| Big Picture Plumbing | Big Picture Plumbing | bigpictureplumbing18@gmail.com | (408) 551 8670 | Other | Morgan Hill · Santa Clara County | — | — |
| Big Red Dog Electric INC | Edwin Sanchez | clifford.rowley@yahoo.com | (650) 308 5651 | Electricians | Santa Clara · Santa Clara County | — | — |
| Big River Concrete Construction INC | Jose Alberto Hernandez | — | (408) 859 4871 | Other | San Jose · Santa Clara County | — | — |
| Big Z Construction | Zsolt Vagyoczky | — | (408) 622 8021 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Big-j-custom Painting | Big-j-custom Painting | — | (408) 239 9956 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Bigg Tree Rooter Plumbing | Adam Nicholas Colon | — | (408) 373 8484 | Other | San Jose · Santa Clara County | — | — |
| Bill And Lewis Construction | Vines William | — | (650) 218 6048 | GC, remodel, ADU | East Palo Alto · Santa Clara County | — | — |
| Bill Brown Construction Company | William Elwood Brown | — | (408) 297 3738 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Bill Hamilton Roofing INC | William Jon Hamilton | — | (408) 379 1303 | Other roofers | Campbell · Santa Clara County | — | — |
| Bill Lou | Bill Lou | — | (650) 269 6888 | Electricians | Palo Alto · Santa Clara County | — | — |
| Bill's Brush Works INC | William Eugene Sullivan | — | (408) 246 5200 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Bingo Electric | Daniel Marcus Brenner | bingo.office.408@gmail.com | (408) 214 0775 | Electricians | Los Gatos · Santa Clara County | — | — |
| Bingzhi Xing | Bingzhi Xing | — | (408) 888 8280 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Biota Tech Services INC | Robert Brendan Nelson | — | (408) 248 3266 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| Biping Liu | Biping Liu | — | (510) 759 3319 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Birnam Wood Construction Corporation Birnam Wood Builders | Matthew Earl Freshman | — | (518) 330 6288 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Bk Builders | Bk Builders | — | (760) 468 7933 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Blach Construction Company | Catherine Blach Ellington | — | (408) 244 7100 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Blach+cahill Joint Venture | Construction Company Blach | — | (408) 244 7100 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Black Bear Builders INC | Justin Edward Warner | — | (925) 998 5808 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Black Bear Hauling | Black Bear Hauling | info@blackbearhauling.com | (860) 351-7226 | Other | San Jose · Santa Clara County | — | — |
| Black Diamond Construction | Scott Thomas Orlando | — | (831) 206 6895 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Black Diamond Drywall INC | Ochoa Alfonso Rosales | — | (408) 881 3607 | Other | San Jose · Santa Clara County | — | — |
| Black Diamond Masonry Construction | Murillo Daniel Sandoval | — | (408) 422 9960 | Other | Morgan Hill · Santa Clara County | — | — |
| Black Diamond Paver Stones & Landscape INC | Michael George Greenwood | — | (800) 942 1955 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Black Eagle Fire & Security INC | Hosein Parsa | info@blackeagleus.com | (855) 833 3473 | Electricians | Santa Clara · Santa Clara County | — | — |
| Black Maple Landscaping INC | Jose Humberto Ruano | — | (408) 717 3311 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Black Mountain Construction INC | Rozina Cukic | grant@blackmountainconstruction.com | (408) 221 3445 | GC, remodel, ADU | Milpitas · Santa Clara County | — | — |
| Black Rock Electric LLC | Ellis Sebastian Custodio | — | (650) 636 3898 | Electricians | Los Altos · Santa Clara County | — | — |
| Black Sierra Roofing INC | Sanchez Horacio Montalvo | — | (408) 903 9457 | Other roofers | San Jose · Santa Clara County | — | — |
| Black Stone Paving INC | Orozco Luis Santoyo | — | (408) 219 5726 | Other | San Jose · Santa Clara County | — | — |
| Blackstone General Contruction INC | Thinh Truong Ong | — | (408) 785 7777 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Blackwell General Engineering INC | Mark Lee Blackwell | — | (408) 441 1120 | Other | San Jose · Santa Clara County | — | — |
| Blackwood Construction Co | Yooshieh Dizaj Gahramani | — | (408) 826 2922 | Electricians | San Jose · Santa Clara County | — | — |
| Blaettler Construction INC A California Corporation | Peter Charles Blaettler | — | (408) 483 6197 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Blaine Tech Services INC | Keith Conrad Blaine | — | (408) 573 0555 | Other | San Jose · Santa Clara County | — | — |
| Blanco Tile And Stone | Blanco Tile And Stone | — | (408) 639 1480 | Other | San Jose · Santa Clara County | — | — |
| Bless Electric INC | Mohsen Haji Jalili | blesselec@yahoo.com | (408) 499 6595 | Electricians | Cupertino · Santa Clara County | — | — |
| Blessed Construction | Wang Huikang | — | (408) 230 3658 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Bleu Industries INC | Franklin Aaron Ballesteros Alzamora | info@bleuindustries.com | (925) 366 9993 | Other | Mountain View · Santa Clara County | — | — |