| Lake Wood Hardwood Floors | Lake Wood Hardwood Floors | — | (951) 227 1786 | Other | Norco · Riverside County | — | — |
| Lakeshore Glass And Metal INC | Steve Walter Brehm | — | (951) 688 7272 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Lakeside Electric | Henry Damian Ramos | — | (951) 657 5014 | Electricians | Canyon Lake · Riverside County | — | — |
| Lakeside General Contractors | Tony Leonard Gomez | — | (951) 697 8877 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Lakeside Painting & Refinishing INC | Francisco Xavier Medina | — | (951) 484 8933 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Lakeview Construction INC | Timothy Douglass O'donnell | — | (951) 259 1096 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| Lakeview Pools | Juan Carlos Salas Flores | — | (951) 483 1778 | Pool | Nuevo · Riverside County | — | — |
| Lakevine | Jerry Chieh Lee | — | (949) 705 8814 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Lakewood Alarm | Gene Michael Smith | — | (951) 549 8200 | Electricians | Norco · Riverside County | — | — |
| Lalo Villegas Jr | Lalo Villegas Jr | — | (909) 816 2322 | Other | Moreno Valley · Riverside County | — | — |
| Lam & Son Construction | Solyza Van Lam | — | (586) 909 0535 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Lamas Construction Co | Miguel Angel Lamas | lamaspaving@gmail.com | (951) 906 3143 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Lamb Energy INC | Beverly Anne Bailey | — | (951) 684 9303 | Electricians | Riverside · Riverside County | — | — |
| Lambert And Son LLC DBA Circular A C | Craig Edward Lambert | — | (951) 445 0979 | HVAC | Wildomar · Riverside County | — | — |
| Lambert Builders INC | Kenneth Robert Lambert | — | (760) 409 4986 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Lambert Floorcovering INC | Charles Allen Lambert | — | (951) 734 2388 | Other | Corona · Riverside County | — | — |
| Lambert Roofing | Brian Joseph Lambert | — | (808) 281 5783 | Other roofers | Norco · Riverside County | — | — |
| Lamp Of Faith Electric | Eric Ryan Hoxsie | lampoffaith@aol.com | (310) 597 1051 | Electricians | Murrieta · Riverside County | — | — |
| Lamwood Seating Products INC | Stephen Chaney Rodriguez | — | (909) 622 1615 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Lancaster Roofing | Theresa Lynn Lancaster | — | (951) 685 6113 | Other roofers | Riverside · Riverside County | — | — |
| Lance Martin INC DBA Cobalt Property Maintenance | Lance Eric Martin | — | (951) 601 1170 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Lance Michael Jones | Lance Michael Jones | — | (760) 485 6559 | Other | Palm Desert · Riverside County | — | — |
| Lancelot's Plumbing Service | Lance Anthony Braun | — | (844) 526 2356 | Other | Eastvale · Riverside County | — | — |
| Land Concepts Incorporated | Gabriel Bautista Lua | — | (760) 324 7700 | Windows, patio, painters | Indio · Riverside County | — | — |
| Land Savvy | Land Savvy | — | (760) 534 1178 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Land Ventures Landscaping | Land Ventures Landscaping | — | (760) 766 6591 | Windows, patio, painters | Indio · Riverside County | — | — |
| Landa's Air | Landa's Air | — | (909) 954 6074 | HVAC | Moreno Valley · Riverside County | — | — |
| Landers Plumbing | Landers Plumbing | — | (626) 255 5315 | Other | Cathedral City · Riverside County | — | — |
| Landmark Doors | Landmark Doors | — | (951) 544 1889 | Other | Menifee · Riverside County | — | — |
| Landmark Gardens | Landmark Gardens | — | (951) 940 5780 | Windows, patio, painters | Gavilan Hills · Riverside County | — | — |
| Landmark Golf Pgm Landscaping | Richard Wayne Gigoux | — | (760) 776 6688 | Windows, patio, painters | Indian Wells · Riverside County | — | — |
| Landscape By Design | Francisco Figueroa | landscapebydesign@hotmail.com | (760) 660 2722 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Landscape Pro Services | Michael Leslie Jones | — | (909) 268 3896 | Windows, patio, painters | Eastvale · Riverside County | — | — |
| Landscape Specialties Installation And Maintenance INC | Robert Kevin Jr Lasher | — | (714) 351 0812 | Windows, patio, painters | Corona · Riverside County | — | — |
| Landscape Unique Irrigation Services | Jose Luis Rodriguez Esquivel | — | (951) 818 6540 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Landscaping By Mike | Landscaping By Mike | — | (909) 519 5212 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Landscaping Unlimited INC | Roberto Gutierrez De La Torre | — | (951) 277 6885 | Windows, patio, painters | Perris · Riverside County | — | — |
| Landscapx | Trinidad Martin | info@landscapx.com | (951) 903 7274 | Windows, patio, painters | Corona · Riverside County | — | — |
| Landvision Landscape Construction LLC | Kevin Isaac Moscoso | — | (951) 581 1115 | Windows, patio, painters | Wildomar · Riverside County | — | — |
| Lane-aire Manufacturing Corporation | Donald Fred Harms | — | (951) 808 3658 | Other | Corona · Riverside County | — | — |