| Ab Concrete Company Corporation | Abad Juarez-Ceja | — | (909) 756 3837 | Other | Riverside · Riverside County | — | — |
| Ab Concrete INC | Abraham Sr Gonzalez | — | (951) 570 9502 | Other | Perris · Riverside County | — | — |
| Ab Contracting | Austin James Burnard | — | (951) 581 3032 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Ab Remodelers INC | Pablo Eduardo Alvarez | — | (909) 627 9640 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Abacherli Engineering INC | Frank Steven Abacherli | — | (951) 323 0716 | Other | Mira Loma · Riverside County | — | — |
| Abarca Construction INC | Andrew Manuel Abarca | — | (760) 766 5088 | GC, remodel, ADU | Bermuda Dunes · Riverside County | — | — |
| Abarca Landscape Company | Anthony Samuel Avarca | anthony@abarcalandscape.com | (951) 223-6009 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Abatti Construction | Joseph John Abatti | — | (951) 514 1340 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Abbott's Automatic Garage Doors INC | Victor Alberto Urias | — | (951) 926 4199 | Other | Hemet · Riverside County | — | — |
| Abboud Diamond Construction INC | Johnny Chafic Abboud | — | (909) 335 4866 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Abc Window Systems | Daniel Arnold Schwartz | — | (909) 946 3697 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Abe Flooring | Abe Flooring | — | (858) 405 0586 | Other | Murrieta · Riverside County | — | — |
| Abe's Plumbing Services INC | Abraham M Orduno | — | (760) 272 9096 | Other | Desert Hot Springs · Riverside County | — | — |
| Abel Martinez DBA The Plumbing Co | Martinez Abel | — | (310) 629 1917 | Other | Lake Elsinore · Riverside County | — | — |
| Abel Rodriguez | Abel Rodriguez | — | (760) 848 3580 | Windows, patio, painters | Indio · Riverside County | — | — |
| Abel's Gardening & Landscaping | Abel's Gardening & Landscaping | — | (760) 899 4186 | Windows, patio, painters | Indio · Riverside County | — | — |
| Abel's Pools | Figueroa Donis Abel | abelspools@yahoo.com | (760) 272 6741 | Pool | Cathedral City · Riverside County | — | — |
| Abella Technologies INC | Hernan Alonzo Abella | — | (949) 338 6984 | Other | Riverside · Riverside County | — | — |
| Abguizar Plumbing | Abguizar Plumbing | — | (442) 264 3323 | Other | Mecca · Riverside County | — | — |
| Ability Network & Telephone INC | Tracey Kent Morell | — | (951) 492 1289 | Other | Hemet · Riverside County | — | — |
| Abiu Plumbing INC | Jose Luis Figueroa Martinez | — | (951) 261 4622 | Other | Banning · Riverside County | — | — |
| Able Sprinkler Corporation | Chester John Jr Malinowski | — | (951) 675 7401 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Above & Beyond Painting | Above & Beyond Painting | — | (951) 603 4298 | Windows, patio, painters | Wildomar · Riverside County | — | — |
| Above All Construction INC | James Norman Eggleston | — | (951) 742 7156 | Other roofers | Riverside · Riverside County | — | — |
| Above All Landscape Company | Catalan Mario Velez | — | (714) 400 1838 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Above All Roofing | Jacob Ryan Escarcega | — | (951) 609 0246 | Other roofers | Wildomar · Riverside County | — | — |
| Above And Beyond Drains & Plumbing INC | Jose Luis Jr Garcia | — | (951) 483 4046 | Other | Menifee · Riverside County | — | — |
| Above It All Painting | Above It All Painting | — | (760) 880 6096 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| Above Of All Heating And Air Conditioning INC | Loren Ernest Jr Pharris | — | (951) 660 4242 | HVAC | Murrieta · Riverside County | — | — |
| Above The Rest Commercial Flooring INC | Fernando Gonzalez | — | (619) 852 0441 | Other | Murrieta · Riverside County | — | — |
| Above The Rest Specialties INC | Richard Arthur Valadez | — | (951) 524 8111 | Other | Banning · Riverside County | — | — |
| Abracadabra Garage Door Company | Albert Allen Hershey | — | (760) 345 4413 | Other | Bermuda Dunes · Riverside County | — | — |
| Abraham Tirado Cueva / Cueva Construction | Abraham Tirado Cueva | — | (714) 504 4002 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Abram's Finish Work | Abram's Finish Work | — | (951) 768 1532 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Abs Construction | Silvestre Mojica Covarrubias | — | (714) 931 2510 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Absolute Air Conditioning & Heating | Absolute Air Conditioning & Heating | absoluteairconditioningheating@gmail.com | (760) 318 5541 | HVAC | Palm Desert · Riverside County | — | — |
| Absolute Cabinets INC | Brett Adam Rossi | — | (800) 214 2238 | HVAC | Beaumont · Riverside County | — | — |
| Absolute Construction LLC | Luis Nicolas Del Valle | — | (951) 990 7384 | Other | Moreno Valley · Riverside County | — | — |
| Absolute Electric Services INC | Jason Reed Swearengin | — | (760) 535 6237 | Electricians | Rancho Mirage · Riverside County | — | — |
| Absolute Garage Doors | Absolute Garage Doors | — | (951) 343 2999 | Other | Riverside · Riverside County | — | — |