| Albo Electrical Solutions | Alberto Osvaldo Martinez | — | (951) 526 7235 | Electricians | Temecula · Riverside County | — | — |
| Alc Tile INC | Victor Alfonso Lopez Castro | — | (760) 972 0212 | Other | Indio · Riverside County | — | — |
| Alcala Construction | Gilbert Mark Alcala | — | (909) 772 8818 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Alcantars Welding Co | Oscar Junior Alcantar Villanueva | — | (951) 531 5092 | Other | Riverside · Riverside County | — | — |
| Alcaraz Air | Carlos Alcaraz | — | (951) 483 6276 | HVAC | Murrieta · Riverside County | — | — |
| Alcazar Heating And Air Conditioning LLC | Angel Chavez Jr Alcazar | — | (714) 597 9374 | HVAC | Wildomar · Riverside County | — | — |
| Alchemy Iron Works | Marbel Anibal Para | — | (909) 371 9973 | Other | Riverside · Riverside County | — | — |
| Alcon Colorado Engineering INC | James Floyd Jr Johnston | — | (951) 461 3302 | Other | Temecula · Riverside County | — | — |
| Alcon Custom Painting | Alcon Custom Painting | — | (760) 894 9474 | Windows, patio, painters | Indio · Riverside County | — | — |
| Aldana & Sons Construction INC | Sergio Antonio Jr Aldana | — | (951) 623 9551 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Aldaz Steel Fab | Aldaz Steel Fab | — | (951) 655 0487 | Other | Moreno Valley · Riverside County | — | — |
| Alecon Construction | Alejandro Javier Salazar | — | (951) 378 7305 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Alectric | Salas Jorge | — | (760) 275 3182 | Electricians | Desert Hot Springs · Riverside County | — | — |
| Alegria Construction | Gustavo Alegria Gonzalez | — | (909) 991 8121 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Alegria Hardscape Group | Velazquez Antonio Alegria | alegriahardscapegroup@yahoo.com | (951) 442 9227 | Windows, patio, painters | Perris · Riverside County | — | — |
| Alegria Landscape INC | Luis Alegria-Hernandez | — | (951) 235 3967 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Alejandro Becerra | Alejandro Becerra | — | (909) 486 8697 | Other | Beaumont · Riverside County | — | — |
| Alejandro Cruz | Alejandro Cruz | — | (951) 858 1526 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Alejandro Lopez-vazquez | Alejandro Lopez-vazquez | — | (760) 409 6441 | Other | Cathedral City · Riverside County | — | — |
| Alejandro Munoz | Alejandro Munoz | — | (951) 741 7606 | Other | Riverside · Riverside County | — | — |
| Alejandro Silva | Alejandro Silva | — | (760) 698 7068 | Electricians | Coachella · Riverside County | — | — |
| Aleman Builders INC | Perez Mauricio Aleman | — | (951) 772 4528 | GC, remodel, ADU | Banning · Riverside County | — | — |
| Aleman Electric | Jose Carmen Aleman | — | (760) 668 1298 | Electricians | Thousand Palms · Riverside County | — | — |
| Alex Andaya | Alex Andaya | — | (951) 565 1756 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Alex Electric | Takacs Sandor | — | (951) 833 0906 | Electricians | Banning · Riverside County | — | — |
| Alex Hdz Electric INC | Alejandro Wenceslao Hernandez | — | (951) 288 9162 | Electricians | Corona · Riverside County | — | — |
| Alex Landscaping | Alex Landscaping | — | (562) 326 6914 | Windows, patio, painters | Perris · Riverside County | — | — |
| Alex Sanchez-valencia | Alex Sanchez-valencia | — | (714) 496 7029 | Other | Corona · Riverside County | — | — |
| Alex The Glass Man | Alex The Glass Man | — | (714) 883 4638 | Windows, patio, painters | Corona · Riverside County | — | — |
| Alex Welding INC | Reynaga Alejandro Perez | — | (562) 279 4515 | Other | Riverside · Riverside County | — | — |
| Alex Woods | Alex Woods | info@alexwoods.photography | (714) 625 7071 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Alex's Tree Services INC | Nelson Alexis Chicas Montano | — | (760) 609 1114 | Tree | Coachella · Riverside County | — | — |
| Alexander J Keefe Painting | Alexander J Keefe Painting | — | (760) 391 2924 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Alexander Pacific Electrical Contractors INC | David Thomas Alexander | — | (951) 296 5835 | Electricians | Temecula · Riverside County | — | — |
| Alexander Painting And Design | Alexander Ivan Serrano | — | (323) 309 5789 | Windows, patio, painters | Corona · Riverside County | — | — |
| Alexander Remodeling INC | David Eugene Iii Alexander | lemonad@jovanny.ru | (951) 415 0119 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Alexander Roofing | Sean Christopher Alexander | — | (951) 692 1553 | Other roofers | Hemet · Riverside County | — | — |
| Alexander Vasquez | Alexander Vasquez | — | (951) 575 5555 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Alexander Veliskakis | Alexander Veliskakis | — | (907) 440 5576 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Alexanders Construction Services | James Jay Alexander | — | (951) 201 2564 | GC, remodel, ADU | Idyllwild · Riverside County | — | — |