| C Side Electric Co | Christopher Bart Carl Calmenson | — | (805) 550 9809 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| C W Lackie Construction | Charles William Lackie | — | (805) 235 8695 | GC, remodel, ADU | Oceano · San Luis Obispo County | — | — |
| C&r Premier Landscaping LLC | Cuevas Ramiro Hernandez | — | (805) 712 2906 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Caddy Plastering | Caddy Plastering | — | (805) 489 8633 | Other | Grover Beach · San Luis Obispo County | — | — |
| Cadwell & Co | Martin Niaz Jr Mohamed | — | (760) 996 0888 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Cairn Collaborative INC | Michael Sean Horgan | — | (805) 874 2424 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Cal Coast Builders | Cal Coast Builders | — | (805) 859 4057 | HVAC | Atascadero · San Luis Obispo County | — | — |
| Cal Coast Construction And Framing INC | Mitchell Falk Stafford | — | (805) 550 1963 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Cal Coast Finish Carpentry - Ccfc | German Omar Lozano | — | (805) 400 5206 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Cal Coast Gutters | Cal Coast Gutters | — | (805) 239 1674 | Other | Paso Robles · San Luis Obispo County | — | — |
| Cal Coast Hardscape & Irrigation LLC | Lopez Alejandro Rios | — | (805) 215 6507 | Windows, patio, painters | San Miguel · San Luis Obispo County | — | — |
| Cal Coast Overhead Door | Cal Coast Overhead Door | — | (805) 473 2561 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Cal Coast Plumbing | Arpad Soo | — | (805) 235 0286 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Cal Coast Pool Construction | Cal Coast Pool Construction | — | (805) 466-7667 | Pool | Atascadero · San Luis Obispo County | — | — |
| Cal Paso Electric INC | Thomas Roland Defosses | — | (805) 238 2119 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Cal Star Improvements LLC | Calin Eliot Reiss | — | (215) 630 7535 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Cal-pacific Electric | Jaime Brian Cleek | calpacific@gmail.com | (805) 545 0007 | Electricians | San Luis Obispo · San Luis Obispo County | — | — |
| Cali Coast Painting | Cali Coast Painting | — | (805) 550 2685 | Windows, patio, painters | Cambria · San Luis Obispo County | — | — |
| Cali Construction LLC | Angel Chairez | — | (702) 556 2507 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Caliber Concrete & Construction INC | Samuel Joseph Hamman | — | (805) 234 7714 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| California Builders | California Builders | — | (805) 610 3910 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| California Central Fire Protection INC | Kymberly Ann Saenz | — | (805) 801 7185 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| California Heating And Air Conditioning | Paul Wesley Jr Bennett | — | (805) 237 8566 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| California Hydro - Jet & Rooter Service | Chase Wilcox Palmer | — | (860) 961 1350 | Other | Cambria · San Luis Obispo County | — | — |
| California Joe's Painting Company INC | Joseph Anthony Blandford | — | (805) 712 9785 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| California Pools Of San Luis Obispo | Angela Dee Atkinson | — | (805) 423 5933 | Pool | Santa Margarita · San Luis Obispo County | — | — |
| California Republic Drywall | California Republic Drywall | ca.republicdrywall@gmail.com | (805) 674 5123 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| California West | California West | — | (805) 543-9119 | Property managers | San Luis Obispo · San Luis Obispo County | — | — |
| Callery Construction | Robert Andrew Callery | — | (805) 712 1244 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Calscape 805 | Calscape 805 | — | (805) 598 8291 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| Calscape 805 Outdoor Living INC | Tyler Anthony Dashek | — | (805) 598 8291 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| Calsun Electric Systems | Chad Olivier Stern | — | (805) 239 0111 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Calwest Tree Service In Slo | Calwest Tree Service In Slo | pasorobles996@gmail.com | (805) 536-0942 | Tree | San Luis Obispo · San Luis Obispo County | — | — |
| Camacho Plumbing INC | Alex Camacho | — | (805) 550 9119 | Other | Templeton · San Luis Obispo County | — | — |
| Camber Construction | Jeremy Rion Meigs | — | (805) 471 1217 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Cambria Electric And Security Systems | Adam Cord Seagle | — | (805) 927 8114 | Electricians | Cambria · San Luis Obispo County | — | — |
| Cambria Pines Tree Service | Brayan Misael Pena Ramirez | — | (805) 927 4414 | Tree | Cambria · San Luis Obispo County | — | — |
| Cambria Plumbing INC | Brian Michael Sturgeon | — | (805) 400 8951 | Other | Paso Robles · San Luis Obispo County | — | — |
| Cambria Roofing 'guaranteed Roof Repairs' | Keith Edward Conners | — | (805) 235 4957 | Other roofers | Cambria · San Luis Obispo County | — | — |
| Came Security Alarms | Colette Mary Came | — | (805) 772 0607 | Electricians | Morro Bay · San Luis Obispo County | — | — |