| S R Armstrong Enterprise | S R Armstrong Enterprise | — | (530) 524 3489 | GC, remodel, ADU | Shingletown · Shasta County | — | — |
| S T Rhoades Construction Incorporated | Steve Tyler Rhoades | — | (530) 223 9322 | Other | Redding · Shasta County | — | — |
| S W Painting | S W Painting | — | (530) 524 6461 | Windows, patio, painters | Redding · Shasta County | — | — |
| Saavy Builders INC | Mathew Ryan Saavedra | — | (530) 945 9931 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Sabers Construction Co | Jeffrey Eugene Sabers | — | (530) 949 6996 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Saeteurn Concrete Construction | Sou Chiem Saeteurn | — | (530) 440 8615 | Other | Shasta Lake · Shasta County | — | — |
| Safe Roads Dvbe | Safe Roads Dvbe | — | (530) 276 5179 | Other | Palo Cedro · Shasta County | — | — |
| Safestreets | Safestreets | customerconcerns@safestreets.com | (855) 891-7233 | Alarm and generators | Redding · Shasta County | — | — |
| Salmon Creek Construction INC | Wesley Alan Stuckey | — | (530) 338 8960 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Sam Nisly | Sam Nisly | — | (530) 782 0665 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Sam Smith | Sam Smith | — | (707) 495 1931 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| San Diego Sash Company | San Diego Sash Company | — | (619) 749-1591 | Windows, patio, painters | El Cajon · Shasta County | — | — |
| Sass Fence INC | Nicholas Timothy Sass | — | (530) 703 7222 | Other | Redding · Shasta County | — | — |
| Scared Of Heights Construction | Cody Reyes Perales | — | (530) 355 6781 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Schnetzer Engineering INC | Donald Darrell Schnetzer | — | (530) 241 8460 | Other | Redding · Shasta County | — | — |
| Schuler Plumbing INC | Martin Fredrick Schuler | — | (530) 221 5223 | Other | Bella Vista · Shasta County | — | — |
| Schuppert Excavating | Schuppert Excavating | — | (530) 604 9500 | Other | Anderson · Shasta County | — | — |
| Scot Louis Glarson | Scot Louis Glarson | — | (530) 515 6802 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Scott A Miller Contracting | Scott Alan Miller | — | (530) 524 5930 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Scott A Reeves DBA Sar Construction | Scott Allen Reeves | — | (530) 243 0974 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Scott Acoustics INC | Jon Scott Bachelder | — | (510) 440 0953 | Other | Anderson · Shasta County | — | — |
| Scott D Mc Clurg Professional Installations | Scott Dean Mc Clurg | — | (707) 499 5809 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Scott Herndon Construction | Scott Carl Herndon | — | (530) 241 3098 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Scott Nedved Construction | Scott Edward Nedved | — | (530) 941 0633 | GC, remodel, ADU | Burney · Shasta County | — | — |
| Scott Stewart | Scott Stewart | — | (530) 941 5445 | Other | Shasta Lake · Shasta County | — | — |
| Scott's Custom Cabinets | Scott's Custom Cabinets | — | (707) 382 6553 | Other | Redding · Shasta County | — | — |
| Scott's Garage Door Services | Scott M Fujimoto | info@scottsgaragedoorservices.com | (530) 492 4829 | Other | Redding · Shasta County | — | — |
| Scott's Guaranteed Glass | Scott's Guaranteed Glass | — | (530) 335 4527 | Windows, patio, painters | Burney · Shasta County | — | — |
| Scotts Construction Solutions | Robert Scott Hinzman | — | (916) 532 7133 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| Scotts Plumbing | Scotts Plumbing | — | (530) 727 7927 | Other | Cottonwood · Shasta County | — | — |
| Sean Coleman Tile | Sean Coleman Tile | — | (530) 227 5931 | Other | Redding · Shasta County | — | — |
| See Clear Pools | See Clear Pools | — | (530) 510 9995 | Pool | Shasta Lake · Shasta County | — | — |
| Seidel Construction | Shane William Seidel | — | (206) 334 3204 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Self-help Home Improvement Project | Christopher Daniel Heath | — | (530) 378 6900 | HVAC | Redding · Shasta County | — | — |
| Sergio Soto Garcia | Sergio Soto Garcia | — | (530) 209 8261 | Other | Redding · Shasta County | — | — |
| Sergio's Lath & Plaster | Sergio's Lath & Plaster | — | (530) 262 9253 | Other | Redding · Shasta County | — | — |
| Serna Concrete INC | Antonio Serna | — | (530) 319 9215 | Other | Cottonwood · Shasta County | — | — |
| Service 1 Heating & Air Conditioning | James Eugene Stillman | — | (530) 921 6149 | HVAC | Redding · Shasta County | — | — |
| Setpoint Refrigeration | Boone Curtis Johnson | — | (530) 355 3588 | HVAC | Cottonwood · Shasta County | — | — |
| Shade Sisters | Amanda Diane Hastings | — | (530) 356 5446 | Other | Redding · Shasta County | — | — |