| Stowell Plumbing LLC | Gregory James Seefeldt | stowellplumbing@gmail.com | (805) 410-1663 | Other | Thousand Oaks · Ventura County | — | — |
| Straight Line Electric | James Darren Howery | — | (805) 639 0995 | Electricians | Ventura · Ventura County | — | — |
| Strcc | Sevan Avedian | — | (818) 919 3386 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Streetcal Enterprises | Paul Juarez | — | (805) 889 9981 | Other | Oxnard · Ventura County | — | — |
| Streetlight Restoration Specialists INC | Brian Michael Moran | — | (805) 468 5271 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Strictly Wood | Strictly Wood | — | (805) 256 0129 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Strieby Tile Works | Strieby Tile Works | — | (805) 320 8162 | Other | Ventura · Ventura County | — | — |
| Structural Builders INC | Agustin Casillas | info@structural-builders.com | (818) 257 1743 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Struktur INC | Nancy Ann Gilbert | — | (805) 630 7885 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Stucco Colormatch Corporation | Young Kap | — | (805) 312 6466 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Studio Landscape Corporation | Kathleen Ann Nolan | — | (805) 646 8384 | Windows, patio, painters | Ojai · Ventura County | — | — |
| Studio Unique Woodworking | Studio Unique Woodworking | — | (805) 405 4424 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Studiodig Build INC | Nicole Forbyn Hawthorne | — | (805) 766 9600 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Sturdy Built INC | Nancy Jo Armstrong | — | (805) 552 9927 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Style Drapery | Style Drapery | — | (805) 479 6277 | Other | Ventura · Ventura County | — | — |
| Sub - Zero Excavating Incorporated | Robert Angus Fletcher | — | (805) 522 5043 | Other | Simi Valley · Ventura County | — | — |
| Sullivan Electric | Brien Christopher Sullivan | — | (805) 204 6092 | Electricians | Newbury Park · Ventura County | — | — |
| Sulphur Crest Electric INC | Brian Mathew Lindsay | — | (805) 479 1591 | Electricians | Ojai · Ventura County | — | — |
| Summer Air | Summer Air | — | (805) 490 2722 | HVAC | Simi Valley · Ventura County | — | — |
| Summer Construction INC | Samuel Ralph Jr Bennett | — | (805) 933 9364 | Other | Santa Paula · Ventura County | — | — |
| Summers Plumbing | Summers Plumbing | — | (805) 342 8568 | Other | Ventura · Ventura County | — | — |
| Summit Air Conditioning And Heating | Summit Air Conditioning And Heating | — | (805) 529 7421 | HVAC | Moorpark · Ventura County | — | — |
| Summit Construction | Ivan Bravo Calderon | — | (805) 229 9916 | GC, remodel, ADU | Piru · Ventura County | — | — |
| Summit Flooring INC | Eladio Jr Lopez | — | (805) 843 7985 | Other | Oxnard · Ventura County | — | — |
| Summit Landscaping Co | Ivan Sandoval | — | (805) 814 3695 | Windows, patio, painters | Somis · Ventura County | — | — |
| Summit Pools & Spas | Summit Pools & Spas | — | (805) 910 5827 | Pool | Camarillo · Ventura County | — | — |
| Sun - Mass INC | Randal Lee Sarna | — | (310) 261 4708 | Other | Moorpark · Ventura County | — | — |
| Sun Bathtub Services | Martha Cordero Banuelos | — | (800) 924 3341 | Other | Santa Paula · Ventura County | — | — |
| Sun City Window Tinting And Landscape Services | Francisco Paulino Cano Beltran | — | (805) 861 7278 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Sun Coast Pool Maintanance | Sun Coast Pool Maintanance | — | (805) 370 9108 | Pool | Newbury Park · Ventura County | — | — |
| Sun Wave Surfacing INC | Shane Timothy Bitts | info@sunwavesurfacing.com | (805) 915 4710 | Other | Simi Valley · Ventura County | — | — |
| Sunburst Skylights | Leonard Peter Parise | sunburstsky1@gmail.com | (805) 499 5597 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Suncrest Pool And Spa Service | Jason Andrew Trone | — | (805) 200 7999 | Pool | Ventura · Ventura County | — | — |
| Sundance Construction Group INC | Jack J Jr Kelly | — | (310) 351 3577 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Sunny Side Construction | Alejandro Nava Salinas | tomm@sunnysideconstruction.com | (805) 589 3255 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Sunnymoon-electric | Shokouhi Bidhendi Hamed | — | (818) 943 7382 | Electricians | Oxnard · Ventura County | — | — |
| Sunridge Landscape Maintenance INC | Craig Robert Loft | — | (805) 987 0918 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Sunrise Enterprises & Construction INC | William Hans Borman | — | (805) 947 9114 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Sunrise Tree INC | Luke Michael Klinzing | — | (805) 642 8836 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Sunset Construction | Justin Denver Holt | — | (805) 522 3206 | Other | Simi Valley · Ventura County | — | — |