| Artisan Craft Custom Builders LLC | Joseph Lyle Lewis | accbhomebuilt@gmail.com | (909) 567 6488 | GC, remodel, ADU | Twin Peaks · San Bernardino County | — | — |
| Artisan General Construction | Juan Antonio Barrios Perez | — | (909) 436 8482 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| Artisan Tile | Artisan Tile | — | (909) 900 5095 | Other | Big Bear Lake · San Bernardino County | — | — |
| Artistic Drywall | Artistic Drywall | — | (909) 920 0243 | Other | Upland · San Bernardino County | — | — |
| Artistic Expressions By J & L | Lisa Aurora Provenza-Bebar | — | (760) 774 4334 | Windows, patio, painters | Yucca Valley · San Bernardino County | — | — |
| Artistic Sound & Cinema INC | Jeffrey Michael Siegel | — | (909) 476 2910 | Other | Upland · San Bernardino County | — | — |
| Artistico Builder INC | Sanchez Yadir | — | (909) 268 3981 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Arturo's Tree Service INC | Nereida Limon | — | (909) 920 4258 | Tree | Upland · San Bernardino County | — | — |
| Arv Landscape & Hardscape | Arv Landscape & Hardscape | — | (424) 219 6090 | Windows, patio, painters | Hesperia · San Bernardino County | — | — |
| Arws Pools | Aparicio Juarez Christopher | — | (714) 404 6344 | Pool | Chino · San Bernardino County | — | — |
| Arzate's Landscaping | Arzate's Landscaping | — | (760) 221 7524 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| As Plumbing & Mechnical INC | Anthony Gene Ii Sarabia | — | (909) 260 4056 | Other | Fontana · San Bernardino County | — | — |
| Asap General Contractors INC | Shahram Yousefian | — | (747) 777 0940 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Asc Mechanical INC | Aldo Salvador Campos | — | (909) 313 7771 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Ascend Building Co | Jose Luis Jr Nunez | — | (909) 640 1121 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Ascend Design And Construction INC | Miguel Espiritu | — | (909) 349 7513 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Ascendance Construction & Electrical | Ruben Jr Licea | — | (909) 278 1670 | Electricians | Chino · San Bernardino County | — | — |
| Ascent Air Conditioning & Heating INC | Derek Germain Lenz | — | (909) 255 2329 | HVAC | Yucaipa · San Bernardino County | — | — |
| Ascent Plumbing INC | Jonathon David Walker | — | (909) 446 0689 | Other | Yucaipa · San Bernardino County | — | — |
| Ascentia Engineering Services INC | Theodore Roosevelt Iii Cash | — | (909) 338 5197 | HVAC | Crestline · San Bernardino County | — | — |
| Ase Millwork And Fixture Installation LLC | Carlos Lopez Mota | — | (951) 992 2188 | Other | Hesperia · San Bernardino County | — | — |
| Ash Construction | James Steven Ash | ashconstructionservicesuk@gmail.com | (909) 732 7101 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Asher Construction INC | Linda Marquez | beno@asherconstruction.com | (626) 818 6624 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Ashka Design & Construction | Ohan Krikor Hazarshahian | — | (909) 609 6450 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Ashton Enterprise | Ashton Enterprise | — | (909) 841 0710 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Ashyer Built Construction LLC | Katrina Ann Mailo | — | (909) 762 9435 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Asp Security Services | Asp Security Services | info@aspsecurity.com | (888) 632-7099 | Alarm and generators | Redlands · San Bernardino County | — | — |
| Aspen Plumbing | Aspen Plumbing | — | (909) 376 8853 | Other | Alta Loma · San Bernardino County | — | — |
| Aspire Communications Developers LLC | Chase C Everett | — | (951) 818 3880 | Electricians | Rialto · San Bernardino County | — | — |
| Asrs Construction INC DBA Rj Construction | Ray Anthony Saldivar | — | (909) 936 6750 | GC, remodel, ADU | Sugarloaf · San Bernardino County | — | — |
| Assertive Tile Plus INC | Lorenzo Gutierrez | — | (909) 991 3960 | Other | Bloomington · San Bernardino County | — | — |
| Asset Recovery Demolition | Ambed Prasad | — | (909) 663 4796 | Other | Highland · San Bernardino County | — | — |
| Associated Rebar INC | Phillip Babe Babbitt | — | (831) 758 1820 | Other | Redlands · San Bernardino County | — | — |
| Assurance Sheet Metal | Assurance Sheet Metal | — | (909) 587 7133 | Other | Fontana · San Bernardino County | — | — |
| Assured Fire Systems INC | Donald Patrick Iii Mcbride | — | (909) 844 7868 | Other | Redlands · San Bernardino County | — | — |
| Assured Glass INC | Collin Oneil Tugman | — | (909) 268 6717 | Windows, patio, painters | Rancho Cucamonga · San Bernardino County | — | — |
| Assured Shutters INC | Richard Francis Morris | — | (909) 241 8094 | Other | Rialto · San Bernardino County | — | — |
| Astera Kitchen And Bath Cabinets | Jessica Anastasia Young | — | (323) 721 4200 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Astons Floor Covering | Astons Floor Covering | — | (619) 481 0181 | Other | Redlands · San Bernardino County | — | — |
| At Home Service Solutions INC | Randall Richard Henak | — | (951) 304 9961 | HVAC | Alta Loma · San Bernardino County | — | — |