| Pest Control Fontana Ca | Pest Control Fontana Ca | businessinfo@pestcontrolfontanaca.site | (909) 978-2725 | Pest, tile roofs | Fontana · Sierra County | — | — |
| Phebus Engineering INC | Grant Edward Phebus | — | (916) 296 2933 | Other | Loyalton · Sierra County | — | — |
| Range Of Light Construction Co | Robert Lee Macey | — | (530) 913 5551 | GC, remodel, ADU | Loyalton · Sierra County | — | — |
| Restorerz Emergency Services | Restorerz Emergency Services | — | (949) 835-5439 | Restoration | Placentia · Sierra County | — | — |
| Roof Supply Co. Escondido | Roof Supply Co. Escondido | — | (213) 596-8052 | Tile distributors | Escondido · Sierra County | — | — |
| Sierra Construction & Design Inc. | Sierra Construction & Design Inc. | — | (310) 424-6800 | GC, remodel, ADU | Pacific Palisades · Sierra County | — | — |
| Sierra Industrial Engrg Co | Sierra Industrial Engrg Co | — | (562) 923-8075 | Electricians | Downey · Sierra County | — | — |
| Sierra Inspection Services | Sierra Inspection Services | — | (209) 296-3330 | Inspectors | Pine Grove · Sierra County | — | — |
| Sierra Investment Properties INC | Sierra Investment Properties INC | — | (818) 841-1180 | Property managers | Burbank · Sierra County | — | — |
| Sierra Madre Pest Control | Sierra Madre Pest Control | — | (235) 223-4502 | Pest, tile roofs | Sierra Madre · Sierra County | — | — |
| Sierra Madre Roofing Services | Sierra Madre Roofing Services | — | (323) 689-5836 | Other roofers | Sierra Madre · Sierra County | — | — |
| Sierra Pacific Windows | Sierra Pacific Windows | — | (949) 788-4920 | Windows, patio, painters | Irvine · Sierra County | — | — |
| Sierra Padre Doors And Windows | Sierra Padre Doors And Windows | — | (760) 753-5368 | Windows, patio, painters | San Marcos · Sierra County | — | — |
| Sierra Pool Company | Sierra Pool Company | — | (559) 909-3350 | Pool | Cypress · Sierra County | — | — |
| Sierra Pools & Spas | Sierra Pools & Spas | — | (530) 353-3548 | Pool | Oroville · Sierra County | — | — |
| Sierra Power Services | Sierra Power Services | — | (916) 996-0392 | Electricians | Foresthill · Sierra County | — | — |
| Sierra Termite Control Inc. | Sierra Termite Control Inc. | — | (800) 993-9655 | Pest, tile roofs | Los Alamitos · Sierra County | — | — |
| Sierra Tree Svc LLC | Sierra Tree Svc LLC | sierratreeservice@gmail.com | (661) 340-0715 | Tree | Bakersfield · Sierra County | — | — |
| Sierra Window Concepts | Sierra Window Concepts | — | (888) 448-6445 | Windows, patio, painters | Glendale · Sierra County | — | — |
| South Coast Tree Service | South Coast Tree Service | — | (858) 578-9772 | Tree | Ramona · Sierra County | — | — |
| Steve Upton Construction | Steve Michael Upton | — | (775) 351 5851 | GC, remodel, ADU | Loyalton · Sierra County | — | — |
| Superior Pools | Superior Pools | — | (619) 312-7248 | Pool | Vista · Sierra County | — | — |
| Timothy Ivan Butler | Timothy Ivan Butler | — | (530) 616 1901 | GC, remodel, ADU | Calpine · Sierra County | — | — |
| Tom Mc Elroy Construction | Thomas Owen Mc Elroy | — | (530) 320 4281 | GC, remodel, ADU | Sierraville · Sierra County | — | — |
| Western Exterminator | Western Exterminator | — | (909) 724-4276 | Pest, tile roofs | Chino · Sierra County | — | — |
| William Vincent O'donnell | William Vincent O'donnell | — | (530) 263 2184 | GC, remodel, ADU | Sierra City · Sierra County | — | — |
| Xtermite INC | Xtermite INC | info@xtermite.com | (888) 253-9981 | Pest, tile roofs | Santee · Sierra County | — | — |