| Arrow Stripe INC | Jason Bradley Reich | — | (209) 662 0090 | Other | Woodbridge · San Joaquin County | — | — |
| Arrowhead Concrete Construction | Matthew Tomas Zepeda | — | (209) 400 1942 | Other | Acampo · San Joaquin County | — | — |
| Arroyos General Construction | Arroyo Felipe | — | (209) 200 0821 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Art Meza Construction | Arturo Jr Meza | — | (408) 655 9909 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Art's Roofing | Ruiz Jaramillo Arturo | — | (209) 659 3072 | Other roofers | Manteca · San Joaquin County | — | — |
| Arteaga's Construction | Alvaro Ugalde Arteaga | — | (620) 655 1381 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Arterior Construction | Mohamed Ahmed Eldabaany | — | (408) 858 7736 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Artificial Turf Pro | Elias J Duenas | sales@artificial-turf-pro.com | (209) 430-7318 | Other | Stockton · San Joaquin County | — | — |
| Artisan Electrical & HVAC INC | Mark Duwayne Toothman | — | (510) 571 9300 | HVAC | Tracy · San Joaquin County | — | — |
| Artisanal Tile Choice Co | Carlos Fernando Aguilar | — | (510) 921 7053 | Other | Stockton · San Joaquin County | — | — |
| Artistic Stone Works INC | Gregory Allen Baroni | — | (209) 369 6449 | Other | Lodi · San Joaquin County | — | — |
| Artistic Stoneworks & Tile Concepts | Artistic Stoneworks & Tile Concepts | — | (209) 597 9475 | Other | Manteca · San Joaquin County | — | — |
| Artistic Tiles | Artistic Tiles | — | (510) 909 7051 | Other | Stockton · San Joaquin County | — | — |
| Artworks Hardwood Floors | Artworks Hardwood Floors | — | (925) 209 9637 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Arvin Home Systems INC | Arvin Lavern Reed | — | (209) 823 3565 | Electricians | Manteca · San Joaquin County | — | — |
| Asad Jafri | Asad Jafri | — | (248) 703 2182 | GC, remodel, ADU | Mountain House · San Joaquin County | — | — |
| Asandoval Concrete INC | Sandoval Guardado Alvaro | — | (408) 591 1368 | Other | Manteca · San Joaquin County | — | — |
| Asphalt Kings INC | Pedro Cortes | — | (510) 860 8819 | Other | Stockton · San Joaquin County | — | — |
| Astral Electrical Contractor | Pablo Alberto Mendoza | — | (408) 772 0303 | Electricians | Mountain House · San Joaquin County | — | — |
| Atlantis Pool & Spa LLC | Gregory Edward May | — | (209) 689 1361 | Pool | Stockton · San Joaquin County | — | — |
| Atlas Concrete Polish INC | Adan Jurado | impallari@gmail.com | (209) 673 2661 | Other | Stockton · San Joaquin County | — | — |
| Atlas Construction & Plumbing INC | Maria G Orozco-Rios | — | (510) 796 1388 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Atlas Marble & Granite | David Hernandez | — | (510) 501 0021 | Other | Tracy · San Joaquin County | — | — |
| Atlas Property Repair | Atlas Property Repair | atlasjm@gmail.com | (209) 810 5383 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Atp Painting Services INC | Arturo Luis Yniguez | ahamedoli1506@gmail.com | (209) 451 8014 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Attic Repair Guys INC | Sayed Qayome Hashimi | atticrepairguys@gmail.com | (415) 737-9844 | Other | Manteca · San Joaquin County | — | — |
| Auriga Technology LLC | James Edward Nunes | — | (510) 764 6700 | Other | Escalon · San Joaquin County | — | — |
| Austin Logan Petero | Austin Logan Petero | — | (209) 412 2228 | Other | Escalon · San Joaquin County | — | — |
| Authentic Hardwood Floors | Gonzalez Andres Cruz | — | (650) 679 3032 | Other | Tracy · San Joaquin County | — | — |
| Automatic Gates And Access | Automatic Gates And Access | — | (510) 677 0784 | Other | Tracy · San Joaquin County | — | — |
| Automation And Control Solutions | John Joseph Kestyus | — | (209) 931 1760 | Electricians | Stockton · San Joaquin County | — | — |
| Ava Fire Protection INC | Arturo Javier Aleman Lena | jaleman@avafireprotection.com | (209) 629 5097 | Other | Manteca · San Joaquin County | — | — |
| Ava Siding Specialists INC | Jesus Antonio Picos Acosta | admin@ava-constructioninc.com | (510) 760 7850 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Avalon Builders | Avalon Builders | — | (209) 406 8343 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Avalon Roofing Services INC | Jerry Benjamin Garcia | — | (209) 380 1275 | Other roofers | Manteca · San Joaquin County | — | — |
| Avalon Savoy INC | Roger Allen Heyl | — | (209) 612 0587 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Avalos Gardening | Avalos Gardening | — | (209) 470 0520 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Avanti Properties | Daniel Edward Nunes | — | (209) 471 4538 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Ave Maria Plumbing | Ave Maria Plumbing | — | (209) 518 0350 | Other | Stockton · San Joaquin County | — | — |
| Avery Plumbing | Avery Plumbing | — | (209) 990 6317 | Other | Escalon · San Joaquin County | — | — |