| Brendan Clarke | Brendan Clarke | — | (925) 858 9834 | Other | Alamo · Contra Costa County | — | — |
| Brendan J Schmidt | Brendan J Schmidt | — | (925) 934 5744 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Brennan Construction Co INC | Timothy James Brennan | greg@johnbrennanconstruction.com | (818) 624-0711 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Brent Evans | Brent Evans | — | (925) 367 3927 | Other | Concord · Contra Costa County | — | — |
| Brent Howard Russell | Brent Howard Russell | — | (925) 330 8426 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Brent L Potter General Contractor | Brent L Potter General Contractor | — | (510) 685 2053 | GC, remodel, ADU | Rodeo · Contra Costa County | — | — |
| Brent Tryner | Brent Tryner | — | (925) 550 7064 | Other | Antioch · Contra Costa County | — | — |
| Brentwood Cabinet Refacing | Michael Wendell Boyd | — | (925) 525 4743 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Brentwood Electric Co | Troy Tanner Oleson | — | (925) 483 1291 | Electricians | Oakley · Contra Costa County | — | — |
| Brentwood Gardens INC | Debra June Taylor | — | (925) 634 9944 | Windows, patio, painters | Brentwood · Contra Costa County | — | — |
| Brentwood Patio Covers INC | Alan Mathew Lee | — | (925) 489-0690 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Brentwood Plumbing INC | Michael John Sr Mauro | — | (925) 634 3800 | Other | Brentwood · Contra Costa County | — | — |
| Brett Martin Stom | Brett Martin Stom | — | (925) 766 8242 | Other | Walnut Creek · Contra Costa County | — | — |
| Brett Stubbs Const | Brett Stubbs Const | — | (925) 381 8827 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Brian C Rolley | Brian C Rolley | — | (925) 956 6738 | Electricians | Pleasant Hill · Contra Costa County | — | — |
| Brian D Biddle Builders | Brian D Biddle Builders | — | (925) 250 5915 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Brian Feeney Plumbing | Brian Feeney Plumbing | — | (415) 302 5275 | Other | El Cerrito · Contra Costa County | — | — |
| Brian Henley Construction | Brian Christopher Henley | — | (925) 360 4292 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Brian Pickerill | Brian Pickerill | — | (925) 260 6043 | Other | Brentwood · Contra Costa County | — | — |
| Brian Portue | Brian Portue | — | (925) 788 5148 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Brian Smith Tile & Stone INC | Brian Russell Smith | — | (925) 389 3136 | Other | Pittsburg · Contra Costa County | — | — |
| Brickstone Roofing Company | Carlos Alberto Orellana Alvarado | — | (415) 767 6423 | Other roofers | Richmond · Contra Costa County | — | — |
| Bright Ideas Design Center | Bright Ideas Design Center | mark@brightideasdesigncenter.com | (925) 978 1800 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Brightline Landscaping INC | Lopez Ivan Soberanes | — | (925) 708 2725 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Brighton Coulson INC | Russell Keith Schaeffer | devon@brightoncoulson.com | (925) 719 7332 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Bringel-bilt Construction | Michael Daniel Bringel | — | (925) 525 2185 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Briones Custom Painting | Briones Custom Painting | — | (510) 277 2453 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Briones Electric Co | Fernando Jr Hernandez | — | (925) 405 2540 | Electricians | Concord · Contra Costa County | — | — |
| Briones Plumbing | Briones Plumbing | — | (925) 595 0197 | Other | Pittsburg · Contra Costa County | — | — |
| Brisco INC | Briseno Alvaro | — | (510) 827 9137 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Broderson Concrete | Broderson Concrete | — | (510) 379 0311 | Other | Richmond · Contra Costa County | — | — |
| Brookview Landscape INC | Scott Garet Hubbard | brookviewlandscape@gmail.com | (925) 366 8284 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Bros Construction | Juan Carlos Perez-Mejia | jordan@bros-construction.com | (510) 619 4281 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Brosamer & Wall INC | Robert George Brosamer | — | (925) 932 7900 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Brother Interlocking Paver | Brother Interlocking Paver | — | (925) 766 4335 | Other | Pittsburg · Contra Costa County | — | — |
| Brothers Custom Flooring | Juan Manuel Marquez Aguirre | — | (925) 727 9467 | Other | Antioch · Contra Costa County | — | — |
| Brothers Energy Incorporated | Jonathan Carl Armerding | — | (855) 243 9556 | HVAC | Brentwood · Contra Costa County | — | — |
| Brothers Hardwood Flooring | Brothers Hardwood Flooring | — | (415) 602 4394 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Brovelli Construction INC | James Adams Brovelli | — | (925) 258 5000 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| Brown And Caldwell | George Edward Iii Patterson | — | (915) 210 2245 | Other | Walnut Creek · Contra Costa County | — | — |