| Black Diamond Electric Co | Austin Michael Tobia | — | (831) 207 1955 | Electricians | San Juan Bautista · San Benito County | — | — |
| Blair Concrete Construction | Enriquez Santos | — | (209) 509 9418 | Other | Hollister · San Benito County | — | — |
| Blue Belt Construction | Blue Belt Construction | constructionbluebelt@gmail.com | (619) 618-1858 | Restoration | Chula Vista · San Benito County | — | — |
| Blue Diamond Sales & Rentals - Encinitas Property Management | Blue Diamond Sales & Rentals - Encinitas Property Management | — | (760) 230-0673 | Property managers | Encinitas · San Benito County | — | — |
| Blue J Electric | Jesus Nicolas Noriega | — | (831) 297 7107 | Electricians | Hollister · San Benito County | — | — |
| Bnf Property Management | Bnf Property Management | — | (760) 637-8100 | Property managers | Encinitas · San Benito County | — | — |
| Borges Construction | Michael Robert Borges | — | (831) 245 7640 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Bourdet Construction INC | Mitchell Emile Bourdet | — | (831) 202 1904 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Brad Lawrence Mechanical INC | Bradley Steven Lawrence | — | (408) 847 6717 | HVAC | Hollister · San Benito County | — | — |
| Brandon Brown Construction Company | Brandon Eric Brown | — | (831) 801 9874 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Brigantino Dirt Works LLC | Christopher August Brigantino | — | (831) 207 1037 | Other | Tres Pinos · San Benito County | — | — |
| Brigantino Irrigation INC | Chris August Brigantino | info@brigantinoirrigation.com | (831) 636 1188 | Other | Hollister · San Benito County | — | — |
| Budget Blinds Of Monterey Bay | Budget Blinds Of Monterey Bay | — | (831) 262 5248 | Other | Hollister · San Benito County | — | — |
| Budget Windows | Budget Windows | info@budgetwindowsencinitas.com | (619) 492-7899 | Windows, patio, painters | Encinitas · San Benito County | — | — |
| Buena Vista Painting | Buena Vista Painting | mariovalencia685@gmail.com | (831) 348 4701 | Windows, patio, painters | Hollister · San Benito County | — | — |
| Bugbug Pest Control | Bugbug Pest Control | contact@gobugbug.com | (760) 659-7357 | Pest, tile roofs | San Marcos · San Benito County | — | — |
| Building Enterprises INC | Michael Edward Dunn | — | (831) 637 9056 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Burras Drywall & Taping INC | Juan Luis Jimenez Rosales | — | (831) 205 8032 | Other | Hollister · San Benito County | — | — |
| C And J Maintenance Construction INC | Sanchez Julie | — | (650) 605 5671 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| C M T Woodcraft | C M T Woodcraft | — | (408) 288 5771 | Other | Hollister · San Benito County | — | — |
| C S Electric | Christopher Paul Sabala | — | (831) 207 2556 | Electricians | San Juan Bautista · San Benito County | — | — |
| Cagle Electric | Leroy Andrew Cagle | — | (408) 460 7191 | Electricians | Hollister · San Benito County | — | — |
| Cal Builds INC DBA Cal Floors | Salvador Ayala Hernandez | — | (831) 320 5579 | GC, remodel, ADU | San Juan Bautista · San Benito County | — | — |
| Cal Custom Construction | Dennis Michael Fought | — | (408) 529 6001 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| Cal Heating & Air INC | Juventino Rodriguez | — | (831) 207 6649 | HVAC | Hollister · San Benito County | — | — |
| Cal-West Property Inspections | Cal-West Property Inspections | — | (760) 679-5659 | Inspectors | Escondido · San Benito County | — | — |
| Calcoast HVAC L.l.c. | Calcoast HVAC L.l.c. | — | (760) 210-8781 | HVAC | San Marcos · San Benito County | — | — |
| Calcor Drywall INC | Hugo D Calderon Vargas | — | (831) 265 3862 | Other | Hollister · San Benito County | — | — |
| Cali Door Systems | Cali Door Systems | — | (408) 607 2245 | Other | Hollister · San Benito County | — | — |
| Cali-west Communications INC | Jose Oswaldo Corona Jimenez | — | (408) 373 5532 | Other | Hollister · San Benito County | — | — |
| California Construction Company | Arthur Jr Correa | — | (831) 636 8922 | GC, remodel, ADU | Hollister · San Benito County | — | — |
| California Custom Countertops INC DBA California Granite & Stone | Alexis Ariana Ramirez | — | (831) 245 6200 | Other | Hollister · San Benito County | — | — |
| California Overhead Door | California Overhead Door | interested@domainmarket.com | (831) 636 2904 | Other | Hollister · San Benito County | — | — |
| California Pools San Diego North | California Pools San Diego North | — | (760) 227-5415 | Pool | San Marcos · San Benito County | — | — |
| California Top Drywall INC | Jason Javier Lara Hernandez | — | (408) 417 0981 | Other | Hollister · San Benito County | — | — |
| California Tree Service | Perez Bribiesca Diego | — | (831) 902 3727 | Tree | Hollister · San Benito County | — | — |
| Calwerks LLC | Dustin Eric Riethmaier | — | (512) 296 1543 | Other | Hollister · San Benito County | — | — |
| Carino's Masonry INC | Martin Pedro Carino Mendez | camasonry@yahoo.com | (831) 524 8779 | Other | Hollister · San Benito County | — | — |
| Carlos J Romero Grading And Paving Contractors INC | Carlos J Romero | — | (408) 763 5800 | Other | Hollister · San Benito County | — | — |
| Carmel Valley Contracting | Carmel Valley Contracting | — | (858) 922-7285 | GC, remodel, ADU | Del Mar · San Benito County | — | — |