| All State Earth Moving Company | Maribel Orozco | — | (951) 377 2037 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| All State Renovation LLC | Ahmad Haitham Abuhmeidan | — | (323) 770 8800 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| All State Renovations & Construction | Rigoberto Ortega-Espinoza | — | (909) 648 3548 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| All State Tree Care | Leticia Aguayo | — | (909) 327 5529 | Tree | San Bernardino · San Bernardino County | — | — |
| All Tankless Water Heater And Plumbing | Moya Soto Pedro | — | (909) 452 4689 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| All Tech Commercial Pool Service & Repair | Taryn Daniel Huntl Araos | — | (706) 315 9685 | Pool | Ontario · San Bernardino County | — | — |
| All The Above Elevator | All The Above Elevator | — | (626) 705 8084 | Other | Alta Loma · San Bernardino County | — | — |
| All Time Heating & Air | All Time Heating & Air | — | (909) 660 0933 | HVAC | Highland · San Bernardino County | — | — |
| All Trade Co INC DBA Kenneth Licon General Contractor | Kenneth Richard Licon | — | (909) 516 8647 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| All Trade Decking | Roger Alberto Aguilar | — | (909) 843 7219 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| All Weather Roofing | Stephen Gregory Roberts | — | (909) 981 6498 | Other roofers | Chino · San Bernardino County | — | — |
| All Western Construction | Ziad Georges Rizk | — | (510) 325 4772 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| All Year Construction & Maintenance Corp | Kenneth James Cunnyngham | — | (909) 391 1923 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| All Year Sunrise Concrete INC | Damian Dominic Vasquez | — | (951) 275 2929 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| All-in-one Electrical Systems INC | La Luz Meza Leonel De | projects@all-in-one-electricalsystems.com | (714) 679 8238 | Electricians | Fontana · San Bernardino County | — | — |
| All-star Backflow INC | David Suarez | backflowallstars@gmail.com | (909) 225 9903 | Other | Chino · San Bernardino County | — | — |
| All-star Framing INC | Erick Flores | — | (951) 255 5578 | Other | Fontana · San Bernardino County | — | — |
| Allan Lin | Allan Lin | — | (626) 227 3430 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Allbright Restoration Company | Michael John Bonifazi | — | (760) 218 2829 | Restoration | Yucca Valley · San Bernardino County | — | — |
| Allegiance Air & Mechanical | Allegiance Air & Mechanical | — | (760) 552 4500 | HVAC | Victorville · San Bernardino County | — | — |
| Allegiance Air & Mechanical INC | Cecilia Sue Libuse | — | (760) 403 0462 | HVAC | Victorville · San Bernardino County | — | — |
| Allegiance Construction | Hernandez Jerry | — | (909) 244 9293 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Allegiance Glass | Allegiance Glass | — | (760) 927 8389 | Windows, patio, painters | Victorville · San Bernardino County | — | — |
| Allegiant Framing | Allegiant Framing | — | (760) 571 7389 | Other | Yucca Valley · San Bernardino County | — | — |
| Allen Cayir | Allen Cayir | — | (909) 595 8599 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Allen Construction | David Wayne Allen | — | (760) 963 7426 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Allen Dean Rose | Allen Dean Rose | — | (760) 963 4090 | Other | Apple Valley · San Bernardino County | — | — |
| Allen Lighting Services INC | Chase Allen Davis | — | (951) 529 3686 | Electricians | Colton · San Bernardino County | — | — |
| Allen Plumbing | Allen Plumbing | eben@eyebytes.com | (323) 377 5235 | Other | Rialto · San Bernardino County | — | — |
| Allen-de Roofing/drywall Contractor | Raul Alfredo Allende | — | (909) 851 8363 | Other roofers | Rancho Cucamonga · San Bernardino County | — | — |
| Allezrin Construction | Alvaro G Marin | — | (909) 746 7252 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Allglass Bath INC | Martha Jo Womack | — | (909) 931 3150 | Other | Upland · San Bernardino County | — | — |
| Alliance | Gonzalez Ricardo | — | (800) 930 2476 | Other | Fontana · San Bernardino County | — | — |
| Alliance Communication Services INC | Devin Thomas Tustin | — | (909) 627 6140 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Alliance Construct & Restore INC | Eduard N Varga | — | (909) 522 6503 | HVAC | Loma Linda · San Bernardino County | — | — |
| Alliance Construction Co | Greg Mark Tonkinson | info@allianceconstruction.com | (909) 952 5025 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Alliance Construction Group INC | Francisco Javier Aceves | — | (909) 261 8999 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| Alliance Contractors INC | Luis Gabriel Zamora | — | (562) 739 4825 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Alliance Development And Construction INC | Bryan Scott Marshall | — | (909) 478 9000 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Allied American Construction | Julian Alexander Daoud | — | (626) 221 3813 | GC, remodel, ADU | Upland · San Bernardino County | — | — |