| B Sam Iler | B Sam Iler | — | (619) 654 4055 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| B Squared Heating And Air | Brandon Michael Ballow | eben@eyebytes.com | (619) 669 8762 | HVAC | Ramona · San Diego County | — | — |
| B Stewart Construction | Stewart Brendan | — | (619) 708 8353 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| B T C Framing INC | William Robert Tarling | — | (760) 727 7007 | GC, remodel, ADU | Vista · San Diego County | — | — |
| B T Construction | Thiel Brad | — | (619) 993 1967 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| B V M Construction INC | Jose Martin Rivas | — | (619) 227 4304 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| B W B Contractors INC | Ben Wesley Brady | — | (760) 275 7524 | GC, remodel, ADU | Vista · San Diego County | — | — |
| B W Clark Co | Bruce William Clark | — | (760) 749 3477 | GC, remodel, ADU | Valley Center · San Diego County | — | — |
| B W Drywall INC | Brad Scott Wilson | — | (760) 727 7838 | Other | Carlsbad · San Diego County | — | — |
| B W S Construction INC | Bruce William Smith | — | (619) 994 0207 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| B Z Plumbing | Buki Zoltan | info@bzplumbing.com | (619) 370 1942 | Other | Spring Valley · San Diego County | — | — |
| B&a Landscape INC | Bertin Alva-Alvarez | — | (760) 566 8437 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| B&b Mechanical INC | Terrence Christopher Lewis | dispatch@bbmechanicalinc.com | (619) 713 0400 | HVAC | Lakeside · San Diego County | — | — |
| B&h Hernandez Construction INC | Chavez Baltasar Hernandez | — | (760) 201 7899 | GC, remodel, ADU | Vista · San Diego County | — | — |
| B&l Drywall INC | Brian Enriquez | — | (619) 493 8619 | Other | San Diego · San Diego County | — | — |
| B-general INC DBA Cv Construction And Restoration Services | Carlos Alberto Vazquez Ramirez | — | (619) 769 3381 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| B. Luna Pro-painting | B. Luna Pro-painting | — | (619) 921 1844 | Windows, patio, painters | Escondido · San Diego County | — | — |
| B3 Construction INC | Andrew Lee Iii Bean | — | (619) 246 8520 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| Baak Painting Services INC | Canelo Armando Hurtado | info@baakpaintingservices.com | (708) 830 8093 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Babak Landscaping Co | Soltani Babak | — | (760) 846 3570 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Babine Electric INC | Jose Guadalupe Diaz-Barriga | eddie.haro@electricare.com | (760) 522 9710 | Electricians | Fallbrook · San Diego County | — | — |
| Baby Guard Pool Fence Installations | Baby Guard Pool Fence Installations | — | (760) 443 1159 | Other | Vista · San Diego County | — | — |
| Babylon Remodeling | Roy Joseph | — | (619) 733 6743 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Baca Construction | Jesus Alonso Baca-chavez | — | (619) 512 7656 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Back Country Concrete | Back Country Concrete | — | (619) 540 3346 | Other | Alpine · San Diego County | — | — |
| Back Country Construction INC | Lee Montgomery | — | (760) 500 5650 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Back Country Mechanical INC | Oscar Edward Traubel | oscar_bcm@yahoo.com | (619) 478 9099 | HVAC | Pine Valley · San Diego County | — | — |
| Back's Construction INC | David Gene Back | — | (619) 713 2566 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Backcountry Analytical Construction | Matthew Donald Earnhart | buildzoomsupport@blockrenovation.com | (619) 368 2955 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| Backflow Services INC | Thomas Wayne Jr Allingham | — | (619) 303 1561 | Other | Santee · San Diego County | — | — |
| Backyard Built Construction | Josue Rodriguez Najar | — | (760) 717 7106 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Backyard Pool And Spa Service INC | Jericho Walter Bartlett | — | (619) 301 3920 | Pool | San Diego · San Diego County | — | — |
| Backyard Solutions San Diego | Backyard Solutions San Diego | — | (760) 277 8975 | Other | Escondido · San Diego County | — | — |
| Bacon Painting & Decorating | Bacon Painting & Decorating | — | (760) 716 7307 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Badeaux Construction | John Joseph Badeaux | — | (760) 583 9404 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Badger Construction INC | Rory Russell Erb | — | (858) 344 3743 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Badger's Earthscapes | Badger's Earthscapes | — | (619) 466 8569 | Windows, patio, painters | La Mesa · San Diego County | — | — |
| Baer Enterprises | William Richard Baer | — | (619) 287 8283 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Baez Landscape Services | Michael Eldridge Mc Iver | — | (619) 987 3595 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Bahena's Construction INC | Victor Manuel Bahena | — | (619) 765 9030 | GC, remodel, ADU | National City · San Diego County | — | — |