| Leo Tidwell Excavating Corporation | Leo Walter Jr Tidwell | — | (805) 238 4612 | Other | Paso Robles · San Luis Obispo County | — | — |
| Leo Tidwell Iii Excavating | Leo Tidwell Iii Excavating | — | (805) 238 4612 | Other | Paso Robles · San Luis Obispo County | — | — |
| Leo Ventura Plastering | Leo Ventura Plastering | — | (805) 610 3126 | Other | Paso Robles · San Luis Obispo County | — | — |
| Leo Walter Tidwell Jr | Leo Walter Tidwell Jr | — | (805) 238 4612 | Other | Paso Robles · San Luis Obispo County | — | — |
| Leo's Landscaping Services | Rivera Leonardo | — | (805) 434 7650 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Leon Smith Tile & Stone | Leon Smith Tile & Stone | — | (805) 431 0563 | Other | Grover Beach · San Luis Obispo County | — | — |
| Lerno's Construction INC | Nicholas Emery Lerno | — | (805) 369 2074 | Electricians | Templeton · San Luis Obispo County | — | — |
| Leroy Richards' Pirate Plastering | Leroy Richards' Pirate Plastering | — | (805) 801 2791 | Other | Morro Bay · San Luis Obispo County | — | — |
| Les Oshiro Floor Covering INC | Joyce S Oshiro-Mcpherson | — | (805) 440 0265 | Other | Paso Robles · San Luis Obispo County | — | — |
| Leseman Plumbing | Leseman Plumbing | — | (805) 441 4633 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Lessi Construction INC | Steven Frederick Lessi | — | (805) 441 2591 | GC, remodel, ADU | Cayucos · San Luis Obispo County | — | — |
| Lester's Handyman Service | Malcolm Lester Iii Shea | — | (805) 709 0787 | GC, remodel, ADU | Grover Beach · San Luis Obispo County | — | — |
| Leticias First Class Cleaning INC | Leticia Gomez | — | (805) 610 2542 | Other | Paso Robles · San Luis Obispo County | — | — |
| Level Edge Construction | Jeffrey Scott Boomsma | — | (805) 801 5596 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Level Up Rain Gutters | Level Up Rain Gutters | levelupraingutters@gmail.com | (805) 423 2336 | Other | Paso Robles · San Luis Obispo County | — | — |
| Lewis Built Construction | Robert Steven Lewis | — | (805) 765 0772 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Lge | Cory Dean Lewis | — | (805) 610 3820 | Other | Templeton · San Luis Obispo County | — | — |
| Liberty Environmental Services | Christopher Gardner Fasse | — | (805) 440 3446 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Lifetime Builder | Lifetime Builder | — | (805) 709 0825 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Lifetime Seamless Rain Gutters | Lifetime Seamless Rain Gutters | — | (805) 714 3131 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Lighthouse Electrical Services INC | Richard Jay Iii Howard | — | (805) 540 4926 | Electricians | Templeton · San Luis Obispo County | — | — |
| Lighthouse Keepers INC | Guy Michael Gonzales | — | (805) 296 6214 | Other | Grover Beach · San Luis Obispo County | — | — |
| Lighting Technologies | Lighting Technologies | — | (805) 431 3158 | Electricians | Pismo Beach · San Luis Obispo County | — | — |
| Limb INC | Michelle Lynn Brown | — | (805) 674 2786 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Lindemans Construction | Jeffrey Merle Lindemans | lindemanstrucking@charter.net | (805) 461 6997 | Other | Atascadero · San Luis Obispo County | — | — |
| Lindsey Harn Group - Christie's International Real Estate Sereno | Lindsey Harn Group - Christie's International Real Estate Sereno | — | (805) 441-7744 | Property managers | San Luis Obispo · San Luis Obispo County | — | — |
| Lion Landscaping | Pozotempa Martin Nava | — | (951) 410 2361 | Windows, patio, painters | Oceano · San Luis Obispo County | — | — |
| Lion Pro Flooring | Lion Pro Flooring | — | (805) 712 3710 | Other | Paso Robles · San Luis Obispo County | — | — |
| Lion's Landscaping LLC | Ruiz-pantaleon Luis | — | (805) 712 9630 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Lionhart Residential Remodeling | Ramiro Jr De Leon | — | (805) 602 6521 | HVAC | Arroyo Grande · San Luis Obispo County | — | — |
| Litchfield Landscape | Curtis Lee Litchfield | curtis@litchfieldlandscape.com | (805) 723 5003 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| Litten Drywall Systems | Litten Drywall Systems | — | (805) 952 5500 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Little Big Town Plumbing | Little Big Town Plumbing | — | (805) 423 7048 | Other | San Miguel · San Luis Obispo County | — | — |
| Little John Construction | John Henry Little | john.ljc@gmail.com | (805) 234 2374 | GC, remodel, ADU | Los Osos · San Luis Obispo County | — | — |
| Liv Treu Homes INC | Christopher Joseph Schachtell | — | (323) 314 9544 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Live Oak Electric INC | Ryan Michael Taylor | — | (805) 540 0321 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Lj Construction Co | Lindsey Marie James | — | (805) 801 5776 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Lloyd's Plumbing | Lloyd's Plumbing | — | (805) 610 5109 | Other | Paso Robles · San Luis Obispo County | — | — |
| Lobos Construction | Victor Manuel Hernandez | — | (805) 434 8467 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Local Kolor Painting | Local Kolor Painting | — | (805) 540 9001 | Windows, patio, painters | Morro Bay · San Luis Obispo County | — | — |