| S E A Construction | Steven Eric Atwood | — | (209) 985 8812 | GC, remodel, ADU | La Grange · Stanislaus County | — | — |
| S G Remodeling Pro | S G Remodeling Pro | — | (408) 747 7654 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| S Haro Construction | Steffen Miles Haro | — | (209) 380 0376 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| S J Company | Justin Kelly Spence | — | (209) 521 8181 | Other roofers | Modesto · Stanislaus County | — | — |
| S J Metal Tec | S J Metal Tec | — | (209) 480 6747 | Other | Modesto · Stanislaus County | — | — |
| S M V Concrete INC | Marquez Sergio Davila | — | (209) 284 9429 | Other | Modesto · Stanislaus County | — | — |
| S Manu Creations | S Manu Creations | — | (310) 415 2195 | Other | Modesto · Stanislaus County | — | — |
| S Q Roofing INC | Arzola Roberto Romero | — | (209) 605 9913 | Other roofers | Ceres · Stanislaus County | — | — |
| S4 Ground Works LLC | Bryan Mathew Sousa | — | (209) 740 5071 | Other | Salida · Stanislaus County | — | — |
| Sabio Innovation Group LLC DBA Sig Landscape | Fidencio Israel Hernandez | — | (209) 703 9410 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Safe - T - Lite Of Modesto INC | Alicia Ann White | — | (209) 522 8913 | Other | Modesto · Stanislaus County | — | — |
| Safeguard Electric | Michael Anthony Jacobs | darianweaver@safeguard-electric.com | (702) 557 7467 | Electricians | Modesto · Stanislaus County | — | — |
| Sagebrush Cable Engineering | William Edwin Mc Dermott | — | (209) 327 8365 | Other | Modesto · Stanislaus County | — | — |
| Saguaro Builders INC | Gregg Steven Smith | — | (209) 204 2847 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Sahagun Plumbing LLC | Sahagun-velasco Abrahan | — | (650) 776 5240 | Other | Salida · Stanislaus County | — | — |
| Sahner Construction | Joshua Eric Sahner | info@sahnerconstruction.com | (209) 809 6281 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Sal's Construction Company | Gutierrez Salvador | — | (209) 495 7242 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Sal's Plumbing Service | Salvador Mario Lopez | sals.plumbing@yahoo.com | (209) 565 7715 | Other | Turlock · Stanislaus County | — | — |
| Salas John Pool's | Salas John Pool's | — | (209) 424 7638 | Pool | Modesto · Stanislaus County | — | — |
| Salazar Concrete INC | John Daniel Salazar | — | (209) 667 5681 | Other | Turlock · Stanislaus County | — | — |
| Salvador Corona Plumbing INC | Salvador Coneche Corona | — | (209) 613 0700 | Other | Ceres · Stanislaus County | — | — |
| Salvador Garza | Salvador Garza | — | (209) 312 6647 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Sam Bordens Mobile Home Service | Samuel Harmon Borden | — | (209) 652 6889 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Sam Farias Fencing INC | Juan Samuel Farias | psfarias@comcast.net | (209) 345-1984 | Other | Modesto · Stanislaus County | — | — |
| Samsonbilt LLC | Robert Fredick Miska | — | (916) 216 0074 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Samuel John Camarda | Samuel John Camarda | — | (209) 765 4747 | Other | Salida · Stanislaus County | — | — |
| San Diego Pool Solutions | San Diego Pool Solutions | — | (858) 243-3385 | Pool | Escondido · Stanislaus County | — | — |
| San Joaquin Valley Mobile Homes | Robert Oda Jr Yohanan | — | (209) 632 0854 | Other | Ceres · Stanislaus County | — | — |
| San Leandro Painting & Roofing Co | Harry Calvin Jr Kintzer | — | (510) 798 9674 | Other roofers | Modesto · Stanislaus County | — | — |
| Sanders Construction | Bruce Donald Sanders | — | (209) 985 8103 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Sandoval Industrial Electric | Sandoval Gerardo | — | (209) 996 4546 | Electricians | Modesto · Stanislaus County | — | — |
| Sanh Le Construction | Sanh Van Le | — | (209) 447 7733 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Santa Fe Landscapers INC | Olga Ochoa | — | (209) 241 1716 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| Santacruz Painting | Santacruz Painting | — | (209) 409 5573 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Santiago Electric INC | Hector Santiago | — | (209) 985 8888 | Electricians | Riverbank · Stanislaus County | — | — |
| Santiago Ramirez | Santiago Ramirez | — | (209) 408 4507 | Electricians | Empire · Stanislaus County | — | — |
| Santos Industrial | Santos Industrial | eben@eyebytes.com | (209) 634 5524 | Other | Turlock · Stanislaus County | — | — |
| Sashi Singh | Sashi Singh | — | (209) 581 4437 | Electricians | Modesto · Stanislaus County | — | — |
| Saunco Air Technologies A Div Of Reed International | Doug Richard Hogue | — | (209) 874 2357 | HVAC | Hickman · Stanislaus County | — | — |
| Saunders Air Conditioning & Heating | Kristy Kay Falke | — | (209) 634 9313 | HVAC | Turlock · Stanislaus County | — | — |