| K & H Electric Service | Keven Douglas Henderson | — | (805) 526 6259 | Electricians | Simi Valley · Ventura County | — | — |
| K & H Roofing Corporation | Holly Lynn Goesch | — | (805) 217 8940 | Other roofers | Simi Valley · Ventura County | — | — |
| K B Energy | K B Energy | — | (805) 836 5275 | Electricians | Oak View · Ventura County | — | — |
| K B S Plumbing | Freddy Adrian Peraza Chi | — | (805) 824 6139 | Other | Oxnard · Ventura County | — | — |
| K C B Engineering INC | Keith Christian Bellefontaine | — | (805) 526 4174 | Other | Simi Valley · Ventura County | — | — |
| K C Easterling Cabinets | K C Easterling Cabinets | — | (805) 216 6855 | Other | Ventura · Ventura County | — | — |
| K C H Electric | Hahn Casey | — | (805) 647 8817 | Electricians | Ventura · Ventura County | — | — |
| K C Parnell General Contractor | K C Parnell General Contractor | — | (818) 943 3167 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| K D Enterprise | K D Enterprise | — | (805) 512 6727 | Other | Oxnard · Ventura County | — | — |
| K E Baker | K E Baker | — | (805) 794 0178 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| K G Enterprises | Keith Alan Grim | — | (805) 312 4114 | Other | Camarillo · Ventura County | — | — |
| K H Electric | Kyle Edward Hunt | — | (805) 290 2574 | Electricians | Ventura · Ventura County | — | — |
| K M E Construction | Kerry Michael Enos | — | (805) 577 1382 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| K Mattern Construction INC | Kyle Timothy Mattern | — | (805) 469 8089 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| K O Landscapes INC | Kathy Lynn Oswald | kyle@kolandscapes.com | (805) 443 4606 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| K P Mulderrig Contracting | Kevin Patrick Mulderrig | — | (917) 375 4368 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| K R H Home Improvements | K R H Home Improvements | — | (805) 798 2058 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| K R Windows INC | Kenneth John Rose | — | (805) 755 3043 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| K S Concrete | K S Concrete | — | (805) 494 0096 | Other | Thousand Oaks · Ventura County | — | — |
| K&j Quality Roofing INC | Jose Luis Alarcon | — | (805) 443 9808 | Other roofers | Santa Paula · Ventura County | — | — |
| K&k Construction | Benzaquen Slocovich Katherine | — | (805) 328 9324 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| K&t Plumbing And Contracting | Kenyon Lamont Jr Tobin | — | (805) 302 2155 | Other | Ventura · Ventura County | — | — |
| Kachay Global Development INC | Samuel Karp | — | (619) 972 6177 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Kahler Construction Co | Brand Alexis Jr Kahler | — | (805) 798 3126 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Kaido - 1 Construction | Guarino Christopher | — | (805) 261 0542 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Kainalu Glass LLC DBA Kg Glass | Zachary Aikue Flores | — | (818) 648 7054 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Kaiser Air Conditioning And Sheet Metal INC | Kelli Damaris Kaiser | — | (805) 988 1800 | HVAC | Oxnard · Ventura County | — | — |
| Kalorama Landscape INC | Amy Lauren Aguilar | — | (805) 850 3936 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Kam Coastal Development INC | Keith Allan Mathias | — | (805) 376 1300 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Kamran Metalworks INC | Daniel Robert Rios | — | (800) 480 9418 | HVAC | Oxnard · Ventura County | — | — |
| Kane Electrical Solutions | Michael Edward Patri Kane | — | (805) 443 5178 | Electricians | Camarillo · Ventura County | — | — |
| Kar Concrete INC | Keith Allen Read | karconcrete@gmail.com | (805) 498 6292 | Other | Newbury Park · Ventura County | — | — |
| Karl Funk Construction INC | Karl Logan Funk | office@karlfunkconstruction.com | (805) 745 1000 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Kasey Davis Pools | Kasey Davis Pools | — | (805) 732 4259 | Pool | Thousand Oaks · Ventura County | — | — |
| Kashou Construction INC | Christopher Marwan Kashou | — | (818) 292 0521 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Katz Enterprises INC | Mark Brian Katz | — | (805) 390 2321 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Kavanagh Finish Carpentry | Kavanagh Finish Carpentry | — | (805) 405 6295 | Other | Newbury Park · Ventura County | — | — |
| Kayhan Roofing INC | Corey John Pate | — | (818) 292 0969 | Other roofers | Thousand Oaks · Ventura County | — | — |
| Kazimir Home Services | Nicklas Scott Kazimir | nick@kazimirhomeservices.com | (805) 300 4296 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Kb Sheet Metal LLC | Kevin James Stiles | kbsheetmetal1@gmail.com | (805) 267 6231 | Other | Thousand Oaks · Ventura County | — | — |