| K Dickinson Enterprises INC DBA Superior Concrete Construction | Kelly Gene Dickinson | — | (951) 359 1222 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| K E C Engineering | Charles Edgar Ii Hickman | — | (951) 734 3010 | Other | Corona · Riverside County | — | — |
| K F G Construction | Kenneth Forrest Graybill | — | (805) 889 7981 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| K G Construction | Kenneth Richard Schmale | kyle@kgconstruction.com | (760) 275 4920 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| K Hinkle Painting INC | Kyle Keith Hinkle | office@khinklepainting.com | (760) 360 2424 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| K J Painting | K J Painting | — | (951) 265 4430 | Windows, patio, painters | Menifee · Riverside County | — | — |
| K L Painting Co | Ho Keun Lee | info@klpainting.com | (714) 356 7373 | Windows, patio, painters | Riverside · Riverside County | — | — |
| K M E Maintenance | K M E Maintenance | — | (949) 533 0163 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| K M Masonry | K M Masonry | — | (909) 969 5268 | Other | Perris · Riverside County | — | — |
| K N N Electric | Kiet Huynh Nguyen | — | (714) 234 4804 | Electricians | Eastvale · Riverside County | — | — |
| K O Electric | Joseph Paul O'connor | — | (951) 818 8961 | Electricians | Sun City · Riverside County | — | — |
| K O J Electric | Jacob Luis Urrutia | — | (951) 207 5423 | Electricians | Riverside · Riverside County | — | — |
| K P Hudson Construction INC | Benjamin Drew Hudson | — | (760) 275 6137 | GC, remodel, ADU | Indio · Riverside County | — | — |
| K P Painting | K P Painting | — | (951) 688 4014 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| K P Pool INC | Timothy John Thompson | — | (909) 794 2022 | Pool | Indio · Riverside County | — | — |
| K P S Alarms INC DBA K P S Power Home | Wesley Kirk Page | — | (909) 980 9222 | Electricians | Riverside · Riverside County | — | — |
| K P S Fire Sprinklers INC | Wesley Kirk Page | — | (909) 980 9222 | Other | Riverside · Riverside County | — | — |
| K Pinson Stairs INC | John Kelley Pinson | — | (451) 795 5139 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| K R K Construction | Kenny Ray Keebaugh | — | (909) 725 5538 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| K Rainey Construction | Kyle Matthew Rainey | kraineyconstruction@yahoo.com | (951) 205 2363 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| K S Electric | Kevin Kyle Smith | — | (951) 531 7814 | Electricians | Homeland · Riverside County | — | — |
| K S M Electric INC | Kevin Patrick Mac Donald | — | (909) 795 8886 | Electricians | Calimesa · Riverside County | — | — |
| K W Builders INC | Kirk Leroy Welsh | — | (951) 903 0354 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| K Webb Construction | Kevin Michael Webb | — | (530) 828 4557 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| K Z Masonry | K Z Masonry | — | (949) 463 6681 | Other | Wildomar · Riverside County | — | — |
| K&j Plastering INC | Mirna Bernadet Koro | — | (951) 522 8666 | Other | Riverside · Riverside County | — | — |
| K&m Tile & Marbel INC | Colin Nancy Arias | — | (951) 490 7122 | Other | Perris · Riverside County | — | — |
| K&r Granite Countertops | Cabrera Roy | — | (951) 345 5416 | Other | Perris · Riverside County | — | — |
| K-1 Home Improvements LLC | Fernando Gonzalez | — | (619) 408 9360 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| K-rod Concrete | K-rod Concrete | — | (760) 877 3625 | Other | Menifee · Riverside County | — | — |
| K2c Holdings INC | Peter John Brady | — | (951) 301 8975 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Kabos General Construction INC | Antonio Ledesma-Lopez | — | (951) 250 4187 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Kairos Construction | Troy Ronald Schlereth | joe.southon@kairos-construction.com | (951) 434 9534 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Kairos Quality Construction | Gabriela Lucia Rodriguez | — | (714) 215 7861 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Kaizan Construction | Richard Michael Zanini | — | (760) 578 8306 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Kaizen Builders INC | Luis Antonio Vega | — | (714) 858 9660 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Kali Plumbing INC | Salas Khenyhir Dominguez | — | (951) 423 1892 | Other | San Jacinto · Riverside County | — | — |
| Kallen Contracting INC | Gerald Evan Allen | %20admin@kallencontracting.com | (951) 768 7445 | Electricians | Temecula · Riverside County | — | — |
| Kamrik Lighting Incorporated | Ricky Dean Boettcher | — | (909) 262 8019 | Electricians | Riverside · Riverside County | — | — |
| Kana Development Group INC | Daniel Alan Locke | — | (714) 986 1400 | Other | Riverside · Riverside County | — | — |