| Bill's Custom Wood | Bill's Custom Wood | — | (619) 208 2078 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| Bill'z Electric | William Hubert Jr Mendoza | contact@claycoelectric.org | (619) 482 8474 | Electricians | Chula Vista · San Diego County | — | — |
| Billtwell Construction | William Robert Savory | — | (619) 777 9590 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| Billy Time INC | William Reuben Lopez | — | (619) 251 4631 | HVAC | Spring Valley · San Diego County | — | — |
| Bilt Electric INC | Christopher Terry Tagg | admin@biltelectric.com | (858) 213 9879 | Electricians | Poway · San Diego County | — | — |
| Bingchao Wang | Bingchao Wang | guy@infinitydesignbuild.com | (626) 999 7921 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Bingham Construction Company INC | Jeffrey Garver Bingham | — | (858) 675 0875 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bingham Electric | Douglas Wayne Bingham | info@indiantypefoundry.com | (619) 715 3675 | Electricians | Santee · San Diego County | — | — |
| Bingham Plumbing | Craig Scott Bingham | — | (760) 805 0949 | Other | Oceanside · San Diego County | — | — |
| Bioeve | David Michael Johnston | — | (858) 375 8911 | Windows, patio, painters | Cardiff · San Diego County | — | — |
| Biosources INC | Laura Ann Griffin | info@biosourcesinc.com | (858) 752 8722 | HVAC | San Diego · San Diego County | — | — |
| Birchfield Construction INC | Jared Andrew Birchfield | birchfieldconstruction@yahoo.com | (619) 985 5812 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bird Restraint And Deterrent Systems | Bird Restraint And Deterrent Systems | — | (951) 348 7542 | Other | Fallbrook · San Diego County | — | — |
| Birge Builders | Birge Builders | — | (703) 472 0367 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Bishop Build INC | William Frederick Iii Bishop | bill@bishopbuild.com | (408) 887 8361 | GC, remodel, ADU | Del Mar · San Diego County | — | — |
| Bishop Builders INC | Ronald Ian Bishop | interested@domainmarket.com | (760) 420 5347 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Bishop Construction | Jason Richard Bishop | admin@bishopconstruction.com | (858) 525 3736 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Bishop Windows | Bishop Windows | — | (619) 252 1056 | Windows, patio, painters | Lakeside · San Diego County | — | — |
| Bishop's Tree Service INC | Brian Edward Bishop | — | (760) 720 9649 | Tree | Encinitas · San Diego County | — | — |
| Bison Constructors INC | Jason Craig Cheney | — | (619) 743 0823 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bitar Construction | Bitar Julian | — | (619) 778 9923 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Bitterend Ventures INC DBA B V I Solar | Tyler Paul Field | — | (877) 284 1222 | Other roofers | San Diego · San Diego County | — | — |
| Bittner Enterprises | James George Bittner | — | (760) 213 1199 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Bittner Painting | Bittner Painting | — | (619) 665 9860 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Bix Built INC | John James Bixler | mike@bixbuilt.com | (760) 583 7313 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Bize Mechanical Solutions | Bize Mechanical Solutions | info@sherlockair.com | (619) 289 9024 | HVAC | Chula Vista · San Diego County | — | — |
| Bizznet Services | Joseph Lewis Hurtado | contact@claycoelectric.org | (619) 871 1462 | Electricians | San Diego · San Diego County | — | — |
| Bj Construction Group INC | Lopez Ivan Fernandez | — | (206) 601 7876 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bj's Construction Solutions INC | Solorio Barajas Benjamin | — | (619) 707 9393 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bjornbear Remodeling LLC | William E Berry | guy@infinitydesignbuild.com | (512) 294 7783 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Bk Renovations LLC | Austin Michael Jones | — | (949) 501 0033 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bkb Enterprises INC | Brad Kevin Block | — | (619) 913 0033 | GC, remodel, ADU | Bonsall · San Diego County | — | — |
| Bl Attic Professional INC | Luu Bryan | — | (619) 597 5514 | Other | Santee · San Diego County | — | — |
| Black Clouds Construction | Gehovan Yamil Guzman-curiel | buildzoomsupport@blockrenovation.com | (619) 573 3836 | GC, remodel, ADU | Jacumba · San Diego County | — | — |
| Black Deer Construction INC | Ruben Jr Ruvalcaba | aqremodeling2@gmail.com | (619) 376 5746 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Black Diamond Commercial Construction | Devin Lawrence Beale | — | (858) 204 8277 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Black Diamond Construction | Scott Alan Dobias | — | (760) 917 0562 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Black Diamond Consulting INC | Christopher Courtney Aguilar | — | (619) 472 3809 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Black Hawk Electric Company INC | John F Iv Funderburg | — | (619) 286 0360 | Electricians | Escondido · San Diego County | — | — |
| Black I P O /barnhart - Reese Jv | Blackipo | — | (858) 592 6500 | GC, remodel, ADU | San Diego · San Diego County | — | — |