| Korrine Tile | Korrine Tile | — | (408) 396 6404 | Other | Sunnyvale · Santa Clara County | — | — |
| Korts & Knight | Richard Donald Knight | — | (415) 606 5378 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kostas Electric | Kostantinos Filippos Markolefas | — | (408) 891 0235 | Electricians | San Jose · Santa Clara County | — | — |
| Kovax Landscaping | Kovacs Stephen | sales@kovaxlandscaping.com | (650) 924 0777 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Kpn Builders INC | Khanh Phi Nguyen | — | (669) 294 0766 | Electricians | San Jose · Santa Clara County | — | — |
| Kroeger Construction | David Yoshi Kroeger | — | (408) 921 1898 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kron Construction Co | Gerhard Richard Kron | — | (415) 271 9495 | GC, remodel, ADU | East Palo Alto · Santa Clara County | — | — |
| Kroum Tile | Kroum Tile | — | (408) 309 7716 | Other | San Jose · Santa Clara County | — | — |
| Krystal Water Pools Service And Repairs | Christopher Dennis Alfano | — | (408) 666 6029 | Pool | Gilroy · Santa Clara County | — | — |
| Ksn Customs Construction INC | Kristofer Swen Neilson | — | (408) 691 6872 | GC, remodel, ADU | Cupertino · Santa Clara County | — | — |
| Kth Builders | Yen Thanh Si Ho | — | (408) 828 3591 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kubro Construction | Terrence David Kurns | — | (408) 839 5800 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kumar Construction Management INC | Sunil Kumar Mudigonda | — | (469) 988 2766 | GC, remodel, ADU | Mountain View · Santa Clara County | — | — |
| Kupec Design | Kupec Design | — | (408) 621 3882 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Kusalo Construction LLC | Ivo John Kusalo | — | (408) 605 8412 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kvn Plumbing | Kvn Plumbing | — | (650) 334 8386 | Other | Sunnyvale · Santa Clara County | — | — |
| Kwang Il Kim | Kwang Il Kim | — | (408) 313 0382 | Windows, patio, painters | Campbell · Santa Clara County | — | — |
| Kwh Construction | Britton George Bigelow | — | (669) 232 6900 | Electricians | Gilroy · Santa Clara County | — | — |
| Kwon Construction | Choon Ju Kwon | — | (408) 655 3477 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Kyle Booth Construction | Kyle Lee Booth | — | (408) 375 3152 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kyleh Construction | Kyle Tuong Ha | — | (408) 666 7015 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Kyu Su Han | Kyu Su Han | — | (408) 316 5344 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| Kz Electrical | Zygadlo Kevin | admin@kzelectrical.com | (650) 630 4250 | Electricians | San Jose · Santa Clara County | — | — |
| Kz Finish Carpentry | Kz Finish Carpentry | — | (669) 888 4422 | Other | Gilroy · Santa Clara County | — | — |
| L & A Custom Homes INC | Kamran Aslanpour | — | (408) 387 0999 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| L & D Construction Co INC | Michael Alan Lodoen | info@ldconstruction.com | (408) 292 0128 | GC, remodel, ADU | Milpitas · Santa Clara County | — | — |
| L & E Bay Area Contractor | Luis Alberto Funes Castellanos | — | (650) 669 6856 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| L & J Ornamental Iron Work | Leonel Chavez Fernandez | — | (408) 998 4040 | Other | San Jose · Santa Clara County | — | — |
| L & M Electrical | Luis Rodriguez Mata | — | (650) 279 3400 | Electricians | San Jose · Santa Clara County | — | — |
| L & N Construction | Yunlong Hu | — | (669) 216 8135 | Electricians | Sunnyvale · Santa Clara County | — | — |
| L & P Constructors INC | Manjit Singh Saini | — | (408) 313 5400 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| L & T Tree Service INC | Luz Elena Guzman Coronado | — | (408) 841 0585 | Tree | San Jose · Santa Clara County | — | — |
| L B Construction Co | Ivica Louis Bandov | — | (650) 787 9149 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| L C Interiors INC | Fatima Mary Carapinha | — | (408) 919 2898 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| L C Networks INC | Scott Thanh Nguyen | support@lcnetworks.com | (408) 885 8888 | Other | San Jose · Santa Clara County | — | — |
| L C Painting | L C Painting | — | (408) 768 4610 | Windows, patio, painters | Sunnyvale · Santa Clara County | — | — |
| L C Services | Lerma Paul | — | (408) 912 8943 | GC, remodel, ADU | Morgan Hill · Santa Clara County | — | — |
| L F G Roofing INC | Luis Manuel Fernandez Gutierrez | — | (408) 661 0666 | Other roofers | San Jose · Santa Clara County | — | — |
| L H A Drywall INC | Luis Humberto Arellanos Celis | — | (669) 243 0446 | Other | Santa Clara · Santa Clara County | — | — |
| L H A Framing INC | Olvera Fernandez Luis | — | (408) 903 5754 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |