| A C H Remodel | A C H Remodel | — | (209) 815 1133 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A C Painting | A C Painting | — | (209) 938 7175 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| A C R Construction | Anthony Joseph Ricketts | — | (209) 915 1988 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| A C Services | Alberth Jhony Melgar Melgar | — | (209) 321 0428 | HVAC | Tracy · San Joaquin County | — | — |
| A Ceballos Painting LLC | Ceballos Alejandro | alejandro@aceballospainting.com | (209) 420 8464 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| A D Construction | Rodrigo A Ramirez | amkryukov@gmail.com | (209) 629 9670 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A E I Plumbing | A E I Plumbing | — | (209) 471 8281 | Other | Stockton · San Joaquin County | — | — |
| A F I Construction | Antonio Franco Inocencio | — | (209) 835 9702 | Other | Tracy · San Joaquin County | — | — |
| A G 7 Tile Natural Stone INC | Jose De Jesus Aguirre | — | (650) 722 0444 | Other | Tracy · San Joaquin County | — | — |
| A G Painting Services | Maya Ariana Griffin | — | (408) 850 3002 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| A G Spanos Construction INC | Steven Lawrence Cohen | — | (209) 478 7954 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| A G Wright Construction | Anthony Gregory Wright | — | (209) 362 5598 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| A H Fencing | A H Fencing | — | (209) 430 9787 | Other | Victor · San Joaquin County | — | — |
| A I S INC | Michael Patrick Lavelle | — | (925) 455 1800 | Other | Tracy · San Joaquin County | — | — |
| A J Building Specialties | Thomas James Himes | — | (209) 922 3342 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| A J Russo Construction | Andrew John Russo | — | (831) 224 9988 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| A M Backhoe | A M Backhoe | — | (209) 597 5363 | Other | Tracy · San Joaquin County | — | — |
| A M S Heating INC | Arthur Dean Sanders | — | (209) 466 6692 | HVAC | Stockton · San Joaquin County | — | — |
| A M Stephens Concrete INC | Gina Sherene Ostlund | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A M Stephens Construction Co INC | Jennifer Lynn Cairns | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A One Hoe Rental | Dennis Jay Letteer | — | (510) 760 2695 | Other | Manteca · San Joaquin County | — | — |
| A Plus Electrical | Steven Viet Lieu | — | (408) 207 3817 | Electricians | Tracy · San Joaquin County | — | — |
| A R J And Son Construction INC | Allan Rodger Jackson | — | (650) 906 0641 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A Rizon Construction | Antonio Zafra Rizon | — | (408) 460 4308 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A Rod Construction | Alex Gabriel Rodriguez | — | (209) 200 1683 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| A Romero Fence | A Romero Fence | — | (209) 610 3206 | Other | Stockton · San Joaquin County | — | — |
| A S A P Electric | Rick Daryl Carlson | archie@asapelectric.com | (209) 339 1417 | Electricians | Stockton · San Joaquin County | — | — |
| A S Electric | Aaron David Stroud | — | (209) 810 6530 | Electricians | Lodi · San Joaquin County | — | — |
| A S H Building Solutions | A S H Building Solutions | — | (209) 200 6406 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| A Touch Of Stone And Tile | Shad Shokralla | — | (650) 787 6255 | Other | Manteca · San Joaquin County | — | — |
| A W Construction | Aaron Carl Wilkerson | — | (209) 810 0987 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| A W Manufacturing Specialist INC | Michael Eugene Petrunt | — | (209) 931 6805 | Other | Stockton · San Joaquin County | — | — |
| A West Concrete Specialist | A West Concrete Specialist | — | (510) 385 3064 | Other | Tracy · San Joaquin County | — | — |
| A&e Installations INC DBA Cruz Glazing | Cruz Alberto Amador | — | (510) 379 6277 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| A's Drywall INC | Mario Anaya | estimating@asdrywall.com | (209) 229 1986 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| A-1 Plumbing Company | Barragan Francisco Chavez | — | (209) 430 2730 | Other | Stockton · San Joaquin County | — | — |
| A-cal Trim INC | Michael Wayne Stallings | — | (209) 479 9737 | GC, remodel, ADU | Woodbridge · San Joaquin County | — | — |
| A-team Renovations Corp | Hector Alejandro Castillo Gonzalez | — | (408) 202 0318 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| A-team Specialized Services Corp DBA K2 Home Services | Cresencio Lomas | — | (925) 667 8547 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| A.l.s Construction & Home Repair Inc. | Ouida Eraine Reed | — | (209) 334 9414 | Other roofers | Lodi · San Joaquin County | — | — |