| A Careaga Plumbing | A Careaga Plumbing | — | (818) 612 2509 | Other | Burbank · Los Angeles County | — | — |
| A Caro Construction Company INC | Caro Abel | anapbm@gmail.com | (530) 318 0793 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| A Cavalli Construction INC | Adam Michael Cavalli | — | (805) 252 9999 | GC, remodel, ADU | Carpinteria · Santa Barbara County | — | — |
| A Ceballos Painting LLC | Ceballos Alejandro | alejandro@aceballospainting.com | (209) 420 8464 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| A Celtic Craftsman Builders | A Celtic Craftsman Builders | — | (209) 459 2936 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| A Cervantes Landscaping | Vital Adrian Cervantes | — | (424) 571 1864 | Windows, patio, painters | Gardena · Los Angeles County | — | — |
| A Checkered Flag Construction | Velazquez Antwine | — | (619) 995 3199 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| A Christian Glass And Mirror | A Christian Glass And Mirror | amkryukov@gmail.com | (510) 725 8498 | Windows, patio, painters | Newark · Alameda County | — | — |
| A Cisneros Painting | Alvarez Antonio Cisneros | — | (916) 496 0575 | Windows, patio, painters | W Sacramento · Yolo County | — | — |
| A Clas Builders & Design INC | Samuel Malmazada | — | (310) 261 4500 | GC, remodel, ADU | Calabasas · Los Angeles County | — | — |
| A Class Construction | Stephen Patrick Henderson | — | (805) 757 2488 | GC, remodel, ADU | Santa Maria · Santa Barbara County | — | — |
| A Class Floor & Tile | A Class Floor & Tile | — | (909) 800 2946 | Other | Big Bear Lake · San Bernardino County | — | — |
| A Class Plumbing Corp | Levon Gevorkovich Avoyan | — | (818) 237 0720 | Other | Sun Valley · Los Angeles County | — | — |
| A Classic Brush | A Classic Brush | — | (415) 706 9997 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| A Classic Contractor | A Classic Contractor | — | (408) 499 5338 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| A Cleaning Company Limited Liability Co | Mark Alan Kennard | — | (916) 308 5124 | Other | Gold River · Sacramento County | — | — |
| A Clear Choice Pool And Spa Services INC | Lance Edward Sada | — | (951) 591 4900 | Pool | Menifee · Riverside County | — | — |
| A Clear Choice Sand And Water Blasting | Scott Alan Belnap | — | (714) 287 9555 | Other | San Clemente · Orange County | — | — |
| A Climate Control | A Climate Control | — | (707) 816 1776 | HVAC | Vacaville · Solano County | — | — |
| A Coat Above Painting | A Coat Above Painting | — | (415) 710 5467 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| A Coleman Builders | A Coleman Builders | — | (760) 774 4163 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| A Colmenero Plastering INC | Augustine Joseph Jr Colmenero | — | (559) 435 3606 | Other | Fresno · Fresno County | — | — |
| A Complete Drywall Company | Michael Blake Mayock | — | (415) 456 9306 | Other | San Rafael · Marin County | — | — |
| A Concrete Company | Brian Lee Gilmore | — | (760) 264 5806 | Other | Bishop · Inyo County | — | — |
| A Construction Co | Ricardo Josafat Colin Castillo | — | (408) 784 2345 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| A Construction Group INC | Amir Hasson | — | (818) 888 5667 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| A Cool Air INC | Angelina Kalinin | — | (916) 879 7288 | HVAC | Sacramento · Sacramento County | — | — |
| A Cool Services INC | Ronen Mihael Smelchanskiy | — | (818) 881 4126 | HVAC | West Hills · Los Angeles County | — | — |
| A Cool Space | A Cool Space | — | (951) 337 2471 | HVAC | Moreno Valley · Riverside County | — | — |
| A Cortez Framing | A Cortez Framing | — | (760) 571 7130 | Other | San Marcos · San Diego County | — | — |
| A Craft Plumbing INC | Artur Oliver Gukasi | — | (818) 721 7543 | Other | Burbank · Los Angeles County | — | — |
| A Craftsman Finishing Touch | A Craftsman Finishing Touch | — | (626) 590 7797 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| A Custom Touch | A Custom Touch | interested@domainmarket.com | (209) 617 6878 | GC, remodel, ADU | Atwater · Merced County | — | — |
| A Cut Above | A Cut Above | — | (279) 277 1144 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| A Cut Above | A Cut Above | — | (530) 864 7448 | Other | Chico · Butte County | — | — |
| A Cut Above Builders INC | David Preston Burchard | — | (925) 817 8231 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| A Cut Above Building & Developing INC | Julia Louise Dowell | — | (626) 665 3016 | GC, remodel, ADU | Irwindale · Los Angeles County | — | — |
| A Cut Above Concrete Cutting | Gregory Dennis Walker | — | (661) 800 8844 | Other | Bakersfield · Kern County | — | — |
| A Cut Above Concrete Cutting INC | Paul Brian Lewis | — | (619) 248 5874 | Other | Lakeside · San Diego County | — | — |
| A Cut Above Construction | Kyle Daniel Plotz | — | (925) 784 5294 | GC, remodel, ADU | Livermore · Alameda County | — | — |