| Bcmi Painting | Bcmi Painting | — | (408) 509 9862 | Windows, patio, painters | Brentwood · Contra Costa County | — | — |
| Bco Incorporated | Brian Christopher O'leary | — | (925) 687 3000 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Bcr Construction Corporation | Reyes Franklin Rosales | — | (925) 428 7640 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Bcs INC | Thomas Doyle Hastings | — | (925) 553 7443 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Bcs Landscape Construction | Brian Christopher Schwertscharf | — | (925) 808 5475 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Bd Con | Bd Con | — | (925) 588 5968 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Bdc Baird Development And Construction INC | Joshua Lee Baird | — | (925) 400 8003 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Bdc Landscape | Bdc Landscape | info@bdclandscape.com | (510) 909 6828 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Bds Plumbing INC | Brett Martin Stom | info@bdsplumbing.com.au | (925) 947 1237 | Other | Walnut Creek · Contra Costa County | — | — |
| Beamans INC | Michael Denis Beaman | — | (510) 658 0361 | Electricians | Danville · Contra Costa County | — | — |
| Bear Coatings INC | Wahidi Naweed | — | (925) 444 8366 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Bear Creek Construction | Joshua Lee Shryack | — | (925) 385 8658 | Electricians | Concord · Contra Costa County | — | — |
| Bear Landscaping And Paver | Bear Landscaping And Paver | — | (925) 430 4161 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Bear Remodeling INC | Harush Idan | — | (925) 567 3021 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Bear River Builders Incorporated | Richard Trevor Perry | — | (530) 277 1921 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Bear Technology INC | Gregory Dean Ludwig | — | (925) 234 1531 | Other | Brentwood · Contra Costa County | — | — |
| Beard Co | Eric Gene Beard | — | (925) 963 2330 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Bearscapes L L C | Colby Raul Villasenor | — | (925) 240 6311 | Windows, patio, painters | Brentwood · Contra Costa County | — | — |
| Beau Severs | Beau Severs | — | (925) 584 4501 | Other | Byron · Contra Costa County | — | — |
| Beaver's Construction Company | Daniel Keith Jolivette | — | (925) 303 9169 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Bebo's Construction | Lance Ronald Bebo | — | (925) 708 7300 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Beckner Contracting & Management INC | Craig William Beckner | — | (925) 930 8280 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Beckwith Builders | Beckwith Builders | — | (925) 625 3853 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Begonia Builds Corporation | Peter Jonathan Mcneff | — | (925) 708 1560 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Behring Construction | Jeffrey Kenneth Behring | — | (925) 890 9883 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Beki Home Repairs | Beki Home Repairs | — | (510) 499 4583 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Bel Air Mechanical INC | Bruce Sterling Campbell | bruce@belairmechanical.com | (925) 609 9655 | HVAC | Martinez · Contra Costa County | — | — |
| Belfast Plumbing | Belfast Plumbing | — | (925) 457 5423 | Other | Concord · Contra Costa County | — | — |
| Bella Marley Tile & Stone | Bella Marley Tile & Stone | — | (925) 382 9441 | Other | El Sobrante · Contra Costa County | — | — |
| Bella Vista Diamond Interlocking Pavers | Jimenez Santos Carrillo | — | (707) 704 5818 | Other | Richmond · Contra Costa County | — | — |
| Bellagio Pavers INC | Palmer Ferreira Iriarte | contact@bellagiopaversinc.com | (510) 672 6214 | Other | Richmond · Contra Costa County | — | — |
| Bells Plumbing Solutions | Brian Ashley Bell | brian@bellsplumbingsolutions.com | (662) 260 2646 | Other | Walnut Creek · Contra Costa County | — | — |
| Belvedere Construction LLC | Piotr Stanislaw Pondel | — | (408) 438 8508 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Ben Gar Constructions Services INC | Rosales Benito Garcia | — | (925) 787 2352 | GC, remodel, ADU | Bay Point · Contra Costa County | — | — |
| Ben's Tile And Stone | Ben's Tile And Stone | — | (925) 382 9692 | Other | Oakley · Contra Costa County | — | — |
| Benchmark Home Construction INC | Jason Everett Bliss | — | (925) 575 7859 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Bendana Drywall INC | Fabio Rene Bendana | — | (650) 303 7621 | Other | Pinole · Contra Costa County | — | — |
| Benedetto's Additions | Benedetto's Additions | — | (925) 330 2208 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Benevent Building | Benevent Building | — | (925) 595 5338 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Benjamin Winn | Benjamin Winn | — | (925) 303 8475 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |