| Khb Construction INC | Ryan Earl Kelly | — | (209) 620 0068 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| King Fence Co | Rick Lee King | — | (209) 656 0493 | Other | Turlock · Stanislaus County | — | — |
| King Landscaping INC | Kenneth Edward King | — | (209) 632 6134 | Windows, patio, painters | Hughson · Stanislaus County | — | — |
| King Of Trades Construction INC | Kunal Kishore Singh | — | (209) 531 8513 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| King's Roofing | David Dee King | — | (209) 892 3386 | Other roofers | Patterson · Stanislaus County | — | — |
| Kingdom-construction | Jesse Henry Jr De Leon | — | (510) 691 4969 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Kings Quality Painters INC | Reyes Cristobal Barajas | — | (209) 496 8140 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| Kinzie Construction INC | Delbert Ray Kinzie | — | (209) 402 3398 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Kirk Larson Construction | Kirk William Larson | — | (209) 668 2636 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Kirkes Electric INC | Larry Zane Nathanson | — | (209) 634 9301 | Electricians | Turlock · Stanislaus County | — | — |
| Kitchell Construction INC | Michael Clayton Kitchell | — | (209) 605 5472 | Other | Turlock · Stanislaus County | — | — |
| Kitchencrate And Bathcrate | Deren Michael Scott Monday | — | (888) 995 7996 | GC, remodel, ADU | Salida · Stanislaus County | — | — |
| Kiwi Woodworks | Kiwi Woodworks | — | (209) 607 5494 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Kline Son & Stinchfield INC | Lori Lou Kline | — | (209) 577 3296 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Klyn's Heating & Cooling | Klyn's Heating & Cooling | — | (209) 535 8874 | HVAC | Turlock · Stanislaus County | — | — |
| Knj Electric INC | Jocsan Magdiel Juarez Castaneda | — | (415) 418 9326 | Electricians | Turlock · Stanislaus County | — | — |
| Kody Construction | Dakota James Cole Smith | — | (559) 718 3263 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Kopp Construction | Kurt Frederick Kopp | — | (209) 402 8095 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Kordazakis Construction Company | John Michael Kordazakis | — | (209) 495 9504 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Kory Lee Gilbert | Kory Lee Gilbert | — | (209) 324 1194 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Krediet Construction Company INC A California Coprporation | John Kenneth Krediet | — | (209) 527 4340 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Kris Allen Gilbert | Kris Allen Gilbert | — | (209) 380 6824 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Kristopher M Viscovich | Kristopher M Viscovich | — | (925) 324 6436 | Pool | Modesto · Stanislaus County | — | — |
| Krueger Fence | Krueger Fence | — | (209) 988 6212 | Other | Modesto · Stanislaus County | — | — |
| Kuykendall Electric INC | AC Jr Kuykendall | — | (209) 735 8344 | Electricians | Modesto · Stanislaus County | — | — |
| Kyle Dean Electric LLC | Kyle Jonathan Ard Dean | kyledeanelectric@gmail.com | (650) 207 8889 | Electricians | Oakdale · Stanislaus County | — | — |
| L & S Roofing | Lee John Jr Facey | — | (209) 538 8820 | Other roofers | Ceres · Stanislaus County | — | — |
| L A P Lath & Plastering | Luis Fernando Barajas Aguilar | — | (209) 324 5236 | Other | Oakdale · Stanislaus County | — | — |
| L B Floors | L B Floors | — | (408) 592 9168 | Other | Patterson · Stanislaus County | — | — |
| L D Construction | Ke Lin | info@ldconstruction.com | (510) 241 8638 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| L2 Construction | Zachary Anthony Thrasher | — | (209) 736 5337 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| L3 Plumbing | L3 Plumbing | — | (209) 678 4397 | Other | Turlock · Stanislaus County | — | — |
| La Rosa Landscaping | La Rosa Landscaping | — | (209) 968 6149 | Windows, patio, painters | Hughson · Stanislaus County | — | — |
| La Villa Finish Carpentry | La Villa Finish Carpentry | — | (209) 864 9277 | Other | Modesto · Stanislaus County | — | — |
| Labor Of Love Construction | Alcala Jimmy | — | (209) 303 9119 | GC, remodel, ADU | Waterford · Stanislaus County | — | — |
| Lake Painting Company INC | Marvin George Lake | — | (209) 250 2054 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Lancaster Painting | Steve Michael Talkington | sales@lancasterpainting.com | (209) 370-0888 | Windows, patio, painters | Denair · Stanislaus County | — | — |
| Landon's Landscaping | Landon's Landscaping | — | (209) 648 7116 | Windows, patio, painters | Denair · Stanislaus County | — | — |
| Lane Austyn Company | Geoffrey Scott Powers | — | (209) 410 3637 | GC, remodel, ADU | Hughson · Stanislaus County | — | — |
| Lanz Drywall INC | Victor Luis Lanza | — | (408) 390 6187 | Other | Newman · Stanislaus County | — | — |