| Baldwin Backflow Services | Jason Andrew Baldwin | — | (951) 477 7708 | Other | Fallbrook · San Diego County | — | — |
| Baldwin Pool & Spa Services Of S D INC | John Stephen Baldwin | — | (858) 354 7946 | Pool | El Cajon · San Diego County | — | — |
| Balingit Builders INC | Christopher Roland Balingit | guy@infinitydesignbuild.com | (951) 333 3769 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Balk's Welding | Balk's Welding | — | (619) 654 3072 | Other | Lakeside · San Diego County | — | — |
| Ball Construction & Development | David Alan Ball | — | (858) 935 9008 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Ballard Development | Ballard Development | — | (619) 370 6133 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Ballas Plumbing | Ballas Plumbing | — | (760) 815 3201 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Ballestas Construction | Julian Felipe Ballestas | — | (786) 973 5504 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Ballow Construction INC | Paul Albert Ballow | info@ballowconstruction.com | (858) 384 6243 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Balsley Building & Construction | Nicholas Ryan Balsley | aqremodeling2@gmail.com | (619) 635 0110 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| Balt Services INC | Virgil Ponce Enriquez | — | (619) 981 3435 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Baltazar Floorcovering | Baltazar Floorcovering | — | (619) 829 6325 | Other | Chula Vista · San Diego County | — | — |
| Baltazar Luis Floor Covering | Luis Roberto Baltazar | — | (619) 250 0627 | Other | Spring Valley · San Diego County | — | — |
| Baltic Builders | Baltic Builders | — | (858) 335 8787 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Bame Construction Corp | Fernando Jose Rivera | info@bameconstruction.com | (619) 382 4622 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Banaga Construction INC | Frank Banaga | — | (619) 922 8570 | HVAC | Chula Vista · San Diego County | — | — |
| Banales Renovations | Banales Renovations | — | (619) 708 9104 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bancroft Construction Services LLC | Ethan Hancock Driscoll | — | (858) 425 5265 | Windows, patio, painters | La Jolla · San Diego County | — | — |
| Bangin Nails Construction INC | Stephen Leonard Malecha | — | (858) 722 5279 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Banister Landscape | Banister Landscape | — | (858) 395 9149 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Banks INC | Zachary Matthew Banks | — | (858) 945 7933 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Banks Industries | Banks Industries | — | (858) 249 8469 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Banks Matzinger Construction INC | Connor Banks Matzinger | — | (858) 204 1236 | GC, remodel, ADU | Rancho Santa Fe · San Diego County | — | — |
| Banner Construction | Tsai Yaowei | 63132bannerconstructionstl@gmail.com | (858) 837 1035 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Banners Weed Brush And Tree Removal | Chris Banner | — | (760) 213 3903 | Tree | Valley Center · San Diego County | — | — |
| Banning And Son INC | Bruce Guy Banning | info@banningandson.com | (619) 843 6469 | Electricians | Santee · San Diego County | — | — |
| Banyan's Landscape | Banyan Jesus Marquez | banyan_j@live.com | (619) 715 6547 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Banzai Pools INC | Jared Travis Beifuss | info@banzaipools.com | (760) 459 7665 | Pool | Carlsbad · San Diego County | — | — |
| Bar D Bar Landworks INC | Cameron Glenn Drown | — | (760) 207 7808 | Tree | Santa Ysabel · San Diego County | — | — |
| Baraa Badie Hillawi | Baraa Badie Hillawi | — | (619) 414 2119 | HVAC | El Cajon · San Diego County | — | — |
| Barajas Construction | Salvador| Baraj As Salvador Jr Barajas | barajasbuilders@gmail.com | (805) 331-5566 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Baratelli Electric | John Paul Baratelli | eddie.haro@electricare.com | (858) 692 8403 | Electricians | Ramona · San Diego County | — | — |
| Barba Painting | Barba Painting | — | (619) 871 7770 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| Barbabosa Enterprises Incorporated DBA Drains Drains Drains & | Paul Barbabosa | — | (619) 829 0149 | Other | Bonita · San Diego County | — | — |
| Barbara Reed Contractors Pro Cleaning | Barbara Ann Wynn | — | (858) 748 6227 | Other | Poway · San Diego County | — | — |
| Barbara's Landscape Services | Barbara Anne Magargal | — | (619) 328 6136 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Barbat & Stolba INC DBA Scotblinds | David James Barbat | — | (619) 271 5601 | Other | Bonita · San Diego County | — | — |
| Barber Construction LLC | Lewis David Barber | guy@infinitydesignbuild.com | (619) 985 1565 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Barbosa Flooring | Barbosa Flooring | — | (619) 804 3730 | Other | San Diego · San Diego County | — | — |
| Bare Steel INC | Michael Stephen Gamboa | — | (619) 334 1440 | Other | Santee · San Diego County | — | — |