| Levi Landscape Corporation | Aaron Michael Goltry | info@levilandscape.com | (951) 779 8000 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Levi's Landscaping INC | Scott Douglas Ross | — | (951) 316 5253 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Lewis Construction | Larry Michael Sofer | — | (239) 600 0303 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Lewis Construction | John William Lewis | — | (951) 566 7188 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Ley Heating & Air Conditioning INC | Travis William Mercer | — | (909) 654 1871 | HVAC | San Jacinto · Riverside County | — | — |
| Leyva Landscaping Services | Felipe Jesus Leyva De La Riva | — | (949) 355 7753 | Windows, patio, painters | Norco · Riverside County | — | — |
| Lezama's Custom Painting | Ricardo Lezama | — | (760) 835 3175 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Lfc Construction PC | Shawn David Savage | — | (951) 490 5223 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Lfr Fire LLC | Dalton Riley Hanna | — | (562) 239 9898 | Other | Corona · Riverside County | — | — |
| Lg Flooring Solutions LLC | Luis Fernando Garcia | — | (562) 261 6906 | Other | Corona · Riverside County | — | — |
| Lg Home Improvement | Garcia Everardo Lopez | larryghomeimprovements@gmail.com | (951) 251 9670 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Lg Paint Works INC | Gabriel Allen Ewing | lgpaintworksinc@gmail.com | (760) 910 1971 | Windows, patio, painters | Indio · Riverside County | — | — |
| Lg Sheet Metal | Lg Sheet Metal | — | (213) 842 8845 | Other | Riverside · Riverside County | — | — |
| Lga Contracting INC | Hector Hernandez Luevano | — | (951) 285 6545 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Lga Custom Drywall | Lga Custom Drywall | eben@eyebytes.com | (951) 551 8250 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Lhh Communications | Lhh Communications | — | (951) 941 7505 | Other | Moreno Valley · Riverside County | — | — |
| Liangping Lin | Liangping Lin | — | (626) 223 4552 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Liberty F R P | Liberty F R P | — | (951) 789 5716 | Other | Riverside · Riverside County | — | — |
| Liberty General Contractors INC | Michael Weldon Hart | — | (714) 412 5883 | Electricians | Norco · Riverside County | — | — |
| Liberty Landscaping INC | Casillas Alejandro | — | (951) 683 2999 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Liberty Mens Restoration Services | Robert Corey Lortz | — | (951) 642 0650 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Liberty Plumbing Heating & Air Conditioning INC | Gerald Delmer Howes | — | (951) 760 4215 | HVAC | Murrieta · Riverside County | — | — |
| Libolt Design & Remodel INC | Willis Allan Libolt | — | (909) 376 8434 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Licausi Construction INC | Licausi Dan | dave@lab6.com | (503) 314 1520 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Lietz Construction Company INC | Jacob Lee Lietz | — | (951) 491 1803 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Life Saver Safety Systems | Alin Claudiu Arsenov | — | (951) 521 2888 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Life Stone | Life Stone | — | (949) 292 2190 | Other | Temecula · Riverside County | — | — |
| Lifeguard Electric INC | Krzysztof Kamil Christa | — | (949) 205 6232 | Electricians | Winchester · Riverside County | — | — |
| Lifescape Builders INC | Maegan Alyse Harlow | — | (951) 466 9019 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Lifetime Blinds | Lifetime Blinds | — | (760) 778 6978 | Other | Palm Springs · Riverside County | — | — |
| Lifetime Patios | Lifetime Patios | — | (442) 327 6520 | Other | Indio · Riverside County | — | — |
| Lifetime Plumbing | Lifetime Plumbing | — | (951) 438 5194 | Other | Hemet · Riverside County | — | — |
| Lifetime Vinyl Fence Fabricators INC | Donald Eugene Jr Garling | — | (951) 735 3500 | Other | Riverside · Riverside County | — | — |
| Light Energy INC | Mathew Gary William Dunbar | — | (951) 941 1058 | Other roofers | Riverside · Riverside County | — | — |
| Light House Construction Services | Carlos Humberto Jr Morales | — | (951) 733 0998 | Other | Corona · Riverside County | — | — |
| Light House Heating & Cooling INC | Christopher Paul Alvis | — | (951) 464 6692 | HVAC | Canyon Lake · Riverside County | — | — |
| Light House The | Caroline Florence Halcovich | — | (760) 770 8331 | Electricians | La Quinta · Riverside County | — | — |
| Light Of The World Electric INC | Raul Lucas Mendez | — | (951) 505 0280 | Electricians | San Jacinto · Riverside County | — | — |
| Lightfeldt Construction INC | William Ernest Lightfeldt | — | (951) 241 4067 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| Lightfoots Plastering | Lightfoots Plastering | — | (310) 892 2659 | Other | Riverside · Riverside County | — | — |