| All Cities Fiberglass | All Cities Fiberglass | — | (209) 786 2078 | Other | Linden · San Joaquin County | — | — |
| All Construction Trades INC | Gabriel Galletta | — | (209) 430 6011 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| All Floor Works | All Floor Works | estimating@allfloorworks.com | (408) 910 2450 | Other | Tracy · San Joaquin County | — | — |
| All HVAC Systems LLC | Suarez Ernesto | allhvacsystemsllc@gmail.com | (209) 562-5940 | HVAC | Tracy · San Joaquin County | — | — |
| All Powered INC | Matthew Ray Meyer | — | (209) 996 1905 | Electricians | Stockton · San Joaquin County | — | — |
| All Pro Handyman Masonry | All Pro Handyman Masonry | — | (209) 650 5957 | Other | Tracy · San Joaquin County | — | — |
| All Refrigeration Solutions | All Refrigeration Solutions | — | (209) 331 0211 | HVAC | Lodi · San Joaquin County | — | — |
| All Repairs & Painting | All Repairs & Painting | — | (510) 921 4755 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| All Season Lawn Landscaping | All Season Lawn Landscaping | — | (209) 838 1934 | Windows, patio, painters | Escalon · San Joaquin County | — | — |
| All Seasons Pool Service | Mark Joesph Hickey | — | (209) 329 2757 | Pool | Lodi · San Joaquin County | — | — |
| All Service Plumbing | Justin Andrew Navarro | — | (209) 373 6365 | Other | Manteca · San Joaquin County | — | — |
| All Star Plumbing | All Star Plumbing | — | (209) 840 1933 | Other | Manteca · San Joaquin County | — | — |
| All Steel Fence INC | Thomas Eugene Iii Cornell | — | (209) 983 8409 | Other | Lathrop · San Joaquin County | — | — |
| All Surface Painting & Construction INC | Kimberly Nell Pflug | — | (209) 951 8412 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| All Systems Approved INC | Edgar Antonio Hernandez | — | (510) 292 9976 | Other | Tracy · San Joaquin County | — | — |
| All Time Electric | Steve Joseph Iii Bosrock | — | (925) 325 6720 | Electricians | Tracy · San Joaquin County | — | — |
| All Weather Roofing Company INC | Marlin Craig Kjelaas | — | (209) 474 0258 | Other roofers | Stockton · San Joaquin County | — | — |
| Allan's Painting & Decorating | Allan's Painting & Decorating | — | (209) 931 0501 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Allegiant Co LLC | Evan Raymond Holloway | — | (209) 597 0631 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Allegiant Roofing Systems | Ramiro Ramirez Rodriguez | — | (408) 426 7685 | Other roofers | Tracy · San Joaquin County | — | — |
| Allen A Waggoner Construction INC | Oxley | — | (209) 599 8788 | Other | Ripon · San Joaquin County | — | — |
| Allen Campbell Woodworking | Allen Campbell Woodworking | — | (209) 610 9345 | Other | Linden · San Joaquin County | — | — |
| Alliance Heating & Air | Alliance Heating & Air | — | (209) 915 2676 | HVAC | Manteca · San Joaquin County | — | — |
| Allied Tile & Stone INC | Michael David Fernandes | — | (209) 474 8453 | Other | Stockton · San Joaquin County | — | — |
| Allinnova Design & Remodeling | Allinnova Design & Remodeling | — | (408) 775 1417 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Allman Painting | Allman Painting | — | (209) 570 1056 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Allstate Tile & Stone | Allstate Tile & Stone | — | (209) 403 6885 | Other | Lodi · San Joaquin County | — | — |
| Alov Landscaping | Alov Landscaping | — | (209) 559 4931 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Alpha Omega | Joevon Lynn Barnes | — | (888) 222 3998 | Other | Lodi · San Joaquin County | — | — |
| Alpine Drywall | Alpine Drywall | — | (209) 603 8273 | Other | Lodi · San Joaquin County | — | — |
| Alpine Electric | Dannie Albert Silva | — | (209) 570 1993 | Electricians | Victor · San Joaquin County | — | — |
| Alpine Fire Protection INC | Jorge Jaime | — | (209) 941 4025 | Other | Stockton · San Joaquin County | — | — |
| Alricks Steel INC | Jason William Mayer | — | (209) 369 1035 | Other | Lodi · San Joaquin County | — | — |
| Alrob Building Services | John Robert Galbraith | — | (510) 908 5305 | Electricians | Stockton · San Joaquin County | — | — |
| Als Builders INC | Luis Rogelio Alcaraz Santana | — | (209) 200 6701 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Altamont Electric INC | Javier Giovanni Galvan | ycharitou@altamontelectric.com | (209) 855 1847 | Electricians | Tracy · San Joaquin County | — | — |
| Altamont Fire Protection LLC | Aaron Jason Juarez | operations@premierfire.org | (925) 281 5100 | Electricians | Manteca · San Joaquin County | — | — |
| Altamont Rebar Corp | Leoz Braulio | — | (925) 579 1200 | Other | Tracy · San Joaquin County | — | — |
| Alternativa Electrical Services | Romero Franklin | anapbm@gmail.com | (510) 386 7582 | Electricians | Manteca · San Joaquin County | — | — |
| Alva Construction | Alvarado Jose | — | (209) 774 6323 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |