| Bay Area Stairs INC | Steven Leroy Crews | sales@bayareastairs.com | (800) 310 7824 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Bay Area Tree Pro | Ramirez Rodriguez Mario | — | (415) 712 9165 | Tree | Vallejo · Solano County | — | — |
| Bay Central Construction Group INC | Nasir Khan | — | (209) 996 3711 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Bay Cities Asphalt INC | Trevor Paul Najar | info@baycitiesasphalt.com | (707) 337 7399 | Other | Vacaville · Solano County | — | — |
| Bay County Asphalt | Sammy George Frank Stevens | — | (707) 660 9541 | Other | Dixon · Solano County | — | — |
| Bay Landscaping | Bay Landscaping | — | (707) 656 1201 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Bay Quality Comfort | Bay Quality Comfort | bayqualitycomfort@icloud.com | (925) 915 5354 | HVAC | Benicia · Solano County | — | — |
| Bayardo Tile Co | Bayardo Andrew | — | (707) 720 5896 | Other | Fairfield · Solano County | — | — |
| Bayarea Concrete Works INC | Edgar Juan Lemus Tinoco | edgar.bayareaconcrete@gmail.com | (707) 689 4153 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Bayside Construction | Phuc Van Tran | — | (510) 520 4472 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Bayside Electric | Rosales Rodriguez Alfredo | — | (415) 240 7140 | Electricians | Vallejo · Solano County | — | — |
| Bayside Paving | Bayside Paving | — | (408) 790 7338 | Other | Dixon · Solano County | — | — |
| Bayworx Concrete INC | David Duenas | — | (707) 373 0938 | Other | Dixon · Solano County | — | — |
| Baz Floors | Baz Floors | — | (707) 386 9202 | Other | Fairfield · Solano County | — | — |
| Bbm Construction And Consulting | Thomas Sanford Lindsley | — | (916) 717 8169 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Bc Designs | Bc Designs | — | (707) 426 1775 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Bc Painting | Brandon Lee Nicolas Cardona | — | (925) 914 9174 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Bc-babcock Construciton | Bc-babcock Construciton | — | (707) 486 7978 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Bdjt INC | Taylor Ray Mehlhaff | — | (707) 624 0258 | Pool | Vacaville · Solano County | — | — |
| Bear Flag Wall Repair INC | Richard Aaron Silva | — | (510) 909 8209 | Other | Dixon · Solano County | — | — |
| Bear Tracks Construction | Scott Thomas Taylor | — | (707) 249 6121 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Beastbay Plumbing | Ronald Dewayne Burris | — | (833) 232 7829 | Other | Benicia · Solano County | — | — |
| Beautifully Kolored Painting Co | Aunriek Jeffrey Davis | — | (504) 294 1695 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Bejar Framing | Victor Manuel Bejar Tapia | — | (707) 430 3072 | Other | Suisun City · Solano County | — | — |
| Bell Painting | Bell Painting | — | (707) 447 1643 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Bella Painting | Bella Painting | interested@domainmarket.com | (707) 631 6601 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Bella Window Systems | Bella Window Systems | — | (707) 310 6975 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Bellato Grading | Bellato Grading | — | (707) 567 1548 | Other | Fairfield · Solano County | — | — |
| Bellingham Marine Industries INC | David Walter Day | — | (707) 678 2385 | Electricians | Dixon · Solano County | — | — |
| Belo Floor Covering | Elizabeth Belo | — | (707) 448 8761 | Other | Vacaville · Solano County | — | — |
| Bender Ccp INC | Michael Anthony Potter | info@benderccp.com | (323) 232 2371 | Other | Benicia · Solano County | — | — |
| Benicia Bay Electric | Arthur Nicolas La Riviere | — | (707) 332 4925 | Electricians | Benicia · Solano County | — | — |
| Benicia Cabinetry INC | John Marshall Iii Foottit | — | (707) 746 5440 | Other | Benicia · Solano County | — | — |
| Benicia Floor Company | Wayne Francis Bottini | — | (707) 745 9024 | Other | Benicia · Solano County | — | — |
| Benicia Home Improvement Center INC | Jeffrey Dean Laugen | — | (707) 745 8337 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Benicia Lath & Plastering | Benicia Lath & Plastering | — | (707) 478 0529 | Other | Vallejo · Solano County | — | — |
| Benicia Lawn Maintenence | Benicia Lawn Maintenence | — | (707) 246 5792 | Windows, patio, painters | Benicia · Solano County | — | — |
| Benicia Plumbing INC | Heidi Anna Bucher | — | (707) 745 2930 | HVAC | Benicia · Solano County | — | — |
| Benjamin David Lewis | Benjamin David Lewis | — | (916) 402 8018 | Other | Vacaville · Solano County | — | — |
| Benjamin Rutledge Herston | Benjamin Rutledge Herston | — | (707) 416 7934 | Electricians | Fairfield · Solano County | — | — |