| 2H Construction INC | Sean Ralph Hitchcock | — | (562) 424 5567 | GC, remodel, ADU | Signal Hill · Los Angeles County | — | — |
| 2h2n Construction INC | Vahan Haroution Karakossian | — | (626) 354 3940 | GC, remodel, ADU | Pasadena · Los Angeles County | — | — |
| 2K Sheet Metal Company | Luis Carlos Jr Madero | — | (213) 507 6827 | Other | Los Angeles · Los Angeles County | — | — |
| 2M Electric INC | Menachem Mendel Wilhelm | menachem@2m-electric.com | (323) 364 2098 | Electricians | Los Angeles · Los Angeles County | — | — |
| 2M Plumbing INC | Jaime Danilo Monterroso Mcclaughlin | — | (800) 815 4580 | Other | Van Nuys · Los Angeles County | — | — |
| 2ne1 Roofing | Jeong Kang | — | (213) 925 6677 | Other roofers | Los Angeles · Los Angeles County | — | — |
| 2R Plumbing INC | Jose Antonio Ore | — | (323) 629 5341 | Other | Los Angeles · Los Angeles County | — | — |
| 2R Remodel | 2R Remodel | — | (818) 968 8860 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| 2wg Construction INC | Kevin Sangsoo Byun | — | (213) 388 6884 | GC, remodel, ADU | La Crescenta · Los Angeles County | — | — |
| 2xm Hardwood Floors | Melvin Estuardo Herrera Y Herrera | — | (310) 237 5848 | Other | Lawndale · Los Angeles County | — | — |
| 3 & 1 Plumbing INC | Sanchez Octavio Elias | — | (818) 605 8601 | Other | Winnetka · Los Angeles County | — | — |
| 3 - B'z Painting Co | Kohavi Anita | — | (818) 752 7613 | GC, remodel, ADU | Van Nuys · Los Angeles County | — | — |
| 3 A Contract Builders INC | Araceli Zambrano Esparza | — | (562) 307 2890 | GC, remodel, ADU | Lynwood · Los Angeles County | — | — |
| 3 A Stone Tops INC | Adolfo Tal - Layo Bernabeo | — | (310) 800 8391 | Other | Carson · Los Angeles County | — | — |
| 3 A's Construction | Agustin Sr Gutierrez | — | (310) 350 3636 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| 3 At Once INC | Robert David Charles | — | (818) 521 0361 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| 3 Clover Group LLC | Jonathan Matthew Cheung | — | (424) 438 0380 | GC, remodel, ADU | Norwalk · Los Angeles County | — | — |
| 3 Color Flax Landscaping | 3 Color Flax Landscaping | — | (818) 581 8512 | Windows, patio, painters | Winnetka · Los Angeles County | — | — |
| 3 D Electric INC | Sanchez Diego | — | (951) 941 4391 | Electricians | Los Angeles · Los Angeles County | — | — |
| 3 Dim Construction | Jose Felipe Padilla | — | (661) 645 5673 | GC, remodel, ADU | Canyon Country · Los Angeles County | — | — |
| 3 E Group INC | Brian Beauford Phelps | — | (818) 781 7171 | Other | Van Nuys · Los Angeles County | — | — |
| 3 Edge Electric INC | Casas Silverio Navarrete | — | (626) 290 9118 | Electricians | Baldwin Park · Los Angeles County | — | — |
| 3 Element Fire Protection | 3 Element Fire Protection | — | (626) 497 2604 | Other | Rosemead · Los Angeles County | — | — |
| 3 Eleven Doors & Gates INC | Juan M Fernandez Diaz | — | (818) 913 5961 | Other | Arleta · Los Angeles County | — | — |
| 3 J Construction | Rodelio Quizon Santos | — | (562) 406 2292 | GC, remodel, ADU | Norwalk · Los Angeles County | — | — |
| 3 Kings Associates INC | Zipporah Maria Patton | — | (310) 215 9940 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 3 Phase Electric Co | Corral Orlando | kent@phaseelectric.com | (214) 808-1003 | Electricians | Whittier · Los Angeles County | — | — |
| 3 Phase Electric Co | Malin Ansara Wright | kent@phaseelectric.com | (214) 808-1003 | Electricians | Lancaster · Los Angeles County | — | — |
| 3 Pinos INC | Bartolo Lopez | — | (818) 349 8226 | Windows, patio, painters | Northridge · Los Angeles County | — | — |
| 3 Sands Handyman LLC DBA Flora Scott Construction | Scott David Flora | — | (661) 317 6300 | GC, remodel, ADU | Palmdale · Los Angeles County | — | — |
| 3 Seven 10 Enterprise | 3 Seven 10 Enterprise | — | (818) 336 7336 | Electricians | Glendora · Los Angeles County | — | — |
| 3 T Media INC | Joseph Dizor Tolentino | — | (714) 227 6057 | Other | Diamond Bar · Los Angeles County | — | — |
| 3 Ten Builders INC | Adam Paul Hammett | — | (805) 298 2254 | GC, remodel, ADU | Porter Ranch · Los Angeles County | — | — |
| 3 Ten Plumbing INC | John Darold Senesac | — | (310) 461 9691 | Other | Torrance · Los Angeles County | — | — |
| 3 Trades Construction | Hernandez Alejandro Martinez | — | (818) 619 1328 | GC, remodel, ADU | North Hills · Los Angeles County | — | — |
| 3 V Signs & Graphics LLC | Patric Gene Dacy | — | (310) 372 0888 | Other | Torrance · Los Angeles County | — | — |
| 3 Woodworkers INC | Jorge Oscar De Jesus Escorcia | — | (818) 518 3075 | Other | Northridge · Los Angeles County | — | — |
| 3-d General Construction | Shillian Ramin | — | (310) 707 8445 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| 3-m Electric | Ramzy Ragheb Gundy | shea@m-electric.com | (310) 989 7309 | Electricians | Rancho Palos Verdes · Los Angeles County | — | — |
| 3000 Construction | Enrique Hernandez Escareno | — | (310) 946 6643 | GC, remodel, ADU | Hawthorne · Los Angeles County | — | — |