| Armair HVAC Services | Shahinyan Samvel | — | (714) 552 1610 | HVAC | Laguna Hills · Orange County | — | — |
| Armand M Rainville | Armand M Rainville | — | (714) 235 2898 | Windows, patio, painters | Anaheim · Orange County | — | — |
| Armando Alcantara | Armando Alcantara | — | (714) 501 9054 | Other | Huntington Beach · Orange County | — | — |
| Armanie Builders INC | Alvin Francisco Armanie | armaniebuilders.inc@gmail.com | (949) 355 1026 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Arme Design Build | Arme Design Build | contact@armedesignbuild.com | (949) 778 2288 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Armen Kayekjian | Armen Kayekjian | — | (949) 241 2433 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Armes Electric INC | Peter Eliot Armes | armeselectric@gmail.com | (949) 855 9814 | Electricians | Laguna Hills · Orange County | — | — |
| Armin LLC | Kayhan| Akrami_ Mehr Mohammad Kayhan Akrami | — | (800) 461 2608 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Armor Electrical Services INC | Brandon Scott Lochridge | — | (714) 674 0443 | Electricians | Brea · Orange County | — | — |
| Armor Fence Concepts INC | Lara Christine Craig | — | (949) 632 1206 | Other | Laguna Hills · Orange County | — | — |
| Armor Glass Tinting | Armor Glass Tinting | — | (310) 488 5626 | Other | Brea · Orange County | — | — |
| Armor Vac Corp | Doug Brian Shipway | — | (714) 839 4386 | Other | Fountain Valley · Orange County | — | — |
| Armora Construction & Painting | Moreno Arsenio | — | (949) 290 3428 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| Armorcentric INC | Seton Jee Seto | — | (877) 714 0800 | Other | Anaheim · Orange County | — | — |
| Armour Built Construction | Brandon Michael Armour | — | (714) 605 8284 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Armstrong Building Company | Trevor Hyland Armstrong | interested@domainmarket.com | (949) 293 2682 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Armstrong Cal Builders INC | Imad Eric Othman | sal@armstrongcalbuilders.com | (657) 571 8607 | Electricians | Stanton · Orange County | — | — |
| Armstrong Home Property Solutions | Armstrong Home Property Solutions | — | (951) 377 0401 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Arnaz Engineering Contractors INC | Alireza Yazdanshenas | — | (714) 666 1765 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Arnold Air Systems | Arnold Air Systems | — | (714) 315 6177 | HVAC | Brea · Orange County | — | — |
| Arnold Arsenault Jr | Arnold Arsenault Jr | — | (714) 801 3023 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Arnold Builders | Arnold Builders | — | (714) 381 3555 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Arnulfo Munoz | Arnulfo Munoz | — | (562) 533 0661 | Tree | La Habra · Orange County | — | — |
| Aro Pool Builders Innovations INC | Alejandro Romero-Ocampo | — | (714) 597 2792 | Pool | Santa Ana · Orange County | — | — |
| Arod Flooring INC | Alejandro Rodriguez | — | (951) 251 2333 | Other | Westminster · Orange County | — | — |
| Arois Renovations | Sanchez Omar | — | (714) 552 5107 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Around The Castle Landscape Design INC | Ryan Alan Moat | — | (714) 270 8308 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Arqova Construction | Andre Farzin Afshar | business@arqova.co | (949) 876 1231 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Arrash Saidi | Arrash Saidi | — | (949) 554 7062 | Other | Irvine · Orange County | — | — |
| Arratia's Floor Company | Walter Vladimir Arratia | — | (714) 936 3801 | Other | La Habra · Orange County | — | — |
| Arren Mendoza | Arren Mendoza | — | (714) 913 0140 | GC, remodel, ADU | Orange · Orange County | — | — |
| Arris Builders INC | David Noel Bruce Ii Kuhn | info@arrisbuilders.com | (949) 261 3113 | GC, remodel, ADU | Ladera Ranch · Orange County | — | — |
| Arrizon Electrical Installations | Arrizon Gabriel | — | (714) 818 2537 | Electricians | Costa Mesa · Orange County | — | — |
| Arrow Electric Construction Services INC | Vincent Morales | — | (714) 632 9890 | Electricians | Anaheim · Orange County | — | — |
| Arrow General Contractors | Agreda Romulo | — | (714) 366 4968 | Electricians | Yorba Linda · Orange County | — | — |
| Arrow Plumbing & Drain Cleaning INC | Jose Refugio Casillas Mora | — | (949) 531 1992 | Other | Costa Mesa · Orange County | — | — |
| Arrow Plumbing Services INC | Jose Refugio Sr Casillas-Mora | — | (949) 922 4380 | Other | Costa Mesa · Orange County | — | — |
| Arroyo Electric | Arroyo Xavier | — | (949) 295 3106 | Electricians | Yorba Linda · Orange County | — | — |
| Arroyo Landscaping | Arroyo Landscaping | — | (714) 851 0105 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| Ars Concrete Restoration INC | Alan Ricardo Samano | — | (714) 766 2205 | Restoration | Garden Grove · Orange County | — | — |