| Lori Electric | Lorilaine Jean Serrano | — | (831) 521 2841 | Electricians | Seaside · Monterey County | — | — |
| Los Ositos Tree Care | Los Ositos Tree Care | — | (831) 601 9868 | Other | Marina · Monterey County | — | — |
| Louis A Dimonaco Company | Louis Anthony Di Monaco | — | (831) 238 7421 | Electricians | Carmel · Monterey County | — | — |
| Louis Ptak Construction INC | Louis Dylan Ptak | — | (831) 372 8025 | GC, remodel, ADU | Pacific Grove · Monterey County | — | — |
| Lualemana Electric | Tony Simeti Lualemana | — | (831) 521 7334 | Electricians | Marina · Monterey County | — | — |
| Lucarelli Construction | Richard Joseph Lucarelli | mlucarelli@lucarelliconstruction.com | (831) 331 0134 | GC, remodel, ADU | Pacific Grove · Monterey County | — | — |
| Lucerna Electric INC | Ivan Lenin Rodriguez Aguilar | — | (831) 225 5576 | Electricians | Salinas · Monterey County | — | — |
| Lucido Construction | Vincent Andrew Lucido | — | (831) 402 7709 | GC, remodel, ADU | Seaside · Monterey County | — | — |
| Luengas Lath & Plaster | Luengas Lath & Plaster | — | (831) 595 5778 | Other | Salinas · Monterey County | — | — |
| Lugo's Plastering INC | Rubio Efrain Lugo | monterey@lugosplastering.com | (831) 920 9642 | Other | Carmel · Monterey County | — | — |
| Luis Landscaping | Luis Landscaping | — | (831) 236 4919 | Windows, patio, painters | Seaside · Monterey County | — | — |
| Luis Lugo Plastering INC | Rubio Efrain Lugo | — | (831) 241 8433 | Other | Seaside · Monterey County | — | — |
| Luminex Electric INC | Jovani Gaona | — | (831) 596 1013 | Electricians | Salinas · Monterey County | — | — |
| Luna HVAC | Vicente Luna | — | (831) 392 7545 | HVAC | Marina · Monterey County | — | — |
| Luquin Tile & Stone INC | Juan Manuel Luquin | — | (831) 262 5218 | Other | Salinas · Monterey County | — | — |
| Luster Landscape Management | Luster Landscape Management | — | (831) 596 7609 | Windows, patio, painters | Carmel · Monterey County | — | — |
| Luxury Cabinets & Finish | Luxury Cabinets & Finish | — | (831) 277 1331 | Other | Seaside · Monterey County | — | — |
| Luxury Custom Painting INC | Omar Benito Juarez Lucas | — | (831) 884 8876 | Windows, patio, painters | Carmel Valley · Monterey County | — | — |
| Lyle Gillogly | Lyle Gillogly | — | (831) 663 5357 | GC, remodel, ADU | Salinas · Monterey County | — | — |
| Lyondesign | Stephen Thomas Lyon | — | (831) 601 4718 | GC, remodel, ADU | Carmel · Monterey County | — | — |
| M & M Construction | Michael John Thomas Mac Donald | — | (831) 320 2420 | GC, remodel, ADU | Aromas · Monterey County | — | — |
| M & M Lopez Painting And Remodeling INC | Lopez Martin Lopez | — | (831) 229 4681 | GC, remodel, ADU | Salinas · Monterey County | — | — |
| M Avila Painting | M Avila Painting | — | (831) 682 2418 | Windows, patio, painters | Salinas · Monterey County | — | — |
| M B Landscape | M B Landscape | — | (831) 254 7289 | Windows, patio, painters | Royal Oaks · Monterey County | — | — |
| M Bruno Electric INC | Michael Anthony Bruno | — | (831) 277 1796 | Electricians | Monterey · Monterey County | — | — |
| M C F Construction LLC | Michael Charles Frederick | — | (831) 620 9876 | GC, remodel, ADU | Carmel · Monterey County | — | — |
| M C Landscapes | M C Landscapes | — | (831) 582 7718 | Windows, patio, painters | Salinas · Monterey County | — | — |
| M C Tile | M C Tile | — | (831) 277 3264 | Other | Monterey · Monterey County | — | — |
| M D R Flooring | M D R Flooring | — | (831) 578 3514 | GC, remodel, ADU | Salinas · Monterey County | — | — |
| M G Painting | M G Painting | — | (831) 206 9915 | Windows, patio, painters | Salinas · Monterey County | — | — |
| M H Plastering | M H Plastering | — | (831) 229 4413 | Other | Salinas · Monterey County | — | — |
| M J Newell Landscaping & Maintenance INC | Shannon Martin Dickson | — | (650) 208 5760 | Windows, patio, painters | Lockwood · Monterey County | — | — |
| M Johnson Construction INC | Michael James Johnson | — | (805) 471 8119 | Other | Bradley · Monterey County | — | — |
| M M C | M M C | — | (831) 521 3512 | GC, remodel, ADU | Monterey · Monterey County | — | — |
| M N Construction | Miguel Angel Nunez | — | (831) 262 3810 | GC, remodel, ADU | Salinas · Monterey County | — | — |
| M P Construction & Electrical | Mario Edward Pennisi | — | (831) 594 9492 | Electricians | Monterey · Monterey County | — | — |
| M P N Refrigeration | M P N Refrigeration | matt@mpnrefrigeration.com | (831) 320 3325 | HVAC | Salinas · Monterey County | — | — |
| M P S Construction INC | Mauricio Perez-Santos | — | (831) 521 9454 | GC, remodel, ADU | Seaside · Monterey County | — | — |
| M Painting | M Painting | — | (831) 333 6223 | Windows, patio, painters | Marina · Monterey County | — | — |
| M R Olson G C | M R Olson G C | — | (831) 659 4775 | GC, remodel, ADU | Carmel Valley · Monterey County | — | — |