| Kustom Paving | Brian Anthony Stevens | — | (916) 752 4257 | Other | West Sacramento · Yolo County | — | — |
| Kvilhaug Drilling & Pump INC | Eric Daniel Kvilhaug | — | (707) 372 8588 | Other | Winters · Yolo County | — | — |
| Kw Construction | Kristin Marie Kelleher-Wong | alecia@kwconstruction.com | (916) 372 8600 | HVAC | West Sacramento · Yolo County | — | — |
| L D C Construction Co | Lonnie David Jr Cooper | — | (530) 908 2604 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| L G S Drilling INC | Merwin Scott Smith | — | (530) 681 2012 | Other | Winters · Yolo County | — | — |
| L N L Painting | L N L Painting | — | (408) 797 6789 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| L Reyes Construction INC | Luis Jr Reyes | — | (530) 400 5817 | GC, remodel, ADU | Davis · Yolo County | — | — |
| L S & J Electric INC | Jeffrey Thomas Hulse | — | (530) 304 6474 | Electricians | Woodland · Yolo County | — | — |
| L&l Roofing INC | Luis Jr Reyes | — | (530) 400 5817 | Other roofers | Davis · Yolo County | — | — |
| Lamar A - 1 Septic Service INC | Melinda Iva Lamar | — | (916) 371 4160 | Other | West Sacramento · Yolo County | — | — |
| Lamoree Construction | Jayson Cory Lamoree | — | (530) 304 9225 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Landmark Painting | Landmark Painting | — | (530) 908 2850 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Larry Guenther Construction | Larry Dean Guenther | — | (530) 219 6881 | GC, remodel, ADU | Davis · Yolo County | — | — |
| Lcb Design Construction LLC | Lawrence Clayton Beck | impallari@gmail.com | (707) 761 2709 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Lcm Construction Services INC | Joe Orlando Matthews | — | (209) 918 1485 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Lee Electrical | Brian Christopher Ly | — | (732) 832 9619 | Electricians | West Sacramento · Yolo County | — | — |
| Lee Engineering | Lee Engineering | — | (916) 618 7500 | Other | West Sacramento · Yolo County | — | — |
| Lemus Painting | Lemus Painting | — | (530) 383 3857 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Lermaxx Builders INC | Cervantes Ricardo Morales | %20info@lermaxxbuilders.com | (530) 980 1996 | GC, remodel, ADU | Esparto · Yolo County | — | — |
| Lewis Pipelines | Lewis Pipelines | — | (916) 997 6774 | Other | West Sacramento · Yolo County | — | — |
| Licea Electric | Licea Alvarez Gustavo | — | (530) 650 9729 | Electricians | Woodland · Yolo County | — | — |
| Lifeline Rooter | Andrade Pedro Pantoja | — | (530) 702 8084 | Other | Woodland · Yolo County | — | — |
| Lightning Demolition And Hauling | Lightning Demolition And Hauling | — | (530) 753 3220 | Other | Davis · Yolo County | — | — |
| Lion Heart Construction Corp | Juan Manuel Jr Tejeda | — | (707) 980 5139 | HVAC | Winters · Yolo County | — | — |
| Lion Restoration INC | Alexa L Malik | — | (916) 501 6679 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Livingreen Landscape | Livingreen Landscape | — | (916) 217 9362 | Windows, patio, painters | West Sacramento · Yolo County | — | — |
| Lobello Flooring | Lobello Flooring | — | (530) 383 1188 | Other | Davis · Yolo County | — | — |
| Logan Vaughn | Logan Vaughn | — | (530) 519 5462 | Other | Woodland · Yolo County | — | — |
| London Carpentry | London Carpentry | — | (510) 393 3751 | GC, remodel, ADU | Knights Landing · Yolo County | — | — |
| Lone Oak Construction | Jose Ignacio Molina | — | (530) 405 6877 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Lorelis Painting | Lorelis Painting | lorelispainting@gmail.com | (530) 650 9018 | Windows, patio, painters | Woodland · Yolo County | — | — |
| Loyola Landscape Construction | Jorge Carlos Loyola | — | (530) 747 0630 | Windows, patio, painters | Davis · Yolo County | — | — |
| Lucas Roofing | Gerald Ray Lucas | — | (530) 304 3665 | Other roofers | Davis · Yolo County | — | — |
| M & M Concrete Creations INC | Martinez Emmanuel Gonzalez | — | (530) 554 8546 | Other | Davis · Yolo County | — | — |
| M & M Structures INC | Michael Gary Moore | — | (707) 975 3073 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| M A Management & Frank Construction INC | Anthony Meredith Frank | — | (916) 602 7867 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| M B Construction | Matthew William Balogh | — | (530) 723 8315 | GC, remodel, ADU | Winters · Yolo County | — | — |
| M C C Millwork | M C C Millwork | — | (916) 230 3864 | Other | Woodland · Yolo County | — | — |
| M C M Construction INC | Tabitha Christine Mcgahey | — | (916) 334 1221 | Other | West Sacramento · Yolo County | — | — |
| M C Tile Installation | M C Tile Installation | — | (650) 773 4957 | Other | West Sacramento · Yolo County | — | — |