| S & S Electric | Lance Justin Stewart | bgehr@sselectric.com | (209) 966 5252 | Electricians | Mariposa · Mariposa County | — | — |
| S P Allison | S P Allison | — | (209) 966 4082 | Other | Mariposa · Mariposa County | — | — |
| Salonen Enterprises INC | Debra Kay Salonen | — | (209) 966 7798 | GC, remodel, ADU | Catheys Valley · Mariposa County | — | — |
| Scott Dobson Painting | Scott Dobson Painting | — | (559) 658 0613 | Windows, patio, painters | Mariposa · Mariposa County | — | — |
| Secard Pools & Spas | Secard Pools & Spas | customerservice@secardpools.com | (760) 947-9000 | Pool | Hesperia · Mariposa County | — | — |
| Sequoia Construction | Samuel James Fluharty | — | (209) 628 0358 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Service Electric | Che' Sundance Robbins | — | (209) 769 4563 | Electricians | Mariposa · Mariposa County | — | — |
| Seymour Mastication And Timber Operations | Keenan Christian Seymour | — | (559) 977 2744 | Other | Mariposa · Mariposa County | — | — |
| Shimer Landscaping | Shimer Landscaping | — | (209) 419 0705 | Windows, patio, painters | Coulterville · Mariposa County | — | — |
| Sierra Communications & Construction INC | Stacey Lynn Ball | — | (209) 742 4948 | Other | Catheys Valley · Mariposa County | — | — |
| Sierra Masonry | Sierra Masonry | — | (209) 628 2891 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Sierra Nevada General Engineering | Justin William Wass | — | (209) 617 1502 | Tree | Mariposa · Mariposa County | — | — |
| Sierra North Construction INC | Beilby Russell | — | (323) 784 4347 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Sinatra Painting | Sinatra Painting | — | (760) 753-8846 | Windows, patio, painters | Carlsbad · Mariposa County | — | — |
| Sjvc Victor Valley | Sjvc Victor Valley | — | (760) 948-1947 | HVAC | Hesperia · Mariposa County | — | — |
| Smith Construction Services LLC | Gene William Smith | — | (209) 760 3079 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Solvantorixor SolvantorixorroofingProtected | Solvantorixor Solvantorixorroofing | — | (971) 871-3616 | Tile roofers | Carlsbad · Mariposa County | — | — |
| Springer's Arbor Co. | Simon Bryan Springer | — | (209) 347 7633 | Other | Mariposa · Mariposa County | — | — |
| Stay Yosemite - Property Management Company | Stay Yosemite - Property Management Company | — | (209) 347-6149 | Property managers | Mariposa · Mariposa County | — | — |
| Stu's Construction INC | Stuart Alan Bello | — | (209) 347 0243 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Summit Electric | Jason Isaac Swartz | sales@summit-electric.com | (209) 966 2039 | Electricians | Mariposa · Mariposa County | — | — |
| Superior Home Remodeling Laguna Woods | Superior Home Remodeling Laguna Woods | — | (949) 427-7402 | GC, remodel, ADU | Laguna Woods · Mariposa County | — | — |
| Thermal Alliance | Thermal Alliance | — | (805) 302 2797 | HVAC | Mariposa · Mariposa County | — | — |
| Thinkbuilt | Jonathan Patrick Lampman | — | (310) 968 2520 | Electricians | Mariposa · Mariposa County | — | — |
| Thomas Hoskins Construction | Thomas Richard Hoskins | — | (209) 742 4169 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Thomas R Archibald | Thomas R Archibald | — | (209) 966 5941 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Timmy D's Tree Management | Timmy D's Tree Management | — | (209) 628 8530 | Tree | Mariposa · Mariposa County | — | — |
| Tip Top Renovations | Tip Top Renovations | — | (805) 441 4147 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Topcoat Painting | Timothy Scott Herring | — | (408) 656 8815 | Windows, patio, painters | Mariposa · Mariposa County | — | — |
| Troy Guenthart Construction | Troy Allen Guenthart | — | (209) 376 2224 | GC, remodel, ADU | Catheys Valley · Mariposa County | — | — |
| Trujillo And Sons Construction | Kenneth Anthony Trujillo | — | (209) 617 6944 | GC, remodel, ADU | Catheys Valley · Mariposa County | — | — |
| Verley Construction INC | Edwin A Verley | — | (209) 742 4076 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Verrinder Construction | Jesse Mark Verrinder | — | (209) 347 3081 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| W Bray Electric | William Arron Bray | — | (559) 676 8336 | Electricians | Mariposa · Mariposa County | — | — |
| W E Spencer Construction | Wayne Edward Spencer | — | (408) 219 7572 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Weiland Construction INC | Daniel Lee Weiland | peter@weilandconstruction.com | (209) 742 3522 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| William Robert Dewitt | William Robert Dewitt | — | (209) 742 6203 | Other roofers | Mariposa · Mariposa County | — | — |
| William Smith Plumbing | William Smith Plumbing | — | (209) 742 7198 | Other | Mariposa · Mariposa County | — | — |
| Williams Excavation INC | Keith Merle Williams | — | (209) 769 5807 | Other | Mariposa · Mariposa County | — | — |
| Williams Walt Tractor | Williams Walt Tractor | — | (209) 756 5563 | Other | Mariposa · Mariposa County | — | — |