| Active Drilling & Pump Supply | Active Drilling & Pump Supply | — | (951) 926 1254 | Other | Hemet · Riverside County | — | — |
| Active Drywall Solutions | Active Drywall Solutions | eglen@cossdrywallinc.com | (619) 710 7281 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Active Electric And Home Improvements | Vargas Jose | — | (661) 340 7773 | Electricians | Bakersfield · Kern County | — | — |
| Active Elevator INC | Dennis Demarco | — | (818) 701 7213 | Other | Chatsworth · Los Angeles County | — | — |
| Active Endeavor INC | Dirk Alexander Cahaan | guy@infinitydesignbuild.com | (619) 913 4852 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| Active Framing INC | Marquez Javier | activeframing@gmail.com | (760) 213 8112 | Other | Escondido · San Diego County | — | — |
| Active Garage Door Services | Abdel Maher Ismail | — | (805) 279 9677 | Other | Moorpark · Ventura County | — | — |
| Active Glass Co | Stephen Robert Santillan | — | (323) 890 8166 | Windows, patio, painters | Azusa · Los Angeles County | — | — |
| Active Global Protection | Active Global Protection | — | (800) 747-9069 | Alarm and generators | Chatsworth · Lassen County | — | — |
| Active Home Construction INC | Hakop Telalian | — | (747) 888 1551 | GC, remodel, ADU | Panorama City · Los Angeles County | — | — |
| Active Industrial Contracting INC | Anne Marie Frost | — | (209) 634 5659 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Active Integration | Joshua Anthony E Silva | — | (408) 840 3736 | Other | Gilroy · Santa Clara County | — | — |
| Active Leak Detection & Plumbing LLC | Cortez Hugo | — | (805) 656 3999 | Other | Oxnard · Ventura County | — | — |
| Active Lock And Safe | Active Lock And Safe | — | (949) 859 4530 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Active Painting | Active Painting | — | (209) 565 7776 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Active Plumbing & Rooter | Active Plumbing & Rooter | — | (510) 200 2497 | Other | Fremont · Alameda County | — | — |
| Active Plumbing & Rooter INC | Scott Wesley Douglas | — | (800) 970 2577 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Active Power Solutions | Active Power Solutions | — | (818) 661 8287 | Electricians | Temecula · Riverside County | — | — |
| Active Project Development INC | Anatoliy Petrovich Davidov | contact@apdwindows.com | (916) 698 3329 | GC, remodel, ADU | Antelope · Sacramento County | — | — |
| Active Remodeling | Active Remodeling | — | (209) 242 3131 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Active Restoration | Kevin Lee Stout | — | (949) 408 0988 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Active Restoration Construction | Robert Frederick Guedea | — | (951) 833 7866 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Active Roofing INC | Ivan De Jesus Ramirez | info@active-roofing.com | (310) 408 4940 | Other roofers | Wilmington · Los Angeles County | — | — |
| Active Rooter And Plumber INC | Harutyun Sargisovich Torosyan | — | (818) 930 0300 | Other | Granada Hills · Los Angeles County | — | — |
| Active Sandblasting Company | Steven Scott Wilson | — | (626) 287 0749 | Other | San Gabriel · Los Angeles County | — | — |
| Active Scaffold | Juan Carlos Romero | active.scaffolding@hotmail.co.uk | (415) 912 7454 | Other | San Francisco · San Francisco County | — | — |
| Active Sheet Metal INC | Clayton Robert Johnson | — | (951) 549 9711 | Other | Corona · Riverside County | — | — |
| Active Sign Company | James Scott Chakos | — | (619) 962 8615 | Other | Coronado · San Diego County | — | — |
| Active Systems INC | Mark Edward Dagui | — | (949) 240 8255 | Other | Capistrano Beach · Orange County | — | — |
| Active Telecommunications Group INC | Colonel Hal Joseph Garcia | — | (909) 541 5852 | Other | Claremont · Los Angeles County | — | — |
| Active Temp INC | Terrence Keith Jr Scranton | — | (909) 204 0054 | HVAC | Fontana · San Bernardino County | — | — |
| Active Wire Tech INC | Christopher Robin Haynes | — | (951) 675 7074 | Electricians | Chino · San Bernardino County | — | — |
| Activeconcretecutting | Juan Martell Macias | — | (714) 709 9872 | Other | Lake Elsinore · Riverside County | — | — |
| Activia Electric | Tade Aghakian | — | (818) 220 2287 | Electricians | Burbank · Los Angeles County | — | — |
| Actnet Advanced Technology Corporation | Julie Yi Zhou | — | (415) 661 9000 | Other | San Francisco · San Francisco County | — | — |
| Acton Arboriculture INC | Zeno Ata Acton | — | (530) 272 8224 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Acton Construction | Wayne Trenwith Acton | — | (707) 337 2181 | GC, remodel, ADU | Esparto · Yolo County | — | — |
| Acton Construction INC | Stanley Scott Acton | — | (408) 369 1103 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| Acton Electric | Lorin Richard Jundy | — | (661) 212 2640 | Electricians | Acton · Los Angeles County | — | — |
| Acts Fire Protection LLC | Austreberto Murillo | — | (916) 513 5011 | Other | Galt · Sacramento County | — | — |