| Aramexx Construction | Salim Salvador Samour | — | (909) 933 0327 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Arandas Stone Expo | Arandas Stone Expo | — | (626) 225 5553 | Other | Moreno Valley · Riverside County | — | — |
| Arbol Roble Landscaping Services | Hernandez Erick Quiroz | — | (909) 667 5840 | Windows, patio, painters | Eastvale · Riverside County | — | — |
| Arbor & Bloom Landscape Design | Adrian Alvarado-Cortez | — | (760) 702 5419 | Windows, patio, painters | Indio · Riverside County | — | — |
| Arbor Landscape Services | Deanna Lee Galindo | — | (760) 322 2234 | Windows, patio, painters | Palm Springs · Riverside County | — | — |
| Arbor Mobile Home Services | Donald Lynn Bradford | — | (760) 345 1876 | Other | Thousand Palms · Riverside County | — | — |
| Arborquest Tree Service INC | John Peter Laan | — | (951) 926 6059 | Tree | Temecula · Riverside County | — | — |
| Arc Electric | Michael Paul Parisi | — | (714) 224 6271 | Electricians | Murrieta · Riverside County | — | — |
| Arc Form Development | Blake Richard Stein | — | (760) 397 7817 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Arcbuilding INC | Ricardo Hallak | — | (949) 561 2550 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Arce Electric | Francisco Jr Arce | lugo@arceelectric.com | (951) 723 0789 | Electricians | Menifee · Riverside County | — | — |
| Arce Jesus Masonry | Arce Jesus Masonry | — | (760) 905 8357 | Other | Desert Hot Springs · Riverside County | — | — |
| Arce Painting | Arce Painting | — | (951) 420 1462 | Windows, patio, painters | Perris · Riverside County | — | — |
| Archangel Design And Construction INC | Hector Federico Zubieta | — | (951) 252 7707 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Archer Construction | Dale Arthur Archer | — | (951) 704 5114 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Archie's Electric INC | Cindy Marie Foster | — | (626) 523 7578 | Electricians | Norco · Riverside County | — | — |
| Architectural Concrete Innovations INC DBA Advanced Concrete | Daniel Garcia Garibaldo | — | (760) 848 8617 | Other | Cathedral City · Riverside County | — | — |
| Architectural Design & Signs INC | Milton Solomon | — | (951) 278 0680 | Other | Corona · Riverside County | — | — |
| Architectural Glazing | Architectural Glazing | — | (760) 671 4264 | GC, remodel, ADU | North Palm Springs · Riverside County | — | — |
| Architectural Plaster LLC | Cole Wesley Herman | — | (805) 680 2085 | Other | Palm Springs · Riverside County | — | — |
| Architectural Sign Identity INC | Michael Ray Mccomas | — | (951) 654 4350 | Other | San Jacinto · Riverside County | — | — |
| Architectural Woodworking | Architectural Woodworking | — | (951) 961 0298 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Archuleta Concrete Construction Co | Tommy Legarreta Jr Archuleta | — | (760) 345 8722 | Other | Bermuda Dunes · Riverside County | — | — |
| Archuleta Excavating INC | Robert Miera Archuleta | — | (760) 347 6155 | Other | Indio · Riverside County | — | — |
| Arcline Electric | Hugo Cesar Gorecki | — | (951) 425 3115 | Electricians | San Jacinto · Riverside County | — | — |
| Arco's Pool Service LLC | Nora Irene Arcos | — | (760) 898 3223 | Pool | Desert Hot Springs · Riverside County | — | — |
| Ardent Electrical Service | George Oliver Smith | — | (951) 496 1983 | Electricians | Eastvale · Riverside County | — | — |
| Ares Landscaping | Salgado Raul Martinez | areslandscapingcv@aol.com | (760) 391 8497 | Windows, patio, painters | Coachella · Riverside County | — | — |
| Arete Development Consulting Engineering INC | Gregory Alan Mendoza | — | (951) 847 5233 | Other | Riverside · Riverside County | — | — |
| Arfan Air Conditioning And Heating Co | Muhammad Arfan Ashraf | — | (626) 823 5297 | HVAC | Moreno Valley · Riverside County | — | — |
| Arfi Ornamental Metal | Jose Genaro Araujo Olivares | — | (951) 292 1409 | Other | San Jacinto · Riverside County | — | — |
| Arias Elite Construction Corp | Monico Arias | — | (951) 901 5723 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Arias Mechanical Corporation | Louie Alberto Arias | — | (619) 339 9222 | HVAC | Canyon Lake · Riverside County | — | — |
| Arias Plumbing | Arias Plumbing | — | (714) 920 4271 | Other | Perris · Riverside County | — | — |
| Arias The Painter LLC | Jorge Ivan Arias Reinoso | — | (951) 269 8639 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Arias Tile | Arias Tile | — | (951) 965 5348 | Other | San Jacinto · Riverside County | — | — |
| Arid Technologies | Jose Luis Gutierrez | — | (760) 578 2398 | Other | Indio · Riverside County | — | — |
| Arise Construction INC | Young Boo Jeon | info@arise-construction.com | (714) 397 7074 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| Arizona Pipeline Company | Thomas Ray Searls | — | (760) 244 8212 | Electricians | Corona · Riverside County | — | — |
| Ark Group Construction Division | Olguin Rafael Herrera | — | (951) 334 8901 | GC, remodel, ADU | Riverside · Riverside County | — | — |