| Bear Trac Builder | Bear Trac Builder | — | (707) 280 2268 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Beaudry Construction | Martin Richard Beaudry | — | (707) 483 9326 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Beaver Built Constructor | Beaver Built Constructor | tory@beaverbuiltconstructor.com | (415) 407 6072 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Beck Communications INC | Barry Jahmal Yant | — | (707) 762 2002 | Other | Petaluma · Sonoma County | — | — |
| Beck Floors | Beck Floors | — | (760) 937 3529 | Other | Santa Rosa · Sonoma County | — | — |
| Bedrock Concrete Construction INC | Soriano Ortiz Alfonso | — | (707) 696 5447 | Other | Petaluma · Sonoma County | — | — |
| Bedrock Construction Co | Elmer Eugene Jr Kurtek | info@bedrockconstruction.com | (707) 849 4570 | GC, remodel, ADU | Guerneville · Sonoma County | — | — |
| Bee Vera Construction INC | Jose Eduardo Sr Vera Velazquez | — | (707) 335 6811 | GC, remodel, ADU | Healdsburg · Sonoma County | — | — |
| Beeler INC | Shawn Anthony Beeler | — | (707) 888 8881 | Other | Santa Rosa · Sonoma County | — | — |
| Behler Construction Company | Michael Sid Behler | — | (707) 545 4761 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Belinda Sue Andrews DBA Andrews And Associates | Belinda Sue Andrews | — | (707) 477 2454 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Bella Forza Construction | Sergio Franco Fazio | — | (707) 888 9446 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Bella Sol Systems LLC | Cameron Young Park | — | (707) 332 4816 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Belvedere Construction INC | Dino Edward Minatta | — | (707) 481 3109 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Ben Barba Plumbing INC | Barba Benjamin Gomez | barbagom104@gmail.com | (707) 477 2929 | Other | Santa Rosa · Sonoma County | — | — |
| Benavidez INC | Benavidez-daniel Febronio | firstname@benavidez.com | (415) 827 3032 | Tree | Cotati · Sonoma County | — | — |
| Bench Mark West | Bench Mark West | — | (707) 331 0885 | GC, remodel, ADU | Kenwood · Sonoma County | — | — |
| Bender Concrete | Bender Concrete | — | (707) 974 8768 | Other | Petaluma · Sonoma County | — | — |
| Benelli Roofing | Benjamin Allen Benelli | — | (707) 889 9161 | Other roofers | Sebastopol · Sonoma County | — | — |
| Benjamin Bryant Construction INC | Benjamin Andrew Bryant | hi@typemade.mx | (707) 535 9283 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Benjamin Building Services | Tom Benjamin Warton | — | (415) 897 1700 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Benjamin Skiles | Benjamin Skiles | — | (949) 878 7130 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Bennetts Painting | Bennetts Painting | — | (415) 827 1730 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Benson Electric | William Stephen Benson | — | (707) 477 7324 | Electricians | Santa Rosa · Sonoma County | — | — |
| Berger Concrete INC | Robert Stephen Berger | — | (707) 935 3805 | Other | Vineburg · Sonoma County | — | — |
| Berios Construction INC | Eliseo Ernesto Berios | everios82@yahoo.com | (415) 261 0620 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Berkshire Development Corporation | Jacob David Ii Lehrer | — | (707) 694 5460 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Bernard's Interiors | Bernard's Interiors | — | (707) 528 1855 | Other | Santa Rosa · Sonoma County | — | — |
| Bert Young | Bert Young | — | (707) 938 9176 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Bertalon Construction | Nicholas Charles Bertalon | — | (707) 293 3567 | Other | Healdsburg · Sonoma County | — | — |
| Bertolucci Construction | Mark Chris Bertolucci | — | (707) 481 6262 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Bertram / Blondina Handrail And Stair INC | Francis August Blondina | — | (707) 584 8485 | Other | Rohnert Park · Sonoma County | — | — |
| Bertram Pools INC | Jerry Brenton Bertram | jerry@bertrampools.com | (707) 484 8640 | Pool | Santa Rosa · Sonoma County | — | — |
| Best Chance Heating And Cooling | Chance Melzar Rosado | — | (707) 900 8381 | HVAC | Santa Rosa · Sonoma County | — | — |
| Best Way Mechanical INC | Raed Nabil Hinawi | — | (888) 800 2171 | Other | Rohnert Park · Sonoma County | — | — |
| Betancourt Painting Partnership | Nancy Lorena Rangel Olivares | — | (415) 233 5520 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Bethlamb Construction | Danny Ernest Lambeth | — | (707) 349 7804 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Better Built Homes Building Contractor | Tobin Barclay Smith | — | (707) 332 0401 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Better Holmes Construction | Christopher Wayne Holmes | — | (707) 237 1200 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Bf Builders INC | Thomas Allen Burke | info@bfbuilders.com | (707) 974 0578 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |