| Albers Development Corporation | Teo Jr Albers | — | (909) 992 9481 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Albers Mfg Co INC | Teo Stephan Albers | — | (909) 597 5537 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Albert Carlucci | Albert Carlucci | — | (760) 403 3919 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Albert Sanchez Construction | Sanchez Albert | — | (909) 301 9539 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Albert Sargsyan | Albert Sargsyan | — | (818) 719 0000 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Albert Sharp | Albert Sharp | — | (909) 899 6987 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Albert's General Construction | Albert Javier Ii Ramirez | — | (951) 903 8570 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Albert's Heating Ventilating And Air Conditioning | Orlando Manarang Valderrama | — | (909) 899 2300 | HVAC | Fontana · San Bernardino County | — | — |
| Alberto Garcia Construction Services INC DBA A G Construction | Lorena De Lira Salinas | — | (909) 986 7878 | Electricians | Ontario · San Bernardino County | — | — |
| Alberto Garcia Contractor | Alberto Garcia Contractor | — | (951) 905 7979 | Electricians | Ontario · San Bernardino County | — | — |
| Alberto Lucas Amezcua | Alberto Lucas Amezcua | — | (909) 269 6954 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Albis Heating & Air Conditioning | Albis Heating & Air Conditioning | — | (909) 938 6111 | HVAC | San Bernardino · San Bernardino County | — | — |
| Albx LLC DBA Usa Fire Protection | Arthur Timothy Stafford | — | (951) 333 9380 | Other | Chino · San Bernardino County | — | — |
| Alc Roofing | Fernie Giovanni Alcaraz | — | (909) 240 8852 | Other roofers | Ontario · San Bernardino County | — | — |
| Alcala's 360 Remodeling | Alcala's 360 Remodeling | — | (760) 694 2523 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Alcaraz Plumbing Corp | Sandra Luz Martinez Chavez | — | (424) 757 8359 | Other | San Bernardino · San Bernardino County | — | — |
| Alchemy Electric Corp | Rodrigo Romero Ronquillo | — | (951) 237 0349 | Electricians | Upland · San Bernardino County | — | — |
| Alcon Signs | Alcon Signs | — | (626) 221 3298 | Other | Fontana · San Bernardino County | — | — |
| Alder Electric INC | David William Cartwright | — | (909) 538 7026 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Alderete Concrete | Alderete Concrete | aldereteconcrete86@gmail.com | (909) 684 2769 | Other | Fontana · San Bernardino County | — | — |
| Aldo Construction Company | Aldo Heriberto Sr Gomez Garcia | — | (909) 452 4183 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Alejandro Berumen | Alejandro Berumen | — | (909) 376 9168 | Other | Oak Hills · San Bernardino County | — | — |
| Alejandro Fuentes | Alejandro Fuentes | — | (909) 641 1947 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Alejandro Perez | Alejandro Perez | — | (909) 496 1920 | Other | Yucaipa · San Bernardino County | — | — |
| Alejandro Pinto Mejia | Alejandro Pinto Mejia | — | (909) 764 9343 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Alejandro's Heating & Air Conditioning | Alejandro's Heating & Air Conditioning | — | (909) 520 6627 | HVAC | Hesperia · San Bernardino County | — | — |
| Alejandro's Painting Corporation | Alejandro Guerrero | — | (909) 230 2259 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Alejandros Tree Service | Alejandros Tree Service | — | (909) 694-8945 | Tree | Rialto · San Bernardino County | — | — |
| Aleka Concrete | Aleka Concrete | — | (909) 574 0122 | Other | Fontana · San Bernardino County | — | — |
| Aleka Demolition | Aleka Demolition | — | (909) 278 9195 | Other | Fontana · San Bernardino County | — | — |
| Alemans Plumbing Service INC | Cristian Aleman-Aleman | — | (626) 625 4470 | Other | Rialto · San Bernardino County | — | — |
| Alert Security Systems INC | Raymond John Danna | — | (909) 946 5787 | Electricians | Upland · San Bernardino County | — | — |
| Alesam Construction | Aparicio Daniel Garcia | — | (626) 549 5328 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Alex A Pacheco | Alex A Pacheco | — | (909) 200 8603 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Alex B Painting & Wallcovering | Alex B Painting & Wallcovering | — | (760) 981 5575 | Windows, patio, painters | Hesperia · San Bernardino County | — | — |
| Alex Bonnin | Alex Bonnin | — | (909) 772 2330 | Other | Chino Hills · San Bernardino County | — | — |
| Alex Catinean | Alex Catinean | — | (909) 731 9005 | Electricians | Redlands · San Bernardino County | — | — |
| Alex Custom Painting & Coatings | Alejandro Juarez-Preciado | — | (951) 285 6326 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Alex Electrical Services INC | Sanchez Vazquez Alejandro | — | (909) 292 8731 | Electricians | Ontario · San Bernardino County | — | — |
| Alex Fernandez | Alex Fernandez | bootstrap@twitter.com | (626) 691 7183 | Other | Fontana · San Bernardino County | — | — |