| Junk Patrol LLC | Spencer Farman | — | (916) 770 0443 | Other | Loomis · Placer County | — | — |
| Just In Case Irrigation | Just In Case Irrigation | — | (916) 410 0038 | Windows, patio, painters | Roseville · Placer County | — | — |
| Just Some Guy Painting INC | Brian Thomas Allen | — | (530) 412 2575 | Windows, patio, painters | Tahoe City · Placer County | — | — |
| Justice Heating And Air | Patrick Michael Azevedo-Norris | — | (916) 236 8467 | HVAC | Rocklin · Placer County | — | — |
| Justin's Doors And Construction INC | Justin Randel Pell | — | (925) 300 7097 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| Jv Concrete | Jv Concrete | — | (650) 834 0803 | Other | Auburn · Placer County | — | — |
| Jw Environmental LLC | James Monroe Weber | — | (916) 540 8595 | Other | Rocklin · Placer County | — | — |
| Jw Fencing | Abigail Jeanne Becker | — | (916) 699 9393 | Other | Roseville · Placer County | — | — |
| Jwr Construction | Jacob Watson Rodrigues | — | (650) 703 5825 | GC, remodel, ADU | Roseville · Placer County | — | — |
| K & B Electric Incorporated | Kurtis Lyle Holdren | — | (916) 652 6524 | Electricians | Loomis · Placer County | — | — |
| K & D Asphalt INC | Katherine Donna Davis | — | (818) 620 0565 | Other | Roseville · Placer County | — | — |
| K & G Concrete INC | Herman Joseph Keave Guillory | — | (916) 774 0287 | Other | Roseville · Placer County | — | — |
| K & J Company | Jeffrey Alan Garcia | — | (530) 906 1822 | Other | Weimar · Placer County | — | — |
| K A Maguire Arboricultural Services | Kevin Allen Maguire | — | (530) 863 9565 | Tree | Auburn · Placer County | — | — |
| K C Brandon Construction | Kent Douglas Brandon | — | (916) 296 8593 | GC, remodel, ADU | Newcastle · Placer County | — | — |
| K C Construction Company | Colette Eve Cook | — | (916) 879 0596 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| K C Contracting INC | Jay Patrick Kirkhouse | — | (916) 947 7937 | Windows, patio, painters | Rocklin · Placer County | — | — |
| K C L Builders | Donald David Ii Blair | — | (530) 407 0980 | GC, remodel, ADU | Meadow Vista · Placer County | — | — |
| K D C Construction | Malissa Marie Cenatiempo | — | (916) 367 2587 | GC, remodel, ADU | Auburn · Placer County | — | — |
| K G Plumbing | K G Plumbing | — | (916) 412 4626 | Other | Roseville · Placer County | — | — |
| K G Thompson Construction | Kenneth Gottheiner Thompson | — | (530) 514 3343 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| K J Carpeting | K J Carpeting | — | (916) 847 4698 | Other | Roseville · Placer County | — | — |
| K L M Construction | Kirk Lee Mc Elroy | — | (916) 770 6257 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| K M L Painting | K M L Painting | — | (530) 401 4003 | Windows, patio, painters | Homewood · Placer County | — | — |
| K M S Construction | Kent Michael Stevenson | — | (916) 813 3732 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| K P Martin INC | Shawn Marie Martin | — | (530) 320 8511 | Other | Auburn · Placer County | — | — |
| K R Build | K R Build | — | (408) 838 8343 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| K S Construction | Strange Kevin | — | (530) 583 8826 | GC, remodel, ADU | Olympic Valley · Placer County | — | — |
| K S J Electrical Construction INC | Kyle Stephen Jones | — | (530) 308 0747 | Electricians | Loomis · Placer County | — | — |
| K S Masonry INC | Kevin Manson Smith | — | (831) 601 9913 | Other | Rocklin · Placer County | — | — |
| K S Telecom INC | Suzan Diana Vander Linden | — | (916) 652 4735 | Electricians | Penryn · Placer County | — | — |
| K S Tile | K S Tile | — | (916) 747 7047 | Other | Roseville · Placer County | — | — |
| K S V Construction INC | Kvaterchuk Viktor | — | (916) 871 6445 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| K S Z Construction | Zachary Paul Stamas | — | (916) 258 5792 | GC, remodel, ADU | Roseville · Placer County | — | — |
| K Squared | Rusty Eugene Krouse | — | (916) 988 9473 | Electricians | Granite Bay · Placer County | — | — |
| K V N Construction INC | Vladimir Nikolayevich Kishchenko | — | (916) 396 8589 | GC, remodel, ADU | Auburn · Placer County | — | — |
| K&b Landscape | K&b Landscape | michaelk@kblandscape.com | (925) 838-1816 | Windows, patio, painters | Auburn · Placer County | — | — |
| K&s Fire Protection LLC | Salvatore Jr De Paola | — | (916) 719 2070 | Other | Loomis · Placer County | — | — |
| K-ray Construction | Kolby Ray Lesieur | — | (916) 206 0726 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| K2 Roofing LLC | Keaton Gregory Koonce | — | (916) 716 4818 | Other roofers | Auburn · Placer County | — | — |