| Advanced Tree Care And Consulting INC | Robert Howard Weatherill | — | (650) 839 9539 | Tree | San Carlos · San Mateo County | — | — |
| Advanced Tree Care Services | Jeffrey Ray Newrider | — | (916) 224 4736 | Tree | Rio Linda · Sacramento County | — | — |
| Advanced Trenchless INC | Ryan Matthew Charles | — | (925) 932 4023 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Advanced Underground Systems | Advanced Underground Systems | — | (951) 634 7628 | Other | Riverside · Riverside County | — | — |
| Advanced Utilities INC | Michael Patrick Wegener | — | (916) 640 0600 | Other | Sacramento · Sacramento County | — | — |
| Advanced Vacuum Plumbing Systems | Advanced Vacuum Plumbing Systems | — | (909) 772 4322 | Other | Pinon Hills · San Bernardino County | — | — |
| Advanced Voice & Data INC | Scott Alan Levine | — | (925) 681 2800 | Other | Concord · Contra Costa County | — | — |
| Advanced Volume Management LLC | Vijay Hirabhai Patel | — | (650) 520 5259 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Advanced Wallcovering | Advanced Wallcovering | — | (805) 570 5134 | GC, remodel, ADU | Santa Ynez · Santa Barbara County | — | — |
| Advanced Water & Power | Advanced Water & Power | — | (909) 274 0377 | Electricians | Claremont · Los Angeles County | — | — |
| Advanced Water Products | Adli Khalid Rasheed | — | (510) 979 9590 | Other | Livermore · Alameda County | — | — |
| Advanced Water Pump Services | Jesse Lawrence Cunningham-lyon | advancedwaterpumpservices@gmail.com | (530) 575 1048 | Other | Chico · Butte County | — | — |
| Advanced Water Solutions INC | Jay James Hellenbrand | contact@advancedwatersolutions.com | (805) 385 4740 | Other | Oxnard · Ventura County | — | — |
| Advanced Water Treatment Specialists | Ricardo Arguellez | ricardo.awts@gmail.com | (760) 623-2821 | Other | Brawley · Imperial County | — | — |
| Advanced Water Well Drilling & Pump Services | William Chester Houck | — | (925) 785 2015 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Advanced Weld Design | Advanced Weld Design | — | (916) 591 3498 | Other | Citrus Heights · Sacramento County | — | — |
| Advanced Welding And Fabrication INC | Juan Carlos Yanez Saldivar | — | (559) 837 0609 | Other | Tulare · Tulare County | — | — |
| Advanced Welding Service | Martinez Daniel | — | (916) 662 4006 | Other | Orangevale · Sacramento County | — | — |
| Advanced Welding Services LLC | Jesus E Villarreal | — | (661) 621 2777 | Other | San Diego · San Diego County | — | — |
| Advanced Welding Systems LLC | Carlos Lopez Adauto | — | (805) 637 1803 | Other | Santa Barbara · Santa Barbara County | — | — |
| Advanced Weldtec INC | George Tracy Rolla | — | (951) 536 3809 | Other | Lake Elsinore · Riverside County | — | — |
| Advanced West Coast Welding | Advanced West Coast Welding | — | (661) 373 1471 | Other | Canyon Country · Los Angeles County | — | — |
| Advanced Wildfire Protection | Birch Wellington Pender | — | (661) 400 0219 | GC, remodel, ADU | Palmdale · Los Angeles County | — | — |
| Advanced Window | Advanced Window | advancedwindowinc@gmail.com | (760) 751 2000 | Windows, patio, painters | Valley Center · San Diego County | — | — |
| Advanced Window Systems | Advanced Window Systems | don@aws650.com | (650) 591 5253 | Windows, patio, painters | Belmont · San Mateo County | — | — |
| Advanced Window Tinting | Advanced Window Tinting | — | (530) 343 4500 | Other | Chico · Butte County | — | — |
| Advanced Window Wholesale INC DBA The Glass Wizard | Shantidas Virji Kanji | — | (805) 983 3600 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Advanced Windows | Advanced Windows | — | (916) 459 0430 | Windows, patio, painters | Elk Grove · Sacramento County | — | — |
| Advanced Wireless | Karen Elizabeth Rudnick | — | (805) 922 2252 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Advanced Woodwork Tool And Supply INC | Philip Nikolich | — | (760) 610 2771 | Other | Palm Desert · Riverside County | — | — |
| Advancederosion Services Corp | Armando Lovera Pena | — | (951) 929 8780 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Advancedgeo INC | Robert Dixon Loeffler | — | (800) 511 9300 | Other | Stockton · San Joaquin County | — | — |
| Advancing Communities Together | David Barron Woodman | — | (661) 266 8900 | GC, remodel, ADU | Palmdale · Los Angeles County | — | — |
| Advanco Fire Protection INC | Rigoberto Bustamante Vazquez | — | (909) 460 2510 | Other | Ontario · San Bernardino County | — | — |
| Advaned Polhesar Lighting | Advaned Polhesar Lighting | — | (310) 500 0589 | Electricians | Winnetka · Los Angeles County | — | — |
| Advanta Clean Of Central Valley | Christopher Michael Craparo | — | (209) 830 1399 | Other | Tracy · San Joaquin County | — | — |
| Advantaclean | Advantaclean | — | (877) 800-2382 | Restoration | San Diego · San Diego County | — | — |
| Advantage Air | Milan Kumar Chawla | — | (800) 709 7297 | HVAC | Long Beach · Los Angeles County | — | — |
| Advantage Air Conditioning | Advantage Air Conditioning | — | (951) 301 0231 | HVAC | Menifee · Riverside County | — | — |
| Advantage Appliance Service | Walid Rashid Khamis | steved@precision-ac.com | (619) 698 6100 | HVAC | La Mesa · San Diego County | — | — |