| Ken's Carpets | Kenneth Shawn Walpole | — | (415) 454 5367 | Other | San Rafael · Marin County | — | — |
| Kenilvort Plumbing INC | Brandon Christian Kenilvort | — | (415) 717 9460 | Other | San Rafael · Marin County | — | — |
| Kennedy Landscaping | Kennedy Landscaping | estimates@kennedylandscaping.com | (415) 789 0826 | Windows, patio, painters | Belvedere · Marin County | — | — |
| Kenneth Calvin Pratt | Kenneth Calvin Pratt | — | (415) 672 2681 | GC, remodel, ADU | Novato · Marin County | — | — |
| Kerr Construction Incorporated | Jeffrey Thomas Kerr | — | (415) 456 5300 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Kerry Chun Construction | Kerry Kai Chun | — | (415) 497 3007 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Kevin B Lorne | Kevin B Lorne | — | (415) 680 5436 | GC, remodel, ADU | Stinson Beach · Marin County | — | — |
| Kevin Hall Plumbing | Kevin Hall Plumbing | — | (415) 686 0730 | Other | San Rafael · Marin County | — | — |
| Kevin Kuhn Electric | Kevin Withers Kuhn | — | (415) 233 0332 | Electricians | Mill Valley · Marin County | — | — |
| Kevin Marcinek General Contractor | Kevin Marcinek General Contractor | — | (415) 898 9510 | GC, remodel, ADU | Novato · Marin County | — | — |
| Kevin Mcdaniel | Kevin Mcdaniel | — | (415) 720 2953 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Kevin Reilly Electric INC | Kevin Timothy Reilly | kreillyelectric@yahoo.com | (415) 503 7916 | Electricians | San Rafael · Marin County | — | — |
| Keystone Home Repair | Keystone Home Repair | — | (717) 554 0780 | GC, remodel, ADU | Novato · Marin County | — | — |
| Kime Bros Company LLC DBA Kb Construction | James Christopher Kime | — | (415) 465 2955 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Kinetic Lighting And Electric LLC | Isabella Marie Battig | — | (415) 569 7167 | Electricians | Mill Valley · Marin County | — | — |
| King Construction The | Reyes Ramirez Roberto | — | (415) 342 0763 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Kiwi Plumbing INC | Kevin George Burrell | — | (415) 518 8066 | Other | Sausalito · Marin County | — | — |
| Klep Construction INC | Luis Ernesto Pineda | info@klepconstruction.com | (415) 608 6738 | Electricians | Novato · Marin County | — | — |
| Klj Electric | Aaron Ross Johnson | kljelectric2020@gmail.com | (415) 596 2315 | Electricians | Novato · Marin County | — | — |
| Knight Electric | Henri Pierre Iii Bot | — | (415) 388 6252 | Electricians | Mill Valley · Marin County | — | — |
| Knoles Construction Co | Clifford Stanley Knoles | nick@knolesconstruction.com | (415) 408 3181 | GC, remodel, ADU | Novato · Marin County | — | — |
| Knowles Lumbercraft Construction LLC | Mathew Leon Knowles | — | (415) 758 1204 | GC, remodel, ADU | Belvedere Tiburon · Marin County | — | — |
| Kokalis Construction INC | Nickolas George Kokalis | — | (415) 988 9803 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Kowboy Creations INC DBA Kowboy Creations Carpentry | Simon James Fathers | — | (415) 574 1559 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Kroll Construction | Gabriel Carl Kroll | — | (415) 892 5432 | GC, remodel, ADU | Novato · Marin County | — | — |
| Kubisch Drywall | Kubisch Drywall | — | (628) 529 5548 | Windows, patio, painters | Novato · Marin County | — | — |
| Kunst Painting | Kunst Painting | office@kunstpainting.com | (707) 658-1431 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Kurt Jehling Construction INC | Kurt William Jehling | — | (415) 819 7974 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Kyle Gleason And Sons | Kyle Matthew Gleason | — | (509) 475 3618 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| L Hartmann Electric | Elizabeth Marie Hartmann | — | (415) 305 5489 | Electricians | Novato · Marin County | — | — |
| L&l General Construction INC | Esdras Abidan Mendez Diaz | — | (415) 419 4754 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| L. Rodas Construction INC | Luz Candido Rodas | — | (415) 524 6803 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| La Vita Building & Design | La Vita Building & Design | — | (415) 847 7745 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| La Vita Building Solutions | La Vita Building Solutions | — | (415) 847 3201 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Laco Fuska Construction | Ladislav Fuska | — | (415) 299 1530 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Lacues Plbg Co | Joseph John Lacues | — | (415) 320 0523 | Other | Novato · Marin County | — | — |
| Lamond Company INC | Calvin George Myers | firstname@lamond.com | (415) 215 5730 | GC, remodel, ADU | Novato · Marin County | — | — |
| Lamperti Contracting & Design INC | Sean Haskell Kelly | — | (415) 454 1623 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Lance Kuykendall | Lance Kuykendall | — | (415) 971 8373 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Land Construction | Andrew Mitchell Land | — | (415) 272 7396 | GC, remodel, ADU | Fairfax · Marin County | — | — |