| 45 Degrees Finish Carpentry INC | Miguel Angel Adame | — | (323) 810 0993 | Other | Alhambra · Los Angeles County | — | — |
| 457 Pool INC | Bradley Edward Stanley | — | (310) 457 7665 | Pool | Malibu · Los Angeles County | — | — |
| 4645 Gb LLC DBA Jem Construction & Development | James Moushoul | — | (310) 560 3700 | GC, remodel, ADU | Sherman Oaks · Los Angeles County | — | — |
| 4clover Construction | Wang Zhonghua | — | (626) 997 0077 | GC, remodel, ADU | Alhambra · Los Angeles County | — | — |
| 4D Construction | Ramirez Carmelo | — | (310) 908 5625 | GC, remodel, ADU | Azusa · Los Angeles County | — | — |
| 4G Builders INC | Juan Manuel Morales | — | (310) 995 8012 | GC, remodel, ADU | Lynwood · Los Angeles County | — | — |
| 4home Controls | 4home Controls | — | (626) 202 8011 | Other | Pomona · Los Angeles County | — | — |
| 4K Patios | 4K Patios | — | (818) 287 1536 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| 4M Plumbing | 4M Plumbing | — | (818) 399 9620 | Other | Sylmar · Los Angeles County | — | — |
| 4M Plumbing INC | Erick Estuardo Monterroso Mcclaughlin | — | (818) 399 9620 | Other | Sylmar · Los Angeles County | — | — |
| 4ourbath | Martin Gonzalez Vega | — | (323) 528 3598 | GC, remodel, ADU | Montebello · Los Angeles County | — | — |
| 4site Construction | Todd Ellis Wexman | — | (323) 905 6745 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 5 - Star Construction | Cesar Arturo Perdomo | — | (213) 591 1174 | GC, remodel, ADU | Lancaster · Los Angeles County | — | — |
| 5 - Star Interior Services INC | Ginger Chapin Chrupcala | — | (818) 845 4518 | Other | Paramount · Los Angeles County | — | — |
| 5 H Garage Doors INC | Mahmoud Mike Ghais | — | (310) 567 2123 | Other | Torrance · Los Angeles County | — | — |
| 5 Points Sash & Doors | Robert Fernando Acuna | — | (310) 326 4141 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| 5 Star Best Plumbing | Raymond Earl Jackson | — | (855) 999 4417 | HVAC | Newhall · Los Angeles County | — | — |
| 5 Star Builders INC | Kayumba Kanama | — | (818) 687 3113 | Electricians | West Hills · Los Angeles County | — | — |
| 5 Star Construction | Jose Alfredo Sr Rosales | — | (213) 273 4454 | GC, remodel, ADU | Gardena · Los Angeles County | — | — |
| 5 Star Construction INC | Munguia Jose | — | (214) 475 2664 | Other roofers | Woodland Hills · Los Angeles County | — | — |
| 5 Star Construction Pros | George Lanning | — | (310) 439 0316 | GC, remodel, ADU | Studio City · Los Angeles County | — | — |
| 5 Star Drywall Services | Hernandez Hugo Ruiz | — | (424) 394 7549 | Other | Inglewood · Los Angeles County | — | — |
| 5 Star Electric | Edwin Narciso Merino | — | (323) 377 8228 | Electricians | Los Angeles · Los Angeles County | — | — |
| 5 Star Heating & Cooling | 5 Star Heating & Cooling | — | (562) 618 3410 | HVAC | Paramount · Los Angeles County | — | — |
| 5 Star Perez Development INC | Walter Antonio Perez | — | (408) 594 0686 | GC, remodel, ADU | Pomona · Los Angeles County | — | — |
| 5 Star Tree Service INC | Erika Maria Castro | — | (818) 480 2130 | Other | Pomona · Los Angeles County | — | — |
| 5 Stars Garage Door And Gate INC | Amor Assaf | — | (888) 500 0575 | Other | North Hollywood · Los Angeles County | — | — |
| 5 Stars Plumbing | Drusha Levy | — | (310) 709 6156 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| 5 Stars Remodeling & Construction INC | Edgar Enrique Vasquez | — | (818) 614 1199 | GC, remodel, ADU | Reseda · Los Angeles County | — | — |
| 5 Zero INC | Vivian M Liu | — | (909) 598 5598 | GC, remodel, ADU | Diamond Bar · Los Angeles County | — | — |
| 501 Plumbing | 501 Plumbing | — | (323) 470 1917 | Other | Commerce · Los Angeles County | — | — |
| 501 Remodeling | 501 Remodeling | — | (323) 470 1937 | GC, remodel, ADU | Commerce · Los Angeles County | — | — |
| 502 Electric INC | Luis Miguel Lopez Castillo | — | (310) 936 4664 | Electricians | Compton · Los Angeles County | — | — |
| 502 Framing INC | Menfil Eliud Gonzales Santos | — | (818) 849 1654 | Other | Winnetka · Los Angeles County | — | — |
| 503 Zone Construction INC | Miguel Enrique Mendez Barrera | — | (323) 603 7976 | GC, remodel, ADU | Valley Glen · Los Angeles County | — | — |
| 506 Bw INC | Guillermo Esau Vallejuarez | — | (562) 760 2090 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 509 Builders INC | Brent Oliver Coert | — | (310) 702 5075 | GC, remodel, ADU | Santa Monica · Los Angeles County | — | — |
| 510 Plumbing And Rooter INC | Alan Chavarria | — | (510) 603 4829 | Other | Burbank · Los Angeles County | — | — |
| 562 Construction | Matthew Robert Merz | — | (562) 715 8526 | GC, remodel, ADU | Lakewood · Los Angeles County | — | — |
| 562 Painting Co | Alexander Joshua Carrillo | — | (562) 351 3616 | Windows, patio, painters | Whittier · Los Angeles County | — | — |