| A R Wilson Electric | Andrew Robert Wilson | — | (310) 570 5613 | Electricians | Santa Monica · Los Angeles County | — | — |
| A R Y Construction & Marketing INC | Yardeny Avraham | — | (310) 613 2569 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A Rack Company | Omar Alejandro Sanchez Perez | — | (818) 858 6379 | Other | Victorville · San Bernardino County | — | — |
| A Ramirez Heating And Plumbing | A Ramirez Heating And Plumbing | — | (831) 899 1554 | HVAC | Seaside · Monterey County | — | — |
| A Ramos Construction INC | Ramos-avila Agapito | — | (925) 766 7960 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| A Ravella Construction And Engineering | Andrew Joseph Ravella | — | (650) 483 7356 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| A Reemdy Rooter & Plumbing INC | Arlene Bacio March | — | (951) 272 8966 | Other | Corona · Riverside County | — | — |
| A Regal Finish Construction | Silverio Tony Gutierrez | — | (619) 756 4633 | Other | San Diego · San Diego County | — | — |
| A Reliable Garage Doors | A Reliable Garage Doors | — | (619) 742 6687 | Other | Lemon Grove · San Diego County | — | — |
| A Reliable Painter INC | Martinez Jenniffer | — | (714) 397 6171 | Windows, patio, painters | Garden Grove · Orange County | — | — |
| A Reliable Plumbing LLC | Manuel Jesus Arellano | — | (559) 229 7354 | Other | Fresno · Fresno County | — | — |
| A Reliance Communication Company | Dartagnan Michael Dueball | — | (951) 675 0783 | Other | Moreno Valley · Riverside County | — | — |
| A Revitalized Bath And Kitchen A R Bath And Kitchen | Geoffrey Tyler Marsh | — | (619) 644 3320 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| A Reyes Construction INC | Delgado Alfredo Reyes | — | (510) 778 5648 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| A Reynoso Construction Company | Alfonso Jr Reynoso | — | (909) 625 6906 | GC, remodel, ADU | Claremont · Los Angeles County | — | — |
| A Ricky Roofing | Pablo Diego Sanchez | — | (408) 991 3363 | Other roofers | Hayward · Alameda County | — | — |
| A Righini Electric INC | Anthony Joseph Righini | — | (916) 832 2443 | Electricians | Folsom · Sacramento County | — | — |
| A Rivada General Construction | Arville De Guzman Rivada | — | (714) 397 7939 | GC, remodel, ADU | Orange · Orange County | — | — |
| A Rivas Plumbing INC | Adrian Alejandro Rivas | — | (949) 498 3727 | Other | San Clemente · Orange County | — | — |
| A Rizon Construction | Antonio Zafra Rizon | — | (408) 460 4308 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A Robledo Construction General Engineering INC | Robledo Alvaro | — | (707) 492 9508 | Other | Fairfield · Solano County | — | — |
| A Rod Construction | Alex Gabriel Rodriguez | — | (209) 200 1683 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| A Rod Landscaping | A Rod Landscaping | — | (559) 305 2850 | Windows, patio, painters | Fresno · Fresno County | — | — |
| A Rod Plumbing | A Rod Plumbing | — | (619) 361 3403 | Other | Chula Vista · San Diego County | — | — |
| A Rodriguez Const | A Rodriguez Const | — | (559) 679 9404 | GC, remodel, ADU | Springville · Tulare County | — | — |
| A Rodriguez Electric | Alen Naun Rodriguez Flores | — | (415) 910 8529 | Electricians | Hayward · Alameda County | — | — |
| A Rojas Construction INC | Jose Alejandro Rojas Moreno | — | (916) 218 9635 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| A Romero Fence | A Romero Fence | — | (209) 610 3206 | Other | Stockton · San Joaquin County | — | — |
| A Rooter-man Plumbing Sewer & Drain Cleaning Service INC | Ralph Anthony Rowe | — | (530) 582 1213 | Other | Truckee · Nevada County | — | — |
| A Rose Plumbing INC | Fremont Scott Rose | — | (209) 586 1002 | Other | Twain Harte · Tuolumne County | — | — |
| A Rover Electric INC | P M Marsden | roverelectric@gmail.com | (858) 232 7107 | Electricians | La Jolla · San Diego County | — | — |
| A Ruiz Construction Co & Assoc INC | Antonio Ruiz | — | (415) 647 4010 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| A Rynders Electric & Refrigeration | Andries John Rijnders | — | (714) 422 8144 | HVAC | Buena Park · Orange County | — | — |
| A S A F Garage Doors Repair INC | Steren Asaf | — | (818) 602 3126 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A S A P Asphalt | A S A P Asphalt | interested@domainmarket.com | (408) 687 0385 | Other | San Jose · Santa Clara County | — | — |
| A S A P Builders | A S A P Builders | — | (858) 208 7429 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A S A P Cabinets | A S A P Cabinets | — | (530) 865 3918 | Other | Orland · Glenn County | — | — |
| A S A P Construction | Julio Cesar Martinez | — | (415) 730 5997 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A S A P Construction | Cary David Snyder | — | (949) 510 0105 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| A S A P Construction Services | Edward John Luboff | — | (818) 388 1441 | GC, remodel, ADU | Tujunga · Los Angeles County | — | — |