| Superstruction INC | John Richard Lieb | bigdirtpile@gmail.com | (415) 606 4500 | GC, remodel, ADU | Alta · Placer County | — | — |
| Supreme Contractors INC | Ben Lashchuk | — | (916) 430 8350 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sure - Clean | Sure - Clean | — | (530) 887 1980 | Windows, patio, painters | Auburn · Placer County | — | — |
| Sureway Construction Company | Clark Parmo Blowers | — | (916) 771 3011 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Surface Experts Sacramento East LLC | Ian Scott Frogner | — | (916) 717 8009 | Other | Lincoln · Placer County | — | — |
| Surveillance Audio Video INC | Robert Grijalva | — | (408) 340 3601 | Other | Lincoln · Placer County | — | — |
| Surveillance Systems Integration INC | Michael Todd Flowers | — | (800) 508 6981 | Other | Rocklin · Placer County | — | — |
| Sutherland Property Management Inc. | Sutherland Property Management Inc. | suthprop@pacbell.net | (530) 885-0664 | Property managers | Auburn · Placer County | — | — |
| Sv Design Build INC | Nicholas Grady Sullivan | — | (530) 305 8166 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sve Electric Technology INC | Barry Thys | — | (530) 412 2109 | Electricians | Olympic Valley · Placer County | — | — |
| Svistun Construction | Anatoliy Nicoluivich Svistun | — | (916) 871 3615 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| Swc Roofing | Erik Christopher Schultz | — | (916) 462 1700 | Other roofers | Roseville · Placer County | — | — |
| Swenbilt Homes | Swenbilt Homes | — | (760) 505 5929 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Swift Construction | Ralph Mitchell Swift | joe@swift-construction.com | (916) 747 5255 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Swihart Electrical Group INC | Christian Andrew Swihart | — | (916) 246 9956 | Electricians | Loomis · Placer County | — | — |
| Swihart Enterprises & Electrical | Christian Andrew Swihart | — | (530) 308 3274 | Electricians | Loomis · Placer County | — | — |
| Swinnpro Renovations | Swinnpro Renovations | — | (916) 220 8535 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Swppking INC | Gerald Ray Montgomery | — | (916) 216 7744 | Other | Roseville · Placer County | — | — |
| Synergy Pools INC | Jaime Jr Chavez | — | (530) 350 9024 | Pool | Granite Bay · Placer County | — | — |
| Systems Tech INC | Michael George Martin | hello@systemstech.com | (310) 679-2281 | Other | Rocklin · Placer County | — | — |
| T & A Cabinets | Otoniel C Ortiz | — | (916) 745 9922 | Other | Roseville · Placer County | — | — |
| T & C Builders | T & C Builders | — | (231) 883-6223 | GC, remodel, ADU | Olympic Valley · Placer County | — | — |
| T & M Custom Concrete INC | Michael John Homen | — | (916) 390 2245 | Other | Granite Bay · Placer County | — | — |
| T & T Builders | T & T Builders | — | (530) 218 5233 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T 'n' T Construction | John Marshall Maberry | — | (916) 202 2060 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T A R C O | T A R C O | — | (916) 747 0507 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T B C Construction INC | Thomas Bradley Calhoun | — | (916) 997 0385 | GC, remodel, ADU | Loomis · Placer County | — | — |
| T B Construction | Morgan Troy Bolen | — | (916) 878 0706 | GC, remodel, ADU | Roseville · Placer County | — | — |
| T C Arthur Construction | Thomas Craig Arthur | — | (530) 320 0581 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T D Builders | T D Builders | — | (530) 448 2199 | GC, remodel, ADU | Tahoma · Placer County | — | — |
| T E C Project Builders INC | James H Amioka | — | (623) 326 5304 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| T J Glidden Construction | Trevor James Glidden | — | (530) 581 4000 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| T M Electric | Thomas Benedict Mulholland | employment@tmelectric.com | (916) 532 3220 | Electricians | Roseville · Placer County | — | — |
| T M G Builders | T M G Builders | — | (916) 676 6571 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T M W Craftsman INC DBA California Craftsman | Michele Marie Wells | — | (530) 887 1857 | GC, remodel, ADU | Auburn · Placer County | — | — |
| T N T Construction | Trent Nathan Thavenet | — | (916) 759 3723 | GC, remodel, ADU | Gold Run · Placer County | — | — |
| T P A Construction INC | Pavel Anatol'yevic Tyukayev | — | (916) 919 1624 | GC, remodel, ADU | Roseville · Placer County | — | — |
| T R C Electrical | Alexander Evan Morgan | alexm@trcelectrical.com | (530) 613 7870 | Electricians | Colfax · Placer County | — | — |
| T R Plumbing | Robert Allen Sr Redfern | kenny@trplumbing.com | (530) 613 6988 | Other | Auburn · Placer County | — | — |
| T S Clark General Contractor | T S Clark General Contractor | — | (916) 201 5328 | GC, remodel, ADU | Colfax · Placer County | — | — |