| Lapham Windows INC | Blair Tecumseh Manwell | — | (209) 522 9775 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Lar Construction INC | Ramandeep Singh | — | (209) 605 6500 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Lara Enterprise | Lara Enterprise | — | (209) 345 7982 | Other | Ceres · Stanislaus County | — | — |
| Lara Flooring | Lara Flooring | — | (209) 409 9110 | Other | Modesto · Stanislaus County | — | — |
| Lara's Concrete Solutions LLC | Carlos Jr Lara | info@larasconcretesolutions.com | (209) 758 5438 | Other | Modesto · Stanislaus County | — | — |
| Lara-soto Plumbing | Lara-soto Plumbing | — | (209) 800 9652 | Other | Ceres · Stanislaus County | — | — |
| Larry Corona Construction INC | Mark Rowland Boddy | — | (209) 522 8715 | Electricians | Salida · Stanislaus County | — | — |
| Larry Dehart | Larry Dehart | — | (209) 495 7777 | Other roofers | Turlock · Stanislaus County | — | — |
| Larry Joe Combs Jr | Larry Joe Combs Jr | — | (209) 765 8234 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Larry Silvestri INC DBA Heritage Doors & Glass | Jeannette Eden Silvestri | — | (209) 815 9999 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Larson Construction INC | Albert Arnold Larson | — | (209) 815 1136 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Layman Electric INC | Eric Thomas Layman | info@laymanelectric.com | (209) 522 2244 | Electricians | Modesto · Stanislaus County | — | — |
| Layman Technology Solutions INC | Eric Thomas Layman | — | (209) 522 2244 | Electricians | Modesto · Stanislaus County | — | — |
| Layton Roofing | Mark Thomas Layton | — | (209) 847 2435 | Other roofers | Oakdale · Stanislaus County | — | — |
| Lea's Demolition | Lea's Demolition | — | (209) 620 8095 | Other | Ceres · Stanislaus County | — | — |
| Leaf Green INC | Francisco Javier Juarez | info@leafgreen.com | (209) 985 4503 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| Leam Backhoe And Underground INC DBA Leam Backhoe And Underground | Roger Jay Leam | — | (209) 883 2721 | Other | Hughson · Stanislaus County | — | — |
| Lear Drywall | Lear Drywall | — | (209) 735 2169 | Other | Newman · Stanislaus County | — | — |
| Legacy Cabinet Painting | Legacy Cabinet Painting | joecarrr@hotmail.com | (408) 898 0097 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Legacy Insulation INC | Peter Humberto Gonzalez | contact@legacy-insulation.com | (925) 660 7580 | Other | Salida · Stanislaus County | — | — |
| Legend Roofing Company INC | Mercado Marcos Huerta | legendroofingcompanyinc@gmail.com | (669) 294 1760 | Other roofers | Modesto · Stanislaus County | — | — |
| Lei-sure Painting | Lei-sure Painting | — | (209) 648 3212 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Leland A White | Leland A White | — | (209) 605 3578 | Other | Ceres · Stanislaus County | — | — |
| Lemke Homes INC | Eric Martin Lemke | — | (209) 322 3661 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Lemmons And Sloan Painting | Curtis Nelson Lemmons | — | (209) 404 9988 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Lemos Corporation | Derek David Lemos | — | (209) 581 4541 | GC, remodel, ADU | Waterford · Stanislaus County | — | — |
| Leo Christopher Botto | Leo Christopher Botto | — | (209) 404 2480 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Leo's Construction | Garcia Cervantes Leonel | — | (650) 464 5810 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Leo's Painting | Leo's Painting | — | (209) 312 8623 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Leon Construction | Martin Jeronimo Solis | — | (408) 209 1272 | Electricians | Crows Landing · Stanislaus County | — | — |
| Leon Tree Services INC | Eliseo Morales | — | (630) 487-6690 | Tree | Turlock · Stanislaus County | — | — |
| Leonard Lovalvo Construction | Lovalvo Leonard | — | (209) 505 9888 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Leonard Montey Jr | Leonard Montey Jr | — | (209) 202 9018 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Lepard Contracting Services INC | Jamie George Lepard | — | (209) 484 7641 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Leslie E Onsager Design And Construction | Leslie Elizabeth Onsager | — | (209) 602 3062 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Lester W Grover General Contractor INC | Christen Alyssa Grover | — | (209) 613 6566 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Lev Construction And Design | Gary Lev | — | (209) 345 3575 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Level 10 Concrete INC | Carlos Delgado | — | (209) 303 4008 | Other | Ceres · Stanislaus County | — | — |
| Level 21 Construction INC | Victor Rafael Gutierrez-lopez | — | (408) 781 3436 | Electricians | Patterson · Stanislaus County | — | — |
| Level Land Builders INC | Joseph Ralph Rodriguez | — | (209) 844 9998 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |