| Advanced Security Systems | Advanced Security Systems | — | (707) 464-1975 | Alarm and generators | Crescent City · Mendocino County | — | — |
| Advanced Septic Solutions | Todd Allen Robinson | interested@domainmarket.com | (805) 440 3348 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Advanced Septic Systems LLC | Marc Paul Barbani | interested@domainmarket.com | (619) 689 1836 | Other | La Mesa · San Diego County | — | — |
| Advanced Shotcrete INC | Edgar Manuel Cardenas | — | (661) 273 0644 | Other | Lancaster · Los Angeles County | — | — |
| Advanced Sign & Banner | Yushea Joher Surti | — | (818) 346 2142 | Other | Chatsworth · Los Angeles County | — | — |
| Advanced Sign Contractors INC | Troy Dexter Jr Morris | — | (661) 392 1037 | Other | Bakersfield · Kern County | — | — |
| Advanced Sign Tech INC | Glen H Kim | — | (323) 488 0238 | Other | Commerce · Los Angeles County | — | — |
| Advanced Signs By Nick | Advanced Signs By Nick | — | (661) 723 4880 | Other | Lancaster · Los Angeles County | — | — |
| Advanced Smart Solutions INC | John Christopher Cranston | — | (916) 285 5048 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Advanced Soil Technology And Engineering | Raul Escobedo Felix | — | (661) 472 7281 | Other | Bakersfield · Kern County | — | — |
| Advanced Solutions & Services INC DBA Advanced Plumbing Heating | Danielle Nicole Fontaine | — | (707) 446 1800 | HVAC | Vacaville · Solano County | — | — |
| Advanced Solutions Heating And Air Conditioning INC | Bruce David Williams | — | (650) 347 4328 | HVAC | San Mateo · San Mateo County | — | — |
| Advanced Spa Repair | Advanced Spa Repair | — | (619) 490 5581 | Pool | La Mesa · San Diego County | — | — |
| Advanced Sprinkler And Drainage Repair | John Fitzgerald Moriarty | — | (858) 573 0842 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Advanced Steel Fabrication INC | Garry Julian Hanson | blog@painting.com | (831) 758 5457 | Other | Salinas · Monterey County | — | — |
| Advanced Stormwater Protection INC | Marilyn Leona Geney | — | (707) 953 8903 | Other | Santa Rosa · Sonoma County | — | — |
| Advanced Surfaces INC | Pedro Torres Medina | — | (714) 635 0949 | Other | Buena Park · Orange County | — | — |
| Advanced Sweeping Services INC | Romulo Augusto Boggio | — | (909) 350 3952 | Other | Fontana · San Bernardino County | — | — |
| Advanced Synthetix | Dominic John Baldacchino | — | (916) 479 8549 | Other | Folsom · Sacramento County | — | — |
| Advanced System Integrator | Advanced System Integrator | — | (909) 268 2361 | Other | Fontana · San Bernardino County | — | — |
| Advanced Systems Company | Michael David Workman | — | (760) 779 1352 | Other | San Clemente · Orange County | — | — |
| Advanced Systems Services INC | Tammy Leryse Wigington | — | (909) 949 9944 | HVAC | Upland · San Bernardino County | — | — |
| Advanced T I INC | Joseph Allen Standridge | — | (925) 299 0515 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Advanced Tankless And Plumbing | Advanced Tankless And Plumbing | — | (909) 977 1365 | Other | Diamond Bar · Los Angeles County | — | — |
| Advanced Tech 209 INC | Hassem Mohammad Samara | — | (209) 888 4944 | HVAC | Stockton · San Joaquin County | — | — |
| Advanced Tech Air Systems INC | Richard Ruiz | — | (310) 878 3759 | HVAC | Granada Hills · Los Angeles County | — | — |
| Advanced Technical HVAC | Advanced Technical HVAC | advancedtechnicalhvac@gmail.com | (650) 222 0925 | HVAC | Milpitas · Santa Clara County | — | — |
| Advanced Technologies Audio Video INC | Michael Garrett Mc Ginity | — | (760) 345 1457 | Other | Bermuda Dunes · Riverside County | — | — |
| Advanced Technology Distributors INC | James Alan Lawson | — | (209) 541 1111 | Other | Ceres · Stanislaus County | — | — |
| Advanced Technology INC | Alfonso Estrada | — | (626) 453 8955 | Electricians | Ontario · San Bernardino County | — | — |
| Advanced Technology Ventures INC | Pedro Eduardo Garcia | — | (559) 395 3317 | Other | Madera · Madera County | — | — |
| Advanced Tectonics | Richard Joseph Dever | — | (424) 210 9900 | GC, remodel, ADU | San Pedro · Los Angeles County | — | — |
| Advanced Tile | Advanced Tile | — | (916) 997 6249 | Other | Rancho Cordova · Sacramento County | — | — |
| Advanced Tile | Advanced Tile | — | (619) 318 9334 | Other | San Diego · San Diego County | — | — |
| Advanced Tile And Marble | Advanced Tile And Marble | — | (408) 461 0851 | Other | Hollister · San Benito County | — | — |
| Advanced Tile Innovations | Advanced Tile Innovations | advancedtileinnovations@yahoo.com | (408) 612 9946 | Other | Hollister · San Benito County | — | — |
| Advanced Tile Restoration | David Loraine Jr Rhodes | — | (925) 474 2334 | Restoration | Dublin · Alameda County | — | — |
| Advanced Tile Work & More | Andrey Shvets | — | (916) 225 9004 | Other | Orangevale · Sacramento County | — | — |
| Advanced Tree Care | Advanced Tree Care | steve@sovinteractive.com | (661) 444 2903 | Tree | Bakersfield · Kern County | — | — |
| Advanced Tree Care | Advanced Tree Care | steve@sovinteractive.com | — | Tree | San Mateo · San Mateo County | — | — |