| Lumination Design Signs | Miriam Veronica Gutierrez | — | (408) 890 1961 | Other | San Jose · Santa Clara County | — | — |
| Lumisol INC | Leopoldo Zaragoza-Garcia | contact@lumisol.com | (650) 299 1152 | Electricians | Morgan Hill · Santa Clara County | — | — |
| Luna Bella Painting | Luna Bella Painting | — | (408) 966 4339 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Luna C Builders | Luna C Builders | — | (408) 649 8497 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Luna's Bay Area Custom Tile | Luna's Bay Area Custom Tile | — | (408) 202 9648 | Other | San Jose · Santa Clara County | — | — |
| Luna's Grading And Paving | Luna's Grading And Paving | — | (510) 861 4470 | Other | San Jose · Santa Clara County | — | — |
| Luna's Tree Services LLC | Villalba Alvaro Luna | — | (650) 222 8056 | Other | Palo Alto · Santa Clara County | — | — |
| Lunar Energy Services LLC | J Stephen Pollock | — | (650) 351 2060 | Electricians | Mountain View · Santa Clara County | — | — |
| Lund Pearson Mclaughlin | Shawn Aaron Gray | — | (650) 961 9460 | Other | Mountain View · Santa Clara County | — | — |
| Lundmark Construction INC | Nicholas Tobias Lundmark | lundmarkconst@aol.com | (408) 832 4500 | GC, remodel, ADU | Saratoga · Santa Clara County | — | — |
| Lunneborg Roofing INC DBA Western Roofing Systems | Michael Donn Lunneborg | — | (408) 402 1465 | Other roofers | Campbell · Santa Clara County | — | — |
| Luong Construction | Khang Phan Luong | — | (408) 691 9005 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Lupian Landscaping Co | Jose Antonio Lupian | — | (408) 504 0485 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Luque General Construction INC | Hector Amilcar Luque Vasquez | — | (669) 499 2128 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Luu Construction | Shane Van Luu | — | (408) 623 7558 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Luv2cln | Michael Allen Jones | — | (408) 842 1896 | Other | Gilroy · Santa Clara County | — | — |
| Lux Design Group DBA Lux Design Build Group | Mahesh Singh Wadhva | — | (650) 305 1103 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Lux Go Construction | Jeffrey Chi Nguyen | — | (408) 386 6348 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Lux One Painting INC | Steven Robins Shaw | — | (408) 702 0088 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Lux Painting | Lux Painting | — | (408) 661 3763 | Windows, patio, painters | Morgan Hill · Santa Clara County | — | — |
| Luxe Av | Garrett Stephen Barnes | — | (408) 626 9641 | Other | San Jose · Santa Clara County | — | — |
| Luxe Landscape Inc. | Richard Nelson Ramos | — | (408) 710 9120 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Luxura Builders INC | Robert Steven Greene | — | (408) 677 0700 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Luxury Home Remodeling INC | Shlomi Hayun | billing@luxuryhomeremodeling.com | (408) 889-8115 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Luxury Kitchens INC | Adrienne Suzanne Paolini-Mc Grath | — | (408) 313 5800 | GC, remodel, ADU | Los Gatos · Santa Clara County | — | — |
| Luxury Living Construction Co | Mahatma Gandhi Ramirez Rodriguez | — | (408) 903 6387 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Luz Maria Arriaga Rodriguez | Luz Maria Arriaga Rodriguez | — | (408) 706 8915 | Windows, patio, painters | Morgan Hill · Santa Clara County | — | — |
| Lv Windows & Doors | Lv Windows & Doors | — | (626) 444-4126 | Windows, patio, painters | South El Monte · Santa Clara County | — | — |
| Lyncon Construction INC | Mike Charles Bergstrom | — | (408) 768 2266 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Lynell Johnson Construction | Lynell Sebastian Johnson | — | (650) 255 2735 | GC, remodel, ADU | Mountain View · Santa Clara County | — | — |
| Lynstar Enterprises INC | Jack Iii Cannon | — | (408) 280 1848 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Lyon Electric | George Douglas Lyon | — | (925) 325 7621 | Electricians | San Jose · Santa Clara County | — | — |
| Lyons Brothers Plumbing | John Patrick Lyons | — | (408) 297 8893 | Other | San Jose · Santa Clara County | — | — |
| Lyons General Engineering INC | Lyons William | — | (408) 923 7223 | Other | San Jose · Santa Clara County | — | — |
| Lyte Construction LLC | Mohammed Wajahat Sheikh | — | (408) 329 3095 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Lz Plumbing Services | Luis Alfredo Zuniga Bravo | lzplumbingservices@gmail.com | (408) 427-7804 | Other | Gilroy · Santa Clara County | — | — |
| M & B Iron Works | Burdit Bartley Phillips | mbiron2018@gmail.com | (408) 824 3637 | Electricians | San Jose · Santa Clara County | — | — |
| M & G Hauling INC | Jose Luis Magana | — | (669) 205 7010 | Other | San Martin · Santa Clara County | — | — |
| M & J Custom Construction INC | Gina Marie Pimentel | — | (408) 219 1176 | GC, remodel, ADU | San Martin · Santa Clara County | — | — |
| M & J Stone Restoration Company | Marco Antonio Saucedo Soto | — | (408) 724 0800 | Restoration | San Jose · Santa Clara County | — | — |