| 1320 Plumbing INC | Henry B Penate | — | (818) 401 7997 | Other | Pacoima · Los Angeles County | — | — |
| 1345 Construction | Jose Angel Arrieta | — | (213) 926 7429 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 168 Construction And Remodeling | Eric Zhao | — | (626) 284 6682 | GC, remodel, ADU | Alhambra · Los Angeles County | — | — |
| 168adu Construction | Pu Johnny | — | (626) 949 0403 | GC, remodel, ADU | City Of Industry · Los Angeles County | — | — |
| 17 Paradigm INC | Edgar Ayala | — | (562) 983 8811 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| 1776 Built INC | Robert Michael Troiano | — | (747) 488 1776 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| 18 Remodel INC | Stephen Francis Killilea | — | (818) 744 9251 | GC, remodel, ADU | Reseda · Los Angeles County | — | — |
| 18 Remodeling Group INC | Peer Roee | — | (818) 339 7573 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| 180 Construction Group INC | Michael Imani | — | (310) 497 2180 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| 1800 Construction INC | Golan Yigael Cohen | — | (310) 220 1954 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 182 Construction | Aldous Gatmaitan Simpao | — | (818) 237 7489 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 19346 Painting | 19346 Painting | — | (714) 331 8790 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| 1977 Construction INC | Jose Gutierrez-Arriaga | — | (818) 900 5278 | Other roofers | Studio City · Los Angeles County | — | — |
| 1980 Co LLC | Patrick Paygar Jr Boyd | — | (818) 489 6403 | Electricians | Monrovia · Los Angeles County | — | — |
| 1st Call Building Solutions | 1st Call Building Solutions | — | (323) 901 4832 | GC, remodel, ADU | Palmdale · Los Angeles County | — | — |
| 1st Call Refrigeration INC | Todd Anthony Garcia | — | (714) 951 6383 | HVAC | Whittier · Los Angeles County | — | — |
| 1st Century Builders INC | Colin Tuan Pratt | — | (818) 254 7183 | GC, remodel, ADU | Agoura Hills · Los Angeles County | — | — |
| 1st Choice Builders INC | Sonia Mardirossian | — | (818) 433 4971 | GC, remodel, ADU | Van Nuys · Los Angeles County | — | — |
| 1st Choice Construction & Restoration INC | Onik Stepani Hakopian | — | (818) 370 1590 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| 1st Choice General Services INC | Sebastian Jr Rodriguez | — | (818) 602 1501 | GC, remodel, ADU | North Hills · Los Angeles County | — | — |
| 1st Choice Handyman | 1st Choice Handyman | — | (720) 252 6240 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| 1st City Electrical Contractors | Robert William Griffin | — | (213) 595 1564 | Electricians | Compton · Los Angeles County | — | — |
| 1st Class Builder | 1st Class Builder | — | (626) 826 2319 | GC, remodel, ADU | La Puente · Los Angeles County | — | — |
| 1st Class Fire Safety Compliance | Timothy John Roach | — | (818) 631 8756 | Other | North Hills · Los Angeles County | — | — |
| 1st Class Fireplace & Chimney Inspections INC | Johnny Ray Jr Lankford | — | (661) 310 5131 | Other | Santa Clarita · Los Angeles County | — | — |
| 1st Gen Floorer | 1st Gen Floorer | — | (323) 667 4219 | Other | Los Angeles · Los Angeles County | — | — |
| 1st Home Construction Corp | Ziquan Zhang | — | (626) 620 9751 | GC, remodel, ADU | City Of Industry · Los Angeles County | — | — |
| 1st Innovative Constructions INC | Keneraki Albert Davidian | — | (818) 497 2344 | GC, remodel, ADU | La Canada · Los Angeles County | — | — |
| 1st Prime Design Contractors INC | Nejad Hossein Kermani | — | (310) 930 3505 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| 1st Rise | Robert S Shamsi | — | (310) 600 3363 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 1st Sign INC | Allen Yu | — | (626) 336 1616 | Other | La Puente · Los Angeles County | — | — |
| 1st Step Flooring | Sanchez Fernando Nolasco | — | (818) 917 0647 | Other | Pacoima · Los Angeles County | — | — |
| 1st Tech Restoration INC | Juana Asuncion Carpio | — | (310) 328 6065 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| 2 - Big Crew Construction | Ryan Aaron Howell | — | (323) 251 2615 | GC, remodel, ADU | Pasadena · Los Angeles County | — | — |
| 2 - K Electric INC | Sang Chul Ko | — | (213) 663 4151 | Electricians | Los Angeles · Los Angeles County | — | — |
| 2 2 2 Builders | 2 2 2 Builders | — | (310) 995 7082 | GC, remodel, ADU | Carson · Los Angeles County | — | — |
| 2 As Property Management & Remodel Corp | Anthony John Pascual | — | (909) 706 8892 | GC, remodel, ADU | Claremont · Los Angeles County | — | — |
| 2 Brothers Custom Cabinets Corp | Marco Antonio Duran Andrade | — | (323) 412 6265 | Other | Los Angeles · Los Angeles County | — | — |
| 2 De Durango INC | Mario Angel Garcia | — | (909) 518 0094 | GC, remodel, ADU | Pomona · Los Angeles County | — | — |
| 2 Elements Heating & A/c | 2 Elements Heating & A/c | — | (562) 412 3238 | HVAC | Hacienda Heights · Los Angeles County | — | — |