| Langdon Electric | Charles Allen Langdon | — | (909) 374 0230 | Electricians | Corona · Riverside County | — | — |
| Langdon Floor Covering | Nicolas Marco Langdon | — | (951) 588 3882 | Other | Murrieta · Riverside County | — | — |
| Langley Painting | Langley Painting | — | (951) 808 9512 | Windows, patio, painters | Norco · Riverside County | — | — |
| Langley Painting INC | Michael Dove Langley | — | (714) 808 9512 | Windows, patio, painters | Norco · Riverside County | — | — |
| Lanik Enterprises INC | Carly Loren Rozzo | management@lanikenterprises.com | (951) 676 7114 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Lanik Pumping Service | James Paul Lanik | — | (951) 763 5650 | Other | Temecula · Riverside County | — | — |
| Lantana Landscape Group INC | Edgar Abel Vazquez Gonzalez | — | (714) 618 3177 | Windows, patio, painters | Norco · Riverside County | — | — |
| Lapointe Plumbing | Lapointe Plumbing | — | (951) 805 7908 | Other | Wildomar · Riverside County | — | — |
| Lara Pools And Spas | Lara Pools And Spas | — | (909) 957 5229 | Electricians | San Jacinto · Riverside County | — | — |
| Larco Development INC | Pablo Larez | — | (951) 201 5126 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Larel Block Quality Plumbing Corporation | Mark Benjamin Weaver | — | (951) 845 2014 | Other | Beaumont · Riverside County | — | — |
| Laren C Miller | Laren C Miller | — | (909) 322 3158 | Other | Riverside · Riverside County | — | — |
| Lares Drywall | Lares Drywall | — | (760) 863 5798 | Other | Indio · Riverside County | — | — |
| Lares Floor Covering INC | Lares Salvador | — | (714) 791 2137 | Other | Riverside · Riverside County | — | — |
| Larragoitiy Connection | Larragoitiy Connection | — | (951) 840 7297 | Electricians | Riverside · Riverside County | — | — |
| Larry Allen | Larry Allen | — | (760) 333 1101 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Larry Coia Jr DBA 7 C's Construction & Maintanence | Larry Andrew Jr Coia | — | (760) 831 5212 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Larry Dean Viseur | Larry Dean Viseur | — | (909) 923 6979 | Other | Norco · Riverside County | — | — |
| Larry Donald Masonry | Larry Donald Masonry | — | (951) 858 7684 | Other | Winchester · Riverside County | — | — |
| Larry Hochanadel Construction INC | Larry Robert Hochanadel | — | (760) 320 5118 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Larry Keast Painting | Larry Keast Painting | — | (760) 521 1829 | Windows, patio, painters | Temecula · Riverside County | — | — |
| Larry M Aandahl | Larry M Aandahl | — | (909) 973 4076 | HVAC | Jurupa Valley · Riverside County | — | — |
| Larry Netschke | Larry Netschke | — | (951) 455 1225 | HVAC | Murrieta · Riverside County | — | — |
| Larry Ogilvie | Larry Ogilvie | — | (951) 840 7462 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Larry The HVAC Guy | Larry The HVAC Guy | — | (714) 463 5248 | HVAC | Riverside · Riverside County | — | — |
| Larry's Concrete Pumping INC | Larry Alan Tucker | — | (951) 737 6439 | Other | Corona · Riverside County | — | — |
| Larry's Electric | Larry Perales Perez | — | (626) 893 9878 | Electricians | Riverside · Riverside County | — | — |
| Larry's Quality Painting | Larry's Quality Painting | — | (951) 852 2340 | Windows, patio, painters | Wildomar · Riverside County | — | — |
| Lartek Restoration INC DBA Lartek Construction | Christian Lara | — | (951) 840 8686 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Las Cuevas Construction | Cuevas Francisco | — | (951) 333 1255 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Las Lomas Construction And Restoration | Chavez Gonzalo Echevarria | — | (951) 965 4426 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Las Palmas Painting | Las Palmas Painting | — | (760) 333 4959 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Lasalle Electric INC | Jonatan Ramirez | — | (760) 404 0379 | Electricians | Thousand Palms · Riverside County | — | — |
| Last Call Backhoe LLC | Walter Leroy Willette | — | (951) 455 1407 | Other | Wildomar · Riverside County | — | — |
| Last Generation Coatings | Rojas Roberto Cid | — | (909) 208 0644 | Other | Riverside · Riverside County | — | — |
| Lathrop Builders INC | Kyle Thomas Lathrop | team@latofonts.com | (760) 340 0044 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Lathrop Development & Construction INC | Thomas Vincent Lathrop | — | (760) 340 0044 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Laurence-hovenier INC | Belinda Leah Hovenier | — | (951) 736 2990 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Laursen Electrical Contractors INC | Dana Lee Laursen | — | (951) 751 7240 | Electricians | Murrieta · Riverside County | — | — |
| Lav Construction | Luis Antonio Vega | — | (951) 294 3150 | GC, remodel, ADU | Winchester · Riverside County | — | — |