Armando Melo Electric | Armando Jr Melo | — | (909) 714 0695 | Electricians | Grand Terrace · San Bernardino County | — | — |
| Armando Salcedo | Armando Salcedo | — | (909) 210 3009 | HVAC | Alta Loma · San Bernardino County | — | — |
| Armando Scaffolding | Jesse Armando Rosales | — | (626) 771 8244 | Other | Rialto · San Bernardino County | — | — |
| Armando's Plumbing | Armando's Plumbing | — | (760) 577 4803 | Other | Barstow · San Bernardino County | — | — |
| Armando's Tree Service | Armando's Tree Service | — | (909) 574-6063 | Tree | Rialto · San Bernardino County | — | — |
| Armandos Golden Brush Painting | Armando Ivan Contreras Morales | armandosgoldenbrush@gmail.com | (909) 232 2243 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Armor Coat Painting And Restoration | Armor Coat Painting And Restoration | — | (909) 709 4964 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |