| Build Wise Pro | Chaim Kohlenberg | — | (619) 455 5598 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Build'em General Construction | Campos Manuel | — | (760) 805 1821 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Buildable | Nicolas Parisi Goodman | — | (760) 685 0345 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Buildator | Hamed Hamidnia | info@buildator.net | (858) 945 0718 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Buildcommercial.com | Christopher Scott Kightly | — | (760) 284 5337 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builder's Handyman | Builder's Handyman | — | (619) 827 4545 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Builder's Tech Heating & Air Conditioning | Rolando Romero Amistad | — | (619) 621 4253 | HVAC | Chula Vista · San Diego County | — | — |
| Builder's Window Supply | Builder's Window Supply | logistics@builderswindow.com | (858) 222-6494 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Builders & Beyond LLC | Bricio Angel Lopez | info@buildersandbeyond.com | (858) 222 6222 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builders Collective LLC | Milen Krasimirov Milev | — | (619) 808 8831 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builders Express INC | King Michael | builderexpress@aol.com | (619) 297 2280 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builders Firm | Alsarayji Mhd Moayad | info@buildersfirm.com | (442) 524 4444 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builders Green Remodeling INC | Dahan Eden | guy@infinitydesignbuild.com | (858) 333 7079 | GC, remodel, ADU | La Jolla · San Diego County | — | — |
| Builders Now INC | Christopher Matthew Riha | contact@buildersnow.com | (858) 634 0230 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Builders Plus Restoration | Builders Plus Restoration | — | (760) 215 2335 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Builders Surplus Sales | Builders Surplus Sales | — | (619) 427 5926 | GC, remodel, ADU | National City · San Diego County | — | — |
| Building A Cut Above LLC | Nicholas Samuel Burnthon | — | (858) 568 4684 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Contractors Consortium | Abdur-Rahim Hameed | — | (619) 865 9057 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Contractors San Diego | Building Contractors San Diego | — | (858) 810-3539 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building On The Rock | Jose Luis Cervantes Pulido | — | (951) 251 9164 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Building Owners Elevator Advocates LLC | Eric Donovan Stern | — | (858) 345 0924 | Other | San Diego · San Diego County | — | — |
| Building Resource Management INC | James Walter Riggin | — | (858) 633 5090 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Sd | Miguel Galindo Garcia | — | (661) 900 4781 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Solutions Construction INC | Hugo Fabricio Orozco-Barbosa | guy@infinitydesignbuild.com | (619) 559 1157 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Spaces INC | Amir Bahat | — | (844) 242 8453 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Building Towers | Building Towers | — | (619) 288 2311 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Building With Nature LLC | Taras Petrosiuk | — | (312) 420 5638 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Buildingline Co | Jhordan Noe Arguelles Gonzalez | hello@buildingline.com | (442) 568 4541 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Buildlegacy Contracting INC | Jeremy Ryan Fixsen | — | (760) 458 0464 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Buildmasters Contracting INC | Jeri Lorraine O'keefe | — | (619) 347 1807 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Buildpros INC | Ebrahim Amiri | — | (775) 848 1781 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Buildtech Unlimited INC | Michael James Corless | info@buildtechsandiego.com | (619) 679 7051 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Buildwise INC | Elena Bobrov | — | (619) 368 1100 | Other | San Diego · San Diego County | — | — |
| Buildyneer | Adel Badiee | — | (619) 800 1040 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Built 2 Last Roofing | Alex Robert Gralnic | info@christianroofing.com | (760) 829 8086 | Other roofers | Escondido · San Diego County | — | — |
| Built Better Construction | Thomas Michael Gonzalez | — | (858) 864 3172 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Built Green Construction Corp | Andy-Hieu Da Ngo | — | (909) 569 5322 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Built Pure Inc. | Nicholas Robert Roller | — | (760) 703 4565 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Built Right Construction Co | Gary Lee Rogers | buildzoomsupport@blockrenovation.com | (619) 592 5883 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Built To Build INC | Ruiz Ezequiel Alvarez | info@btbre.nl | (760) 715 8932 | GC, remodel, ADU | Pauma Valley · San Diego County | — | — |