| Carol J Flynn INC | Marco Juan Sandoval | — | (650) 697 1535 | HVAC | Brisbane · San Mateo County | — | — |
| Carol Proctor Collins | Carol Proctor Collins | — | (650) 323 1130 | GC, remodel, ADU | Atherton · San Mateo County | — | — |
| Carolan Construction INC | Sylvester Carolan | — | (650) 921 0238 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Carpet Systems INC | Frank Farhad Nazarian | — | (650) 692 6300 | Other | Burlingame · San Mateo County | — | — |
| Carral Building Corp | Aaron Agustin Carral Maya | — | (415) 542 8775 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Carranza Painting Solutions Invc | Felix Pedro Carranza Vargas | — | (925) 705 3420 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Carrick & English Property | Carrick & English Property | — | (650) 340-9961 | Property managers | San Mateo · San Mateo County | — | — |
| Carrillo Construction INC | Ralph Anthony Carrillo | c.carrilloconstruction@gmail.com | (415) 370 7913 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Carrillo's Carpet | Carrillo's Carpet | — | (510) 776 6753 | Other | Burlingame · San Mateo County | — | — |
| Carroll Custom Homes INC | Augustus Houlihan Carroll | gus@carrollcustomhomes.com | (650) 207 9668 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Carstens Construction Co | Chris Alf Carstens | — | (650) 349 0431 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Caruso Construction INC | Michael John Caruso | info@ndiscovered.com | (415) 674 3969 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Caruzo's Roofing Contractors | Marco Antonio Caruzo | — | (650) 271 3968 | Other roofers | Millbrae · San Mateo County | — | — |
| Carvajal Painting | Carvajal Painting | — | (650) 518 3089 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Cary Wing Plumbing & Fire Protection INC | Cary Wai Hai Wing | — | (650) 619 4150 | HVAC | San Mateo · San Mateo County | — | — |
| Casa Construction | Gonzalez Victorugo | — | (650) 483 0623 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Casagrande Construction | John Francis Casagrande | — | (650) 400 3198 | GC, remodel, ADU | So San Francisco · San Mateo County | — | — |
| Casarotti Design | Casarotti Design | — | (650) 201 8551 | Other | Daly City · San Mateo County | — | — |
| Cascade Flooring | Cascade Flooring | — | (650) 465 0929 | Other | Burlingame · San Mateo County | — | — |
| Casey Construction | Casey Mel | — | (650) 369 1876 | GC, remodel, ADU | Emerald Hills · San Mateo County | — | — |
| Casey Construction INC | Brenden Joseph Casey | — | (650) 369 1876 | GC, remodel, ADU | Emerald Hills · San Mateo County | — | — |
| Casey Leonard | Casey Leonard | — | (775) 379 0703 | Windows, patio, painters | Burlingame · San Mateo County | — | — |
| Casman Construction INC | Felipe Castillo | — | (650) 787 6471 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Castada Construction Corp | Hector Alberto Castaneda Fernandez | — | (408) 899 0854 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Castaneda's Painting | Castaneda's Painting | — | (415) 756 1042 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Castellanos Construction INC | Gregory Jose Villavicencio | — | (650) 245 6032 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Castellino Electric INC | Steven Mark Castellino | — | (650) 873 7445 | Electricians | San Bruno · San Mateo County | — | — |
| Castillo Gardening Landscaping INC | Santos Jesus Castillo Guzman | — | (650) 771 1866 | Windows, patio, painters | San Carlos · San Mateo County | — | — |
| Castillo Landscaping | Castillo Landscaping | — | (650) 346 7158 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Castle Rock Design And Development INC | Jarom Michael Feriante | — | (650) 327 3200 | Other roofers | Menlo Park · San Mateo County | — | — |
| Catmex | Suzanne Barbara Mendoza | — | (415) 235 4915 | Windows, patio, painters | San Bruno · San Mateo County | — | — |
| Causkey Construction | Brian John Harrington | — | (415) 275 0063 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Cavagnaro Bros Plumbing | Cavagnaro Bros Plumbing | — | (415) 760 0348 | Other | Daly City · San Mateo County | — | — |
| Cavan Construction | David Brigham Cavan | — | (650) 207 1631 | GC, remodel, ADU | Belmont · San Mateo County | — | — |
| Cavara Tree Service INC | Vazquezramirez Castor | — | (650) 720 0015 | Tree | Redwood City · San Mateo County | — | — |
| Cawc Waterproofing & Restoration | Brennan James Mayer | — | (650) 347 1404 | Other roofers | San Mateo · San Mateo County | — | — |
| Cbr Services INC DBA Baker's Floor And Surface | Christopher Robert Baker | — | (650) 652 9440 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Cc & Contractor INC | Tomas Pascual | — | (408) 648 9901 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Cedis Construction | Jose Maldonado Sainz | — | (415) 260 4586 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Ceidi Garden Services | Suastegui Ceidi | — | (650) 716 9214 | Windows, patio, painters | Redwood City · San Mateo County | — | — |