| Brt Builder | Brt Builder | — | (510) 552 0574 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Brt Development | Brian Robert Tall | — | (510) 552 0574 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Bruce Martin Clark | Bruce Martin Clark | — | (510) 414 6873 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Bruce Sin Construction | Thay Tai Sin | — | (510) 520 2966 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Bruce Teel Associates | Bruce Joseph Teel | — | (415) 999 2690 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Bruce Veldhuizen Custom Furniture & Cabinetry | Bruce Duane Veldhuizen | — | (510) 536 4788 | Other | Oakland · Alameda County | — | — |
| Bruce Williams Wood Floors | Bruce Williams Wood Floors | — | (510) 652 8121 | Other | Oakland · Alameda County | — | — |
| Brushpros | Luke Aaron Otterstad | — | (510) 339 9991 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Bryan Ashton General Contractor | Bryan Ashton General Contractor | — | (415) 608 3037 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Brycin Contruction Company | Bryon Scott Dalrymple | — | (510) 366 1335 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Bryland Contracting And Electrical | Brian Paul Pesicka | — | (925) 285 0736 | Electricians | Dublin · Alameda County | — | — |
| Btv Construction | Benjamin Thomas Villegas | bobvelkov878@gmail.com | (510) 501 1232 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Buchmann INC | Radu Andrei Buchmann | — | (510) 512 5555 | Electricians | Castro Valley · Alameda County | — | — |
| Buckeye | Brandon Richard Winter | — | (510) 325 9316 | Windows, patio, painters | Emeryville · Alameda County | — | — |
| Buckley Plumbing And Engineering INC | Patrick Thomas Buckley | — | (510) 723 0001 | Other | Hayward · Alameda County | — | — |
| Budget Blinds Of Pleasanton | Miguel Franco | — | (925) 230 8987 | Other | Dublin · Alameda County | — | — |
| Budget Electric | Michael Albert Issac | — | (510) 509 2975 | Electricians | Fremont · Alameda County | — | — |
| Budget Sewer INC | Aidan Tony Honeyman | — | (510) 986 0244 | Other | Oakland · Alameda County | — | — |
| Budget Window Coverings LLC | Miguel-Antonio Racelis Isip | — | (707) 319 9368 | Other | Hayward · Alameda County | — | — |
| Buestad Construction INC | John Christian Jr Buestad | — | (510) 523 1925 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Buffi Painting INC | Mark Francis Buffi | — | (925) 484 1115 | Windows, patio, painters | Pleasanton · Alameda County | — | — |
| Bugler Construction | Glenn Thomas Bugler | — | (925) 416 0700 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Build Blvd | Build Blvd | — | (510) 846 9734 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Builder Plus Construction LLC | Lee Ghee Chng | — | (415) 309 0641 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Buildergibbs INC | Matthew Whitney Gibbs | — | (415) 652 2665 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Builders Unlimited INC | Arturo Pelayo Diaz | — | (510) 783 1979 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Building Green Projects | Building Green Projects | — | (415) 823 2699 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Building Lab | Stephen Hulme Shoup | info@buildinglab.com | (510) 420 1133 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Building Revisited | Building Revisited | — | (510) 526 8780 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Buildmark INC | Marcu Emanuel | — | (510) 484 5765 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Buildwise Z Construction LLC | Yongqi Lin | — | (510) 815 6666 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Buildzig | Laura Elizabeth Blair | — | (800) 380 0180 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Builopment Corporation | Kwong Wa Szeto | — | (510) 289 0283 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Builtwell Construction | Laboy Sammy | — | (510) 376 7917 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Builtwell Construction INC | Renee Marie Driscoll | — | (209) 815 3309 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Bullfrog Plumbing LLC | Justin Anthony Mason | — | (510) 258 1314 | Other | Oakland · Alameda County | — | — |
| Bulterman Electric | Robert Spencer Bulterman | — | (408) 568 2118 | Electricians | Berkeley · Alameda County | — | — |
| Bumi Construction INC | Gopalan Ravindhar | — | (341) 228 4313 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Bundy Company | Randal Keith Bundy | — | (510) 390 1269 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Bunker Hill Construction | Fredric Gerard Bunkers | — | (510) 908 0499 | GC, remodel, ADU | Oakland · Alameda County | — | — |