| Clear View Window & Door | Henry Nicholas Brest | — | (916) 580 9107 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Clearly Glass | Clearly Glass | — | (530) 319 7900 | Windows, patio, painters | Redding · Shasta County | — | — |
| Clement Coatings | Clement Coatings | — | (530) 863 5319 | Windows, patio, painters | Redding · Shasta County | — | — |
| Clifford Landscape | Clifford Landscape | cliffordlandscape@gmail.com | (530) 646 8564 | Windows, patio, painters | Redding · Shasta County | — | — |
| Climatech Electric | Michael Lee Clinite | — | (530) 806 3327 | HVAC | Redding · Shasta County | — | — |
| Clinton Burns | Clinton Burns | — | (530) 953 9353 | Other | Redding · Shasta County | — | — |
| Clyde Jeff Davis Construction | Clyde Jeff Davis | — | (530) 921 7137 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cmc Landscaping LLC | Christopher Michael Crane | — | (530) 338 9062 | Windows, patio, painters | Redding · Shasta County | — | — |
| Cnc Pumps LLC | Chance Caleb Martin | — | (530) 722 8788 | Other | Redding · Shasta County | — | — |
| Coburn's Asphalt INC | Gregory Charles Coburn | coburnsasphalt@gmail.com | (530) 347 0152 | Other | Cottonwood · Shasta County | — | — |
| Cody Jones Construction | Cody Kenneth Jones | — | (530) 941 1362 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| Cogger Construction | Sean Michael Cogger | — | (209) 640 2776 | GC, remodel, ADU | Anderson · Shasta County | — | — |
| Comer Communication | Daniel Steven Comer | — | (530) 241 5610 | Other | Redding · Shasta County | — | — |
| Commercial Glass INC | John William Woods | office@commercial-glass.com | (530) 605 2222 | Windows, patio, painters | Anderson · Shasta County | — | — |
| Commercial Landscape Services | Jeffrey Lloyd Haynes | — | (530) 223 6327 | Windows, patio, painters | Redding · Shasta County | — | — |
| Complete Gutters | Complete Gutters | — | (530) 921 0309 | Other | Redding · Shasta County | — | — |
| Complete Lawn & Landscape INC | Joshua Allen Hoffman | — | (530) 319 7101 | Windows, patio, painters | Redding · Shasta County | — | — |
| Concrete Concepts | Concrete Concepts | — | (530) 604 2109 | GC, remodel, ADU | Bella Vista · Shasta County | — | — |
| Concrete Construction Excavating INC | Jeramie Daniel Chase | — | (530) 722 7754 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Connected Electric | Billy Wesley Wilson | — | (530) 355 1677 | Electricians | Redding · Shasta County | — | — |
| Contour - Sierra INC | Steven Lee Rankin | info@contoursierra.com | (530) 448-9188 | Other | Anderson · Shasta County | — | — |
| Converse Construction INC | Patsy Ann Turner | — | (530) 378 5591 | Electricians | Redding · Shasta County | — | — |
| Cook Construction | Wesley Alan Cook | — | (530) 949 5813 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| Cook's Remodeling & Restoration | Cook's Remodeling & Restoration | — | (530) 604 3750 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Corbett's Heating & Air Conditioning | Corbett's Heating & Air Conditioning | — | (530) 602 2617 | HVAC | Redding · Shasta County | — | — |
| Corcoran HVAC Services | Kieran Phillip Corcoran | — | (707) 671 3021 | HVAC | Redding · Shasta County | — | — |
| Cordova's Lawn Service | Jessie Manuel Cordova | cordovaslawnservice@gmail.com | (530) 917 1771 | Windows, patio, painters | Cottonwood · Shasta County | — | — |
| Core Ten Resources INC | Thomas Riley Gregory | info@coretenresources.com | (530) 410 2124 | Other | Cottonwood · Shasta County | — | — |
| Cornerstone Construction | Jay Brian Patterson | gwebb@cornerstone-construction.com | (832) 259-2520 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cornerstone Door Co | Matthew Kelly| Payne Matt Kelly Payne | — | (530) 242 6902 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cotter Electric | Christopher Carl Cotter | — | (530) 222 8799 | Electricians | Redding · Shasta County | — | — |
| Cotton Construction & Restoration | Henry Augustus Cotton | — | (530) 917 5710 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cottonwood Custom Mirror And Glass | Cottonwood Custom Mirror And Glass | — | (530) 347 7126 | Windows, patio, painters | Cottonwood · Shasta County | — | — |
| Cougar Concrete Pumping INC | Theodore Dale Garner | — | (530) 605 9769 | Other | Palo Cedro · Shasta County | — | — |
| Coughlin Development Corporation | Frank William Coughlin | — | (530) 223 0322 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Coulter Construction | Steven Bruce Coulter | — | (530) 209 8885 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cousin Gary Homes | Gerhard Edgar Larsen | — | (530) 343-8494 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Cousin Vinnie's Heating & Air | Vincent Frank Bruccheri | — | (530) 604 7939 | HVAC | Redding · Shasta County | — | — |
| Covenant Forge Construction | Abu Saada Sary | — | (530) 201 8254 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Covert Coatings | Barak Covert | — | (530) 591 2888 | GC, remodel, ADU | Redding · Shasta County | — | — |