| Kelly Construction Services | Cory Graham Kelly | — | (831) 245 7494 | Other | Gustine · Merced County | — | — |
| Ken E Tunnell Painting | Ken E Tunnell Painting | — | (209) 658 2327 | Windows, patio, painters | Merced · Merced County | — | — |
| Ken Farmer Home Improvement INC | Kenneth Lee Farmer | hollsheetmetal@gmail.com | (209) 720 7463 | GC, remodel, ADU | Merced · Merced County | — | — |
| Ken Ouse | Ken Ouse | — | (209) 485 2070 | Other | Snelling · Merced County | — | — |
| Kenneth Johns | Kenneth Johns | — | (209) 262 0854 | Other | Hilmar · Merced County | — | — |
| Kevin Gibson Painting | Kevin Gibson Painting | — | (209) 761 3188 | Windows, patio, painters | Merced · Merced County | — | — |
| Kevin Hernandez Painting | Kevin Hernandez Painting | — | (209) 777 6446 | Windows, patio, painters | Merced · Merced County | — | — |
| Kna Contracting | Ashlee Ann Albrecht | — | (209) 756 8008 | GC, remodel, ADU | Merced · Merced County | — | — |
| Koehn Electric INC | Koehn Jonathan | — | (209) 564 1038 | Electricians | Winton · Merced County | — | — |
| Kumar's Finish Carpentry | Kumar's Finish Carpentry | — | (209) 652 4199 | Other | Santa Nella · Merced County | — | — |
| Kw Construction INC | Kevin James Wibert | alecia@kwconstruction.com | (209) 617 7031 | GC, remodel, ADU | Merced · Merced County | — | — |
| Kwik Kerb INC | Ryan Lee Loewen | — | (209) 535 6103 | Windows, patio, painters | Livingston · Merced County | — | — |
| L C Heating & Air Conditioning | Leopoldo Iv Castro | — | (831) 789 1354 | HVAC | Los Banos · Merced County | — | — |
| L J S Construction HVAC Sheetmetal | Leonard John Sanchez | — | (209) 769 0727 | HVAC | Merced · Merced County | — | — |
| L S Landscaping | L S Landscaping | — | (209) 675 0870 | Windows, patio, painters | Los Banos · Merced County | — | — |
| La Concrete Nation Corp | Sanchez Leonardo Alvarado | — | (209) 675 5944 | Other | Dos Palos · Merced County | — | — |
| La Guardia Security | La Guardia Security | — | (209) 381-0569 | Alarm and generators | Merced · Merced County | — | — |
| Lane Takers INC | Fernando Guzman-Rodriguez | — | (209) 600 5493 | Other | Merced · Merced County | — | — |
| Langarica Plastering INC | Garcia Saul Langarica | — | (408) 385 5727 | Other | Los Banos · Merced County | — | — |
| Langley's Custom Painting | Langley's Custom Painting | — | (209) 769 5371 | Windows, patio, painters | Dos Palos · Merced County | — | — |
| Lantern And Shield Property Inspections Inc. | Lantern And Shield Property Inspections Inc. | mcampos@lanternshield.com | (209) 316-1678 | Inspectors | Merced · Merced County | — | — |
| Larry Lopez Drywall & Taping | Larry Lopez Drywall & Taping | — | (408) 813 4521 | GC, remodel, ADU | Santa Nella · Merced County | — | — |
| Lartech | Joseph L Larson | — | (408) 591 3369 | Other | Los Banos · Merced County | — | — |
| Laser Precision Land Leveling INC | Mario Alexander Belerique | — | (209) 664 9000 | Other | Hilmar · Merced County | — | — |
| Latinos Fire Protection | Latinos Fire Protection | — | (510) 606 3743 | Other | Merced · Merced County | — | — |
| Lawler Excavation Pipeline And Utilities INC | Tom Edward Lawler | — | (209) 384 7147 | Other | Merced · Merced County | — | — |
| Lawrence Backhoe Service INC | Arthur Joseph Lawrence | — | (209) 358 2544 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Ld Painting LLC | Luis Alberto Diaz Martinez | — | (408) 630 5228 | Windows, patio, painters | Santa Nella · Merced County | — | — |
| Ledger Framing INC | Salvador Ortega-Barajas | — | (209) 769 0783 | Other | Merced · Merced County | — | — |
| Left Coast Drywall INC | Luis Armando Guzman | — | (831) 717 7245 | Other | Los Banos · Merced County | — | — |
| Leo Construction | Rivera Molina Leonardo | — | (209) 230 8971 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Leo Ramirez Roofing INC | Jose Leonor Ramirez | — | (209) 388 9536 | Other roofers | Merced · Merced County | — | — |
| Leopoblo Lopez | Leopoblo Lopez | — | (209) 704 4519 | HVAC | Dos Palos · Merced County | — | — |
| Les Warkentin Construction | Leslie Eldon Warkentin | — | (209) 658 4886 | GC, remodel, ADU | Atwater · Merced County | — | — |
| Let There Be Light Electrical Solutions INC | Bryan Edward Wright | — | (209) 308 3118 | Electricians | Merced · Merced County | — | — |
| Lg Plumbing Services | Garcia Luis | — | (559) 514 9701 | Other | Merced · Merced County | — | — |
| Lippert Electric | Lance Andrew Lippert | — | (209) 712 7503 | Electricians | Los Banos · Merced County | — | — |
| Living Water Well Drilling | Living Water Well Drilling | — | (209) 617 0945 | Other | Merced · Merced County | — | — |
| Living Water Well Drilling | Michael Andrew Ii Torell | — | (209) 355 5640 | GC, remodel, ADU | Merced · Merced County | — | — |
| Lj Drywall INC | Juan Luis Jimenez Rosales | — | (408) 761 8122 | Windows, patio, painters | Gustine · Merced County | — | — |