| Sportswest Construction | Sheryl Simpson Hendrickson | — | (805) 526 5899 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Square One Construction Management | Christopher Scott Ferqueron | — | (805) 368 5859 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Srd Demolition INC | Mark Edmond Shuter | — | (805) 341 3146 | Other | Simi Valley · Ventura County | — | — |
| Srl Construction INC | Scott Ryan Lowry | srlconstruction@yahoo.com | (805) 509 1757 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| St Amant Constructs LLC | Matthew John St Amant | — | (805) 750 2214 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| St Elmo's Fire Rigging INC | Michael Ray Harvey | mike@sefrigging.com | (310) 925 6205 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| St Patrick's Rattlesnake & Rabbit Fencing Solutions | Kenneth Franklin White | — | (805) 760 8079 | Other | Port Hueneme · Ventura County | — | — |
| Stader Tile | Stader Tile | — | (805) 815 6310 | Other | Ojai · Ventura County | — | — |
| Stairs Plus More | Stairs Plus More | stairsplusmore@gmail.com | (805) 341 1573 | Other | Newbury Park · Ventura County | — | — |
| Stamp Electric | Jeremiah David Stamp | jeremiahstamp@yahoo.com | (805) 654 9937 | Electricians | Ventura · Ventura County | — | — |
| Standard Construction | Brian Phillip Geyer | interested@domainmarket.com | (949) 423 9155 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Standard Demolition INC | John Daniel Scheck | — | (805) 643 6669 | Other | Ventura · Ventura County | — | — |
| Standard Industries | Lennie Michael Scheck | — | (805) 643 6669 | Other | Ventura · Ventura County | — | — |
| Standard Site Rentals INC DBA Standard Light & Power | Josh Edgar Cook | — | (805) 620 7553 | Electricians | Santa Paula · Ventura County | — | — |
| Stanley Lath & Plaster INC | Scott Thompson Stanley | — | (805) 526 3183 | Other | Fillmore · Ventura County | — | — |
| Stanton Pools INC | Eric William Stanton | eric@stantonpools.com | (714) 227 9146 | Pool | Westlake Village · Ventura County | — | — |
| Stanton Walsh Tile | Stanton Walsh Tile | — | (805) 402 8851 | Other | Camarillo · Ventura County | — | — |
| Staples Construction | Tonya Renee Staples | — | (805) 658 8786 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Star Quality Construction Group INC | Craig Robert Murphy | — | (805) 796 5981 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Starcon General Contractors | Steven Michael Margolis | — | (805) 497 6000 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| State Restoration INC | Darlene Darinka Slepcevic | — | (805) 379 1276 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Steadfast General Contractors INC | Sean Aaron David Segal | — | (805) 907 8090 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Steady Solutions INC | Fabien J Reille | — | (805) 242 6395 | Electricians | Westlake Village · Ventura County | — | — |
| Steelworks Etc INC | Robin William Shattuck | info@steelworksetc.com | (805) 499 3400 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Steinert Construction | Walter Lloyd Steinert | — | (310) 991 2660 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Stellar Sewers Coastal Plumbing | Stellar Sewers Coastal Plumbing | — | (805) 500 0392 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Stephen A Shea | Stephen A Shea | — | (310) 625 5583 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Stephen Darling Plastering | Stephen Darling Plastering | — | (818) 731 5091 | Other | Simi Valley · Ventura County | — | — |
| Stephen F Menzer | Stephen F Menzer | — | (805) 340 0860 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Stephen Gomez Tile | Stephen Gomez Tile | — | (805) 497 0107 | Other | Thousand Oaks · Ventura County | — | — |
| Stephen J Griffin | Stephen J Griffin | — | (805) 259 4307 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Stephen Joseph Lopez | Stephen Joseph Lopez | — | (415) 531 2850 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Sterling Builders INC | Grant Sterling Hutchinson | — | (805) 861 4548 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Sterling Data Systems | Jesse Steven Jordan | — | (805) 304 8003 | Other | Simi Valley · Ventura County | — | — |
| Sterling Gardens INC | Laurie Blodgett Young | — | (805) 231 3695 | Windows, patio, painters | Moorpark · Ventura County | — | — |
| Steve Anderson Construction | Steven Damon Anderson | — | (805) 402 8836 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Steve Broughton Garage Improvement Solutions | Steve Broughton Garage Improvement Solutions | — | (805) 444 4039 | Other | Ventura · Ventura County | — | — |
| Steve Coletta Masonry | Steve Coletta Masonry | — | (805) 497 4826 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Steve Davis & Sons Pools INC | Susan Irene Davis | — | (805) 373 0218 | Pool | Thousand Oaks · Ventura County | — | — |
| Steve Dier Construction | Steven Randolf Dier | — | (818) 317 5080 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |