| Campbell Construction | Mark Kenton Campbell | — | (805) 909 8056 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| Campbell Construction | Brian Joseph Campbell | — | (805) 234 2084 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Campfire Construction | Jonathan Robert Kessler | — | (805) 540 0035 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Campos Landscape INC | Campos Bonal Jorge | — | (805) 257 8088 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Canaday Electric | Corkran Randolph Canaday | — | (805) 975 7739 | Electricians | Morro Bay · San Luis Obispo County | — | — |
| Canned Pineapple Co | Shelby Erin Lowe | — | (805) 215 9029 | Windows, patio, painters | San Luis Obispo · San Luis Obispo County | — | — |
| Cannon Corporation | Taylor Steven Groos | — | (805) 554 7407 | Electricians | San Luis Obispo · San Luis Obispo County | — | — |
| Cannon Plumbing | Cannon Plumbing | — | (805) 720 2805 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Cantrell Const Co | Robert Wayne Cantrell | — | (805) 489 9320 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Capstone Concrete Design INC | Quezada Edgar | — | (805) 602 2583 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Carecraft Pools | Jessica Marie Petersen | info@carecraftpools.com | (805) 439 3040 | Pool | San Luis Obispo · San Luis Obispo County | — | — |
| Carecraft Pools Of Central Calif INC DBA Carefree Pools And Spas | Michael Dean Mc Clure | — | (805) 544 7773 | Pool | Avila Beach · San Luis Obispo County | — | — |
| Carl Beach | Carl Beach | — | (949) 923 9922 | Electricians | Grover Beach · San Luis Obispo County | — | — |
| Carl Construction | Jacob Carl Crizer | — | (805) 471 3545 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Carlson Concrete | Carlson Concrete | — | (831) 359 9819 | Other | Santa Margarita · San Luis Obispo County | — | — |
| Carlson Design And Project Management | Carlson Design And Project Management | — | (805) 305 3898 | GC, remodel, ADU | Cayucos · San Luis Obispo County | — | — |
| Carmel River Inn Management INC | Dirk Stephen Winter | — | (805) 909 0476 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| Carmichael Environmental | Carmichael Environmental | info@carmichaelenvironmental.com | (805) 801 6956 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| Carpet Discount Center | Lawrence Todd Livermore | — | (805) 543 6586 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Carr Construction And Residential Remodel LLC | Thomas James Carr | — | (805) 792 0793 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Carroll Painting | Carroll Painting | — | (805) 674 1066 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Carty Built Millworks | Carty Built Millworks | — | (925) 915 1985 | Other | Morro Bay · San Luis Obispo County | — | — |
| Cary Bennett Construction | Cary Glenn Bennett | — | (805) 441 3397 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Cary Garner LLC | Cary Russell Garner | — | (949) 395 9200 | GC, remodel, ADU | Santa Margarita · San Luis Obispo County | — | — |
| Cascade Contracting Company | Jonathan Jacob Sr White | — | (888) 542 2722 | Other roofers | Atascadero · San Luis Obispo County | — | — |
| Case Pacific Company | Jacqueline Anne Lewelling | — | (805) 237 8851 | Other | Paso Robles · San Luis Obispo County | — | — |
| Casey Ferreria Construction Incorporation | Casey Lee Ferreira | — | (805) 550 5628 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Casey Johnston Construction INC | Casey Patrick Johnston | — | (805) 473 3033 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Casey Lintner Plumbing INC | Casey Dean Lintner | — | (805) 550 1843 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Casey Ogle Construction | Casey Damon Ogle | — | (661) 331 7204 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Casey's Landscaping | Casey's Landscaping | — | (805) 441 6623 | Windows, patio, painters | Pismo Beach · San Luis Obispo County | — | — |
| Casias Construction | Benedict James Casias | — | (805) 931 9229 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Cass Holuk Electric | Cass Loren Holuk | — | (805) 215 2934 | Electricians | Cayucos · San Luis Obispo County | — | — |
| Cassia Landscape | Cassia Landscape | — | (805) 627 2038 | Windows, patio, painters | Arroyo Grande · San Luis Obispo County | — | — |
| Castle Construction LLC | Andrew Mitchell Berry | — | (805) 423 4157 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Castle Keepers INC | Castle Keepers INC | — | (805) 543-9138 | Property managers | San Luis Obispo · San Luis Obispo County | — | — |
| Castle Plumbing | Castle Plumbing | — | (805) 481 8000 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Castlerock Development | Darren Wayne Shetler | — | (805) 546 8100 | Electricians | San Luis Obispo · San Luis Obispo County | — | — |
| Castor Painting | Castor Painting | — | (805) 709 1685 | Windows, patio, painters | Pismo Beach · San Luis Obispo County | — | — |
| Castro Construction | Castro Randy | support@webador.com | (805) 471 5011 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |