| Clover Valley Home Service | Dale Paul Mcafee | — | (916) 742 3141 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Clyde G Steagall INC | Ronald Dean Steagall | — | (916) 652 1700 | HVAC | Loomis · Placer County | — | — |
| Cm Ponds & Stuff | Cm Ponds & Stuff | — | (408) 691 6431 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Coach Works Construction | William Henry Linder | coachworksconstruction@gmail.com | (916) 630 1336 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Coast Plumbing | Coast Plumbing | — | (916) 548 8541 | Other | Auburn · Placer County | — | — |
| Coastline Plumbing Service | Roman Petrovich Kovalchuk | — | (916) 918 5624 | Other | Roseville · Placer County | — | — |
| Coastline Water Resources INC | Jeremy Ryan Jaeger | — | (916) 923 3437 | Other | Roseville · Placer County | — | — |
| Coating Pro INC | Michelle Louise James | — | (916) 773 7799 | Windows, patio, painters | Loomis · Placer County | — | — |
| Cobalt Construction | Christopher Lee Bradford | — | (916) 879 0347 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Cody Batstone Painting | Cody Batstone Painting | — | (916) 764 1478 | Windows, patio, painters | Lincoln · Placer County | — | — |
| Cojo Development Group | Tatiana Simion Cojocaru | — | (916) 709 8457 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Coldwell Builders | David Cameron Hood | — | (916) 724 5208 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Coldwell Energy | David Cameron Hood | info@coldwellenergy.com | (916) 435 2900 | Electricians | Rocklin · Placer County | — | — |
| Colfax Glass | Colfax Glass | info@colfaxglass.com | (707) 336-8543 | Windows, patio, painters | Colfax · Placer County | — | — |
| Colflesh Millwork | Colflesh Millwork | — | (530) 601 6348 | Other | Carnelian Bay · Placer County | — | — |
| Colin Construction Co | Mark Richard Colin | — | (530) 272 3357 | GC, remodel, ADU | Auburn · Placer County | — | — |
| College Pro | College Pro | — | (530) 305 5783 | Other | Auburn · Placer County | — | — |
| Color Custom Creation INC | Jose Manuel Martinez-Perea | — | (916) 872 1005 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Com Res Services INC | Lloyd Mark Korfman | — | (530) 906 7627 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Comfort 1 Heating And Air | Comfort 1 Heating And Air | — | (916) 765 4481 | HVAC | Auburn · Placer County | — | — |
| Comfort Works Heating And Air Conditioning | Roger Douglas Dedman | — | (916) 839 6357 | HVAC | Roseville · Placer County | — | — |
| Commercial Pump Services INC | Mark Thomas Hodkin | — | (530) 637 9513 | Electricians | Weimar · Placer County | — | — |
| Commers Construction INC | Yalanji Roman | — | (916) 869 7731 | GC, remodel, ADU | Newcastle · Placer County | — | — |
| Complete Building & Office Cleaning | Complete Building & Office Cleaning | — | (916) 952 6072 | Other | Roseville · Placer County | — | — |
| Complete Construction And Rehab | David Watts Sharifie | — | (916) 316 8270 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Complete Landscape & Maintenance | Complete Landscape & Maintenance | — | (916) 532 2516 | Windows, patio, painters | Roseville · Placer County | — | — |
| Complete Tile Work | Complete Tile Work | — | (916) 717 8220 | Other | Roseville · Placer County | — | — |
| Compliant Fire Systems LLC | Aaron Charles Shiles | — | (510) 248 9038 | Other | Rocklin · Placer County | — | — |
| Concierge Floors | Concierge Floors | — | (530) 613 3901 | Other | Rocklin · Placer County | — | — |
| Concrete America LLC | Mohammad Sharif Osmani | — | (415) 488 7359 | Other | Rocklin · Placer County | — | — |
| Concrete Doctor | Concrete Doctor | — | (530) 210 6830 | Other | Applegate · Placer County | — | — |
| Concrete Raya | Concrete Raya | — | (916) 380 1326 | Other | Roseville · Placer County | — | — |
| Conditioned Air | Conditioned Air | — | (916) 305 0789 | HVAC | Roseville · Placer County | — | — |
| Conklin Custom Finishing | Conklin Custom Finishing | — | (530) 613 1099 | Windows, patio, painters | Auburn · Placer County | — | — |
| Connected Technology | William Shidler Horbaly | office@connected-technology.com | (916) 824 1800 | HVAC | Rocklin · Placer County | — | — |
| Conrique Construction | David Jr Conrique | — | (530) 515 4831 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Conscapes | Jose Jesus De La Torre | info@conscapes.com | (916) 521 1411 | Other | Lincoln · Placer County | — | — |
| Conserva Irrigation Of North Sacramento | Anthony Jay Gray | — | (916) 244 1955 | Windows, patio, painters | Roseville · Placer County | — | — |
| Construction | Aleksey Mikhaylovich Motronchik | — | (916) 595 5859 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Construction 37 | Felipe Thomas Johnson | — | (916) 879 1606 | GC, remodel, ADU | Newcastle · Placer County | — | — |