| Loa's Manufactured Home Services Of California | Raul Ernest Loa | — | (209) 947 8888 | Other | Atwater · Merced County | — | — |
| Lorenzo G Rodriguez | Lorenzo G Rodriguez | — | (408) 417 2082 | Other | Los Banos · Merced County | — | — |
| Los Banos Garage Door Co | Darin Mc Kay Baerwaldt | john@yahoo.com | (209) 829 1703 | Other | Los Banos · Merced County | — | — |
| Los Banos Roofing INC | Solorio Juan Jose Rodriguez | losbanosroofing@gmail.com | (209) 704 7681 | Other roofers | Los Banos · Merced County | — | — |
| Los Lobos Roofing | Alejandro De La Torre Rios | — | (209) 451 6855 | Other roofers | Merced · Merced County | — | — |
| Louis Lopez | Louis Lopez | — | (408) 396 3275 | Windows, patio, painters | Los Banos · Merced County | — | — |
| Lourenco's Electrical Heating A / C Diagnostics | Michael Frank Lourenco | — | (209) 357 5684 | HVAC | Atwater · Merced County | — | — |
| Low Price Auto Glass | Low Price Auto Glass | — | (209) 386-0600 | Windows, patio, painters | Merced · Merced County | — | — |
| Lua's Manufactured Homes Services | Garcia Rigoberto Lua | — | (209) 230 8178 | Other | Atwater · Merced County | — | — |
| Lucas Sanchez Painting | Lucas Sanchez Painting | — | (209) 205 6800 | Windows, patio, painters | Merced · Merced County | — | — |
| Lucky Plumbing & Rooter LLC | Yuri Alexander Sagastume | — | (831) 313 6379 | Other | Los Banos · Merced County | — | — |
| Ludwig Construction | Brian Jon Jr Ludwig | — | (209) 777 5667 | GC, remodel, ADU | Merced · Merced County | — | — |
| Luis Cunha Painting | Luis Cunha Painting | — | (209) 769 9011 | Windows, patio, painters | Merced · Merced County | — | — |
| Luis Vasquez Quality Drywall | Luis Vasquez Quality Drywall | — | (209) 777 1194 | Other | Atwater · Merced County | — | — |
| Luke Bingle's Masonry | Luke Bingle's Masonry | — | (209) 872 9186 | Other | Livingston · Merced County | — | — |
| Luke Hoover Painting | Luke Hoover Painting | — | (209) 723-8336 | Windows, patio, painters | Merced · Merced County | — | — |
| Luminous Electric INC | Luis Enrique Gil Poron | — | (408) 981 6884 | Electricians | Atwater · Merced County | — | — |
| Luna's Roofing | Luna Ojeda Gilberto | — | (209) 720 9974 | Other roofers | Merced · Merced County | — | — |
| Luxore Construction Company | Oscar Edwin Mejia Coyoc | — | (408) 509 3554 | GC, remodel, ADU | Winton · Merced County | — | — |
| Lv Custom Construction | Enrique Ledesma Pineda | — | (408) 367 9288 | GC, remodel, ADU | Los Banos · Merced County | — | — |
| Lynn Douglas Design & Construction | Warren Douglas Murdock | — | (209) 617 8310 | GC, remodel, ADU | Merced · Merced County | — | — |
| Lyte Electric Company | Jimmy Jaramillo Gonzalez | — | (209) 617 9779 | Electricians | Merced · Merced County | — | — |
| M & M Construction | Manuel Jr Mancebo | — | (209) 678 0409 | GC, remodel, ADU | Livingston · Merced County | — | — |
| M & M Piping And Cooling Systems INC | Mitchell Bryan Self | — | (209) 417 9578 | HVAC | Ballico · Merced County | — | — |
| M A Construction | Manuel Adelino Avila | info@maconstruction.com | (209) 704 0398 | GC, remodel, ADU | Los Banos · Merced County | — | — |
| M B Electric | Matthew Casey Bales | info@mbelectric.com | (209) 230 0820 | Electricians | Merced · Merced County | — | — |
| M C M Plumbing | M C M Plumbing | — | (209) 261 2740 | Other | Merced · Merced County | — | — |
| M D N Tile INC | Michael Dominic Nalawagan | — | (209) 704 2736 | Other | Los Banos · Merced County | — | — |
| M V Construction INC | Manuel De Jesus Valdez | — | (209) 756 5936 | Other | Atwater · Merced County | — | — |
| M-mig Construction INC | Matthew Mark Migliazzo | — | (209) 724 9488 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Machado Backhoe INC | Daniel Lee Machado | — | (209) 634 4836 | Other | Stevinson · Merced County | — | — |
| Maciel & Sons Finish Carpentry INC | Gonzalez Francisco Maciel | — | (209) 417 4581 | Other | Livingston · Merced County | — | — |
| Maldonado Painting | Maldonado Painting | maldonadochaypainting@yahoo.com | (209) 485 2053 | Windows, patio, painters | Livingston · Merced County | — | — |
| Manny's General Construction | Jose Manuel Ortiz | — | (209) 675 2793 | GC, remodel, ADU | Dos Palos · Merced County | — | — |
| Manuel A Oliveira | Manuel A Oliveira | — | (209) 765 7246 | GC, remodel, ADU | Hilmar · Merced County | — | — |
| Marco's Construction - Landscaping & Concrete | Marco Antonio Rodriguez | — | (209) 769 6620 | GC, remodel, ADU | Merced · Merced County | — | — |
| Mark Green Backhoe Service | Mark Melvin Green | — | (209) 277 6275 | Other | Stevinson · Merced County | — | — |
| Mark Jantz Electric | Mark Wendell Jantz | — | (209) 564 1040 | Electricians | Winton · Merced County | — | — |
| Marks Masonry Construction | Mark Anthony Owens | — | (650) 369 0411 | Other | Atwater · Merced County | — | — |
| Marlin Neese Construction | Marlin Henry Neese | — | (209) 620 3224 | GC, remodel, ADU | Hilmar · Merced County | — | — |