| Louis Perron Construction | Louis Allen Perron | — | (916) 765 1608 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Loveland Roofing INC | Steven Michael Loveland | — | (916) 761 7455 | Other roofers | Newcastle · Placer County | — | — |
| Loverde Builders INC | Richard William Loverde | info@sdbxstudio.com | (530) 581 5533 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Lovgren & Associates | Burton Keith Lovgren | — | (916) 765 0907 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Lovoltec Low Voltage Technologies INC | Scott William Fritz | — | (916) 512 6158 | Other | Loomis · Placer County | — | — |
| Lowsada | Nikolay Cherenkov | impallari@gmail.com | (916) 890 7076 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Lrc Electrical | Zachary John Lella | — | (530) 217 8925 | Electricians | Auburn · Placer County | — | — |
| Luca Built | Luca Built | mike@lucabuilt.com | (530) 412 2181 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Ludlow Construction And Design | Matthew Jesse Jennin Ludlow | — | (916) 343 0095 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Lugo Energy INC | Yurii Lugovyi | — | (916) 514 2072 | Electricians | Roseville · Placer County | — | — |
| Luke Ragan Construction | Luke Thomas Ragan | — | (530) 583 3447 | Other | Tahoe City · Placer County | — | — |
| Lumi Construction INC | Liem Van Huynh | — | (916) 432 9446 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Lumina Electric | Emanoil Liviu Lazureanu | — | (916) 715 8495 | Electricians | Rocklin · Placer County | — | — |
| Luminist Homes INC | Jason Michael Mckissick | — | (916) 621 2003 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Lunscon | Rory Colin Lunsford | — | (530) 277 0649 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Lupine Landscaping LLC | Jeremy Ryan Osburn | — | (530) 536 6129 | Windows, patio, painters | Kings Beach · Placer County | — | — |
| Lupo Contracting | Anthony Martin Lupo | — | (916) 761 7946 | GC, remodel, ADU | Alta · Placer County | — | — |
| Lutsik Construction And Design | Anatoliy Semenovich Lutsik | — | (916) 633 3422 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Lux Pools | Sergey Kisel | — | (916) 205 3530 | Electricians | Rocklin · Placer County | — | — |
| Luxe Level | Aleksandr Zagainov | — | (386) 506 7810 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Luxera INC | Richard Lee Igou | — | (916) 764 5338 | Electricians | Rocklin · Placer County | — | — |
| Luxury Tile & Mosaic INC | Vladimir Chornyy | — | (916) 952 5564 | Other | Roseville · Placer County | — | — |
| Lv Quality Construction INC | Vladimir Victorovich Litovchenko | — | (916) 230 8320 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Lw Contracting INC | William Eugene Wells | — | (510) 517 3630 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Lyle H Lawler | Lyle H Lawler | — | (925) 383 3188 | Other | Lincoln · Placer County | — | — |
| Lyons Tree Service | Michael Arthur Lyons | — | (916) 521 9040 | Tree | Auburn · Placer County | — | — |
| M & L O'donnell | Matthew James O'donnell | — | (707) 332 8915 | Electricians | Colfax · Placer County | — | — |
| M 2 Builders | Michael Trevor Nielsen | hr@mbuilders.com | (916) 257 1222 | GC, remodel, ADU | Loomis · Placer County | — | — |
| M 2 M Construction INC | Nicholas William Euge Morton | — | (916) 712 4004 | GC, remodel, ADU | Roseville · Placer County | — | — |
| M 5 Electric | Robert Charles Matthews | shea@m-electric.com | (530) 308 5341 | Electricians | Auburn · Placer County | — | — |
| M A Mathis Painting Contractor | M A Mathis Painting Contractor | — | (916) 539 2528 | Windows, patio, painters | Newcastle · Placer County | — | — |
| M A Mone Excavating & Construction | Michael Anthony Mone | — | (530) 913 7724 | GC, remodel, ADU | Weimar · Placer County | — | — |
| M A Smith Painting INC | Mark Aaron Smith | manager@masmithpainting.com | (916) 740 3913 | Windows, patio, painters | Roseville · Placer County | — | — |
| M Alba Iron Works INC | Jerry Roger Lee | — | (916) 532 6498 | Other | Roseville · Placer County | — | — |
| M B C Engineering | M B C Engineering | — | (916) 408 2762 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| M B J Concrete Construction | Kenneth Jon Leege | — | (916) 622 7202 | Other | Lincoln · Placer County | — | — |
| M B M Electric | Gerard Brandon Henriksen | — | (916) 868 3100 | Electricians | Lincoln · Placer County | — | — |
| M C F Construction | Mark Chesnut Foster | — | (650) 888 4206 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| M C Wane Construction | Mark Christopher Wane | — | (916) 397 0734 | GC, remodel, ADU | Roseville · Placer County | — | — |
| M D Construction | Matthew Leroy Davis | — | (707) 365 3108 | GC, remodel, ADU | Rocklin · Placer County | — | — |