| 1 Dream Home Renovations | Ibarra Rafael Trujillo | dreamhomerenovations@myyahoo.com | (865) 661-1531 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| 123 Construction | John William Jr Faber | — | (909) 941 5200 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 123 Construction LLC | John William Jr Faber | — | (909) 941 5200 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 1st Choice Renovators LLC | Ignacio Jr Zamora | — | (909) 630 3936 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| 210 Construction | James Anthony Jr Phillips | — | (909) 436 0596 | GC, remodel, ADU | Lake Arrowhead · San Bernardino County | — | — |
| 23 Home Improvement | 23 Home Improvement | — | (310) 220 1999 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| 24/7 Carpet & Floor Care INC | Ziyad Saad Alfagir | — | (909) 363 6190 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| 3-d Construction | Darreld Edward Van Westrienen | — | (909) 980 5948 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 3-valley's Construction INC | Kelly Lynn| Lazenby Kelly Lynn Soiles | — | (909) 941 8440 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 360 Building Group Consulting INC | Cameron James Richartz | — | (909) 527 3435 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 3cm Corporation | Alexander Harvey Watts | — | (909) 534 1548 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| 3dxit Construction | Ricardo Castorena | — | (909) 262 4057 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| 3rs Construction Services INC | Reyes Rodriguez Ricardo | — | (909) 571 4515 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| 4 - Ace Construction | Steven James Cooper | — | (909) 944 5400 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 4 - Ace Construction | Joseph Gilbert Jaramillo | — | (424) 506 0731 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| 4 - Con Construction Services | Richard John Garabedian | — | (909) 322 4591 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| 4 Granite INC | Joe Webb | — | (760) 403 3376 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| 4 J Drywall Corp | Retana Hugo Sanchez | — | (909) 539 8108 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| 5 Brother's Painting & General Construction INC | Rafael Perez | — | (909) 648 0408 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| 5 Star Construction And Remodeling INC | Juan Francisco Sanchez Campos | — | (562) 833 4088 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| 626 Plumbing INC | Lu Paul | — | (626) 650 3003 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| 81 Construction INC | Moises Ivan Acosta Garcia | — | (310) 409 9549 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| 86 Design & Build | 86 Design & Build | — | (626) 757 5139 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| 8A Construction Services INC | Ivan Ochoa Moreno | — | (323) 896 3570 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| 90 Degree Construction | Gregory Carrillo Ramos | — | (909) 747 7556 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| 911 Plumbing INC | Omar Luna-Flores | — | (951) 970 8928 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| A & A Builders Group INC | Agustin Mendoza | — | (626) 488 2740 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| A & B General Construction Services | Campos Armando Barrales | armando@abgeneralconstructionservices.com | (626) 252 5785 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| A & C Construction | Paul Alan Argetsinger | — | (760) 910 4202 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| A & O Construction & Design INC | Kc Hahn | — | (323) 482 4262 | GC, remodel, ADU | Pinon Hills · San Bernardino County | — | — |
| A & R Construction | Amir Aatari Sharghi | — | (909) 451 1031 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| A - Industrial Design / Build | Andrew Jason Hernandez | — | (213) 290 0091 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| A - Plus Tec Construction Co | Joshua Seung Il Lee | — | (626) 833 8873 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| A 1 Construction Co | Kwang Hyun Paek | — | (714) 797 9000 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| A A B Innovation Construction & Remodel INC | Becerril Rangel Alberto | — | (909) 714 8499 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| A B C Glass & Screens INC | Petrovic Vladimir | — | (760) 245 8355 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| A B F Construction INC | Anthony Bruce Forcier | — | (909) 425 4277 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| A Better Choice Development INC | Daniel Osvaldo Mangaroni | — | (909) 931 1007 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| A Better Fire Restoration | Daniel Osvaldo Mangaroni | — | (909) 931 1007 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| A Builders California INC | Craig Michael Larsen | — | (323) 719 0872 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |