| Roadrunner Drilling & Pump Company INC | Jim Lane Brookshire | — | (530) 406 8559 | Other | Woodland · Yolo County | — | — |
| Robert S Gallagher | Robert S Gallagher | — | (530) 662 4781 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Rod Construction | Steven Rodriguez | — | (916) 372 5434 | Other | West Sacramento · Yolo County | — | — |
| Rodriguez & Sons Concrete Construction INC | Gustavo Rodriguez | — | (530) 908 6362 | Other | Dunnigan · Yolo County | — | — |
| Rodriguez Decking Crete | Leslie Yarid Gonzalez Madrigal | — | (530) 908 7629 | Other | Woodland · Yolo County | — | — |
| Rokni Construction And Development | Hamid Shahriar Rokni | — | (530) 400 5427 | GC, remodel, ADU | Davis · Yolo County | — | — |
| Roman Construction | Roman Jackson Ferro | — | (530) 908 1360 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Roomehz Construction | Salai Khin Maung Yee | — | (916) 398 1418 | Electricians | West Sacramento · Yolo County | — | — |
| Royal Design Remodel Repair INC | Nabeel Mohammad Ihsan | royaldesignremodelrepair@gmail.com | (530) 848 8267 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Roy’s Roofing Inc. | Roy’s Roofing Inc. | — | (442) 777-5067 | Other roofers | Escondido · Yolo County | — | — |
| Rudy's Flooring | Rudy's Flooring | rudysflooring@yahoo.com | (916) 205 3218 | Other | West Sacramento · Yolo County | — | — |
| Russell Remodeling | Russell Remodeling | jason.russellremodeling@gmail.com | (916) 963 0053 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Ryan Whittemore Remodeling | Ryan Whittemore Remodeling | — | (530) 312 3201 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Rybin Construction | Rybin Yuri | — | (916) 307 7789 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| S & G Discount Outlet INC DBA S & G Carpet And More | James John Vierra | — | (916) 666 4513 | Other | West Sacramento · Yolo County | — | — |
| S & H Painting Co | Singh Baljit | — | (916) 372 6162 | Windows, patio, painters | West Sacramento · Yolo County | — | — |
| S & S Re - Wall | Dean Michael Noto | — | (916) 521 3362 | Other | Woodland · Yolo County | — | — |
| S J Sarmento Engineering Contractors | Stephen John Sarmento | — | (916) 997 1253 | Other | West Sacramento · Yolo County | — | — |
| S M Air | S M Air | — | (707) 678 6893 | HVAC | Davis · Yolo County | — | — |
| S Pacini Construction | Steven Anthony Pacini | — | (415) 307 7911 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| S R T Construction | Tejeda Sergio | — | (530) 207 9358 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| S V A Construction | Matthew Stephan Van Atta | info@svaconstruction.com | (530) 304 5398 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Sac Heating And Air | David Vladimin Kapelkin | — | (916) 694 4446 | HVAC | West Sacramento · Yolo County | — | — |
| Sac Profloors | Lisa Marie Curbelo | info@sacprofloors.com | (916) 469 4800 | Other | West Sacramento · Yolo County | — | — |
| Sacramento Drywall INC | Cesar Eduardo Anguiano Flores | — | (530) 908 7436 | Other | Woodland · Yolo County | — | — |
| Sacramento Paving INC | Tom Gary Stevens | — | (916) 372 2621 | Other | West Sacramento · Yolo County | — | — |
| Safe Side Security INC | Jon Tyler Klosinski | — | (530) 662 1144 | Electricians | Woodland · Yolo County | — | — |
| Sage Builders LLC | Jess Port Iv Telles | — | (530) 746 7848 | GC, remodel, ADU | Davis · Yolo County | — | — |
| Sal's Roofing Corp | Castro Salvador | — | (916) 206 0739 | Other roofers | Woodland · Yolo County | — | — |
| Salov Tile INC | Denis A Salov | — | (916) 793 8155 | Other | West Sacramento · Yolo County | — | — |
| Sam Ferry-backflow Tester | Sam Ferry-backflow Tester | — | (530) 668 1211 | Other | Woodland · Yolo County | — | — |
| Sam G Jaramillo | Sam G Jaramillo | — | (916) 599 7936 | Windows, patio, painters | West Sacramento · Yolo County | — | — |
| Sanseverino Flooring | Sanseverino Flooring | — | (916) 502 5306 | Other | Woodland · Yolo County | — | — |
| Saxon Concrete | Saxon Concrete | — | (530) 681 5535 | Other | Woodland · Yolo County | — | — |
| Schwartz Construction | Harley Henry Schwartz | — | (530) 304 7731 | GC, remodel, ADU | Winters · Yolo County | — | — |
| Scott Hersch | Scott Hersch | — | (530) 757 7144 | GC, remodel, ADU | Davis · Yolo County | — | — |
| Scratchpad Developments | Scratchpad Developments | — | (916) 617 0189 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Sean Davis | Sean Davis | sean@seandavis.com | (530) 757 2859 | GC, remodel, ADU | Davis · Yolo County | — | — |
| Sean Gallaher DBA Vivid Plumbing | Sean Gallaher DBA Vivid Plumbing | — | (408) 960 5390 | Other | West Sacramento · Yolo County | — | — |
| Sedillo Company INC | Kathleen Ann Sedillo | firstname@sedillo.com | (530) 753 1551 | GC, remodel, ADU | Davis · Yolo County | — | — |