| Abm Electrical Power Services LLC | Keone Lee Castleberry | — | (800) 597 1225 | Electricians | Ontario · San Bernardino County | — | — |
| Abm Plastics | Michael Joseph Martorano | — | (909) 506 8655 | Other | Upland · San Bernardino County | — | — |
| Abm Tech Electric | Anthony Brian Burns | — | (909) 481 7347 | Electricians | Alta Loma · San Bernardino County | — | — |
| Above & Below Pool Service & Repair | Daniel Albert Celie | — | (760) 912 1068 | Pool | Apple Valley · San Bernardino County | — | — |
| Above & Beyond Construction | William Castro Iii Torres | — | (909) 307 9432 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Above & Beyond Painting | Above & Beyond Painting | — | (909) 744 0581 | Windows, patio, painters | Big Bear City · San Bernardino County | — | — |
| Above All Heating & Air Conditioning INC | Larry Joseph Hayes | — | (760) 949 2365 | HVAC | Hesperia · San Bernardino County | — | — |
| Above All Names Concrete Construction | John Cruz Pedregon | — | (909) 441 7027 | Other | Rialto · San Bernardino County | — | — |
| Above All Roofing INC | Timothy John Cardena | — | (909) 910 0878 | Other roofers | Redlands · San Bernardino County | — | — |
| Above Grade Concrete | Justin Shawn Hill | — | (909) 529 3296 | Other | Twin Peaks · San Bernardino County | — | — |
| Above N Beyond Roofing | Oloteo Anthony | — | (909) 499 1591 | Other roofers | Colton · San Bernardino County | — | — |
| Aboveground Solutions INC | Carlos Antonio Jr Garcia | — | (626) 634 9202 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Abraham Construction | John Patrick Abraham | — | (909) 264 0903 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| Absolute Best Concrete Coatings | Absolute Best Concrete Coatings | — | (909) 963 3585 | Other | Bloomington · San Bernardino County | — | — |
| Absolute Contractors INC | Grant Tylor Haugen | — | (909) 844 6383 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Absolute Electric Co | Johnathan Michael Laura | — | (760) 880 4988 | Electricians | Morongo Valley · San Bernardino County | — | — |
| Absolute Tree Service Inc. | Absolute Tree Service Inc. | — | (909) 586-8150 | Tree | Crestline · San Bernardino County | — | — |
| Abstract Pool Designs | Abstract Pool Designs | abstractpd@yahoo.com | (909) 641 6453 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| AC & Heating By Terry | AC & Heating By Terry | — | (951) 316 7320 | HVAC | San Bernardino · San Bernardino County | — | — |
| AC Guyz INC | Efren Martinez Zarate | — | (909) 733 9372 | HVAC | Redlands · San Bernardino County | — | — |
| AC Power 1 INC | Chris Nelson Gonzalez | — | (909) 835 3126 | Electricians | Ontario · San Bernardino County | — | — |
| AC Stair Construction | Cuevas Alfred | — | (909) 855 5319 | Other | Alta Loma · San Bernardino County | — | — |
| AC Tree Service INC | Elvira Carolina Clemente | — | (909) 380 6110 | Tree | Rialto · San Bernardino County | — | — |
| Ac/dc Electric | Guy William Milburn | — | (760) 947 9037 | Electricians | Oak Hills · San Bernardino County | — | — |
| Aca Technology INC | Kexun Xie | — | (909) 606 8000 | Electricians | Chino Hills · San Bernardino County | — | — |
| Accelerated Modular Concepts INC | Ramon Thomas Garza | — | (760) 245 4200 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Accelerated Structures | Accelerated Structures | amkryukov@gmail.com | (619) 672 5013 | GC, remodel, ADU | Earp · San Bernardino County | — | — |
| Accent J E H INC | Joseph Hugh Evans | — | (909) 379 9459 | GC, remodel, ADU | Lake Arrowhead · San Bernardino County | — | — |
| Acclaimed Electric Services INC | Neilon Zane Ollivierre | — | (909) 276 5232 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Accord Construction | Naser| Golriz Naser Hassanpour Golriz | interested@domainmarket.com | (714) 256 2400 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Accountable Air Conditioning Incorporated | Darren Joseph Rivera | — | (909) 307 4222 | HVAC | Chino Hills · San Bernardino County | — | — |
| Accu Temp | Accu Temp | — | (760) 244 2097 | HVAC | Hesperia · San Bernardino County | — | — |
| Accu-con Tile Contractors | Larry Mendoza Ii Varela | — | (909) 536 8280 | Other | Chino · San Bernardino County | — | — |
| Accurate Air Control | Accurate Air Control | — | (909) 794 4401 | Other | Mentone · San Bernardino County | — | — |
| Accurate Colors INC | Jeffrey Lynn Perry | — | (909) 484 4848 | Windows, patio, painters | Rancho Cucamonga · San Bernardino County | — | — |
| Accurate Door & Frame | Accurate Door & Frame | — | (909) 465 6705 | Other | Chino · San Bernardino County | — | — |
| Accurate Heating And Air Conditioning LLC | Steven Paul Jasso | — | (888) 702 4822 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Accurate Mobile Welding INC | Jeff Roger Johnson | info@accuratemobilewelding.com | (909) 225 9010 | Other | Upland · San Bernardino County | — | — |
| Accurate Ornamentals | Accurate Ornamentals | — | (909) 991 2657 | Other | San Bernardino · San Bernardino County | — | — |
| Accurate Overhead Door Systems INC | Wayne Stephen Jr Vinlove | — | (760) 956 3878 | Other | Hesperia · San Bernardino County | — | — |