| Ayala's Construction | Jose J Ayala | — | (951) 897 7476 | GC, remodel, ADU | Cherry Valley · Riverside County | — | — |
| Ayala's Construction INC | Carlos Roberto Ayala Alas | — | (909) 845 7785 | GC, remodel, ADU | Cherry Valley · Riverside County | — | — |
| Ayala's Roofing INC | Ayala Jose Pena | jpena@ayalasroofing.com | (951) 640 1234 | Other roofers | Moreno Valley · Riverside County | — | — |
| Ayas Racks | Ortega Anabel Ramos | — | (951) 231 0937 | Other | Riverside · Riverside County | — | — |
| Ayers Contracting Company INC | Lonnie Lee Jr Ayers | — | (951) 487 9140 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Ayers Electric | William Brian Ayers | — | (951) 522 8975 | Electricians | Temecula · Riverside County | — | — |
| Ayers Plastering | Ayers Plastering | — | (760) 421 7528 | Other | Temecula · Riverside County | — | — |
| Ayomx Power Solutions | Javier Angel Mendoza | — | (951) 448 5546 | Electricians | Corona · Riverside County | — | — |
| Az Construction | Ayazi Shahriar | — | (760) 809 6231 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| Az Painting | Az Painting | — | (760) 989 3698 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Azdea Group INC | Artur Maksoev | info@indiantypefoundry.com | (760) 393 1424 | Electricians | Indio · Riverside County | — | — |
| Azhar S Riaz | Azhar S Riaz | — | (951) 522 0325 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Azi INC | Andreas Nicholas Zinelis | — | (951) 797 3230 | Other | Cherry Valley · Riverside County | — | — |
| Aztec Electric | Kenneth Leroy Riggs | service@aztecelectric.com | (951) 279 0424 | Electricians | Corona · Riverside County | — | — |
| Aztec Fire And Security INC | William Manuel Flores | — | (877) 691 3302 | Electricians | Riverside · Riverside County | — | — |
| Aztec General Painting INC | Paz Guillermo Jimenez | — | (714) 470 6348 | Windows, patio, painters | Perris · Riverside County | — | — |
| Aztec Landscaping | Roberto Arcos Martinez | i.magarciaa@gmail.com | (760) 398 7738 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Aztec Pool Service INC | Casey Heinz Johns | — | (760) 696 7915 | Pool | Murrieta · Riverside County | — | — |
| Aztec Septic | Gary Robert Johnson | — | (951) 704 5890 | Other | Murrieta · Riverside County | — | — |
| Aztec Sheet Metal | Aztec Sheet Metal | — | (760) 593 9085 | Other | Moreno Valley · Riverside County | — | — |
| Azteca Landscape | Aurora Farias | — | (909) 673 0889 | Windows, patio, painters | Corona · Riverside County | — | — |
| Aztecs Telecom INC | Tony Charles Watterson | — | (714) 323 3606 | Electricians | Corona · Riverside County | — | — |
| Azul Plastering INC | Fredis Eloy Guzman | — | (951) 368 8226 | Other | Riverside · Riverside County | — | — |
| Azure Pools & Spas INC | Rick Joseph Neff | — | (760) 322 7665 | Pool | Palm Desert · Riverside County | — | — |
| B & A Construction & Renovations LLC | Ricardo Perez Aguilar | — | (760) 774 6376 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| B & B Electric | William Henry Jr Payne | — | (909) 556 4500 | Electricians | Riverside · Riverside County | — | — |
| B & B Electric | Robert Glenn Burk | — | (951) 781 7139 | Electricians | Riverside · Riverside County | — | — |
| B & B Masonry | B & B Masonry | — | (760) 845 5867 | Other | Hemet · Riverside County | — | — |
| B & B Nurseries INC DBA The Landscape Center | Mark Alan Barrett | — | (951) 352 8383 | Windows, patio, painters | Riverside · Riverside County | — | — |
| B & B Pump Service INC | Marco Antonio Pagan | — | (951) 678 3282 | Other | Wildomar · Riverside County | — | — |
| B & C Electric Corp | Robert Victor Iv Burns | — | (760) 429 9144 | Electricians | Temecula · Riverside County | — | — |
| B & G Garage Doors | Arturo Leyva Garcia | — | (909) 851 0699 | Other | Jurupa Valley · Riverside County | — | — |
| B & J Paint INC | Leon Jorge Ortiz | — | (760) 807 7907 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| B & M Air Conditioning | B & M Air Conditioning | — | (760) 668 0520 | HVAC | Palm Springs · Riverside County | — | — |
| B & M Electric | Harry William Le Gro | — | (951) 623 0311 | Electricians | Wildomar · Riverside County | — | — |
| B & M Remodeling | B & M Remodeling | — | (760) 578 0406 | GC, remodel, ADU | Indio · Riverside County | — | — |
| B & S Builders United LLC | Mario Antonio Benigni | — | (951) 928 2020 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| B A B Construction Incorporated | Tavia Diane Guyer | — | (951) 689 0647 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| B A M Landscapes And More INC | Michael Dean Kocour | — | (760) 702 5884 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| B And B General Contractors INC | Braden Nils Ramirez | — | (951) 581 5678 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |