| At Your Circuit | At Your Circuit | — | (909) 240 3136 | Electricians | Chino · San Bernardino County | — | — |
| Atc Builders INC | Abraham Alonso Ruiz | — | (909) 915 9134 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Ateck Construction INC | Ming-Chu Chen Chien | — | (909) 393 9798 | Electricians | Chino · San Bernardino County | — | — |
| Aterra Build INC | Junyan Sun | — | (626) 862 8514 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| Atg Energy Construction INC | Jun Wang | info@atgenergyconstruction.com | (949) 228 7049 | Electricians | Montclair · San Bernardino County | — | — |
| Athletic Field Specialists INC | Allen Dale Aragon | — | (909) 864 2530 | Windows, patio, painters | Highland · San Bernardino County | — | — |
| Atkinson Design | Atkinson Design | — | (909) 796 1183 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Atlantis Water Systems | Atlantis Water Systems | — | (888) 272 0933 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Atlas Roofing | Atlas Roofing | — | (818) 536-7661 | Other roofers | San Bernardino · San Bernardino County | — | — |
| Atm Technologies INC | Eric Allen Oropeza | info@atm-technologies.com | (909) 985 3155 | Other | Upland · San Bernardino County | — | — |
| Atom Electric Construction INC | Youngdo Park | — | (909) 519 8228 | Electricians | Chino Hills · San Bernardino County | — | — |
| Ats Tree Works INC | Jorge Roberto Estrada Alvarado | — | (626) 502 3775 | Other | Fontana · San Bernardino County | — | — |
| Auberry Enterprise | Auberry Enterprise | — | (310) 350 2103 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Audi Construction | James Arron Audi | contact@audiconstruction.com | (760) 964 9512 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Auer Construction | Hans Alois Auer | — | (760) 803 8545 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Augers Quality Painting | Joshua Bryan Augers | — | (760) 684 5255 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Aura General Builder | Aura General Builder | — | (562) 682 9272 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Aurelio Heating And Air Conditioning | Aurelio Heating And Air Conditioning | — | (909) 241 9731 | HVAC | Redlands · San Bernardino County | — | — |
| Austin Bradley Gardner | Austin Bradley Gardner | — | (909) 557 0265 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Authorized Audio Video INC | Ryan John Adair | — | (909) 547 4228 | Other | Chino Hills · San Bernardino County | — | — |
| Automatic Door Specialist INC | Timothy Martin Ventura | — | (909) 768 0860 | Other | Yucaipa · San Bernardino County | — | — |
| Auxano Construction | Ruiz Christopher | — | (909) 567 8444 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| Av Homes And General Construction INC | Flor Arely Villegas | — | (909) 871 5877 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| Av Plumbing And Rooter | Av Plumbing And Rooter | — | (909) 560 5046 | Other | Highland · San Bernardino County | — | — |
| Avac Stone | Luis Humberto Avila | — | (714) 720 4676 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Avelar's Custom Painting INC | Victor Alfonso Avelar | — | (626) 200 0046 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Avi Lux Remodeling INC | Garcia Enrique Aviles | — | (909) 659 7887 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| Avia Construction INC | John Young Chi | — | (626) 512 7209 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Avid Window Fashions | Avid Window Fashions | — | (909) 247 4799 | Other | Montclair · San Bernardino County | — | — |
| Avila Glass And Mirror | Avila Glass And Mirror | — | (909) 406 0600 | Windows, patio, painters | Colton · San Bernardino County | — | — |
| Avila Prime Builders LLC | Claudio Jr Avila | — | (909) 576 4707 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| Avilez Construction | Avilez Isidro | — | (909) 744 0411 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Avilez Construction INC | Isidro Avilez | — | (909) 744 0411 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Awesome Plumbing Pro | Awesome Plumbing Pro | service@awesomeplumbingpro.com | (909) 835 0190 | Other | Grand Terrace · San Bernardino County | — | — |
| Axel Sanchez Salazar | Axel Sanchez Salazar | — | (909) 653 3416 | Windows, patio, painters | Redlands · San Bernardino County | — | — |
| Axess Garage Door Repair | Axess Garage Door Repair | — | (951) 324 5310 | Other | Yucaipa · San Bernardino County | — | — |
| Axiom Construction | Paul Wayne Giroth | — | (909) 985 1781 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Axxess Door Corp | Mario Cesar Trejo | info@axxessdoor.com | (909) 206 1400 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Ayala's Tree Service L P | Jesus Arleni Ayala | — | (909) 936 1123 | Tree | Rialto · San Bernardino County | — | — |
| Ayers Construction | Christopher Lee Ayers | — | (909) 899 1407 | Other | Rancho Cucamonga · San Bernardino County | — | — |