| S R G Windows INC | Steven Ray Gould | — | (209) 814 2946 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| S R Quality Painting | S R Quality Painting | — | (800) 551 2188 | Windows, patio, painters | Lathrop · San Joaquin County | — | — |
| S2 Power Systems | S2 Power Systems | — | (209) 623 5191 | Electricians | Stockton · San Joaquin County | — | — |
| Sa Construction | Ahmed Sajjad | — | (209) 471 7254 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Saavedra Builders LLC | Jorge A Saavedra | — | (510) 734 6349 | GC, remodel, ADU | Lathrop · San Joaquin County | — | — |
| Saechao Electrics | Saechao Electrics | — | (510) 689 6113 | Electricians | Stockton · San Joaquin County | — | — |
| Salazar Landscape Management | Salazar Landscape Management | — | (209) 810 3974 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Salco Garden Services Landscaper Unlimited | Serna Salvador | — | (209) 834 0594 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Salman Qadir | Salman Qadir | — | (510) 909 7101 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Sam Drogo DBA Drogo Construction | Drogo Samuel | — | (209) 484 6137 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Sambrano's Masonry | Sambrano's Masonry | — | (209) 456 6312 | Other | Manteca · San Joaquin County | — | — |
| Sambranos Custom Concrete | Sambranos Custom Concrete | — | (209) 624 6632 | Other | Manteca · San Joaquin County | — | — |
| Sameday Backflow Service INC | Joseph Robert Sr Reyes | — | (209) 986 3569 | Other | Manteca · San Joaquin County | — | — |
| Samuel King | Samuel King | — | (510) 936 3721 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| San Diego Home & Building Inspec | San Diego Home & Building Inspec | — | (858) 344-7250 | Inspectors | Carlsbad · San Joaquin County | — | — |
| San Dieguito Pool Center | San Dieguito Pool Center | — | (760) 747-5668 | Pool | Escondido · San Joaquin County | — | — |
| San Joaquin Building | San Joaquin Building | — | (209) 608 0123 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| San Joaquin Construction Services | San Joaquin Construction Services | — | (661) 499-1200 | Other roofers | Bakersfield · San Joaquin County | — | — |
| San Joaquin County Property Management | San Joaquin County Property Management | — | (209) 468-0310 | Property managers | Stockton · San Joaquin County | — | — |
| San Joaquin Drywall INC | Oscar Wayne Jackson | — | (209) 477 5441 | GC, remodel, ADU | Lockeford · San Joaquin County | — | — |
| San Joaquin Electric INC | Douglas Wilbur Talbert | info@sanjoaquinelectric.com | (209) 952 9980 | Electricians | Stockton · San Joaquin County | — | — |
| San Joaquin Hills Electricians | San Joaquin Hills Electricians | — | (949) 535-0075 | Electricians | Newport Beach · San Joaquin County | — | — |
| San Joaquin Pest Control Of Hanford | San Joaquin Pest Control Of Hanford | info@sjpcvisalia.com | (559) 648-8438 | Pest, tile roofs | Hanford · San Joaquin County | — | — |
| San Joaquin Steel Co INC | Thomas Levin Burch | — | (209) 948 0541 | Other | Stockton · San Joaquin County | — | — |
| San Patricio Construction INC | Gloria Aranda Cullen | — | (915) 487 2325 | GC, remodel, ADU | Farmington · San Joaquin County | — | — |
| Sanchez Building Services | Maria Lourdes Sanchez | — | (510) 776 4873 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Sanchez Construction | Mark Escobar Sanchez | — | (209) 969 9842 | GC, remodel, ADU | Acampo · San Joaquin County | — | — |
| Sanchez Landscaping Services | Sanchez Diego | — | (209) 229 3076 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Sand Cave Construction INC | Ricardo Vazquez | sandcavecon@gmail.com | (408) 561 6093 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Sandoval Construction | Robert Adolpho Sandoval | — | (209) 366 2257 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Sandoval Fence Lathrop INC | Christopher Lee Sandoval | — | (209) 858 5762 | Other | Lathrop · San Joaquin County | — | — |
| Sandoval Landscape | Sandoval Landscape | — | (209) 923 3690 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Santana's Painting And Decorating | Santana's Painting And Decorating | — | (209) 368 6168 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Santiago Tree Service | Guillermo Santiago | — | (925) 864 2941 | Tree | Stockton · San Joaquin County | — | — |
| Santini's Landscaping & Maintenance | Santini's Landscaping & Maintenance | — | (209) 942 0439 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Santos Plumbing | Santos Plumbing | — | (510) 760 7759 | Other | Tracy · San Joaquin County | — | — |
| Sargents Plumbing | Sargents Plumbing | — | (916) 201 8342 | Other | Tracy · San Joaquin County | — | — |
| Sarmento Bros Construction INC | Justin Ryan Sarmento | sarmentobrosconstruction@gmail.com | (209) 637 7379 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Saxon Builders INC | Walid Sardarmohammad | — | (209) 637 0782 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Sb Flooring INC | Becerra Saul | — | (209) 607 0812 | Other | Stockton · San Joaquin County | — | — |