| Ingram Construction Services | Ingram Colin | — | (415) 794 8149 | GC, remodel, ADU | Chester · Plumas County | — | — |
| Integrity Heating And Air LLC | Frank Erwin Emsoff | — | (530) 249 3697 | HVAC | Chilcoot · Plumas County | — | — |
| Ironwood General Contracting INC | Hugo Armando Caballero Santana | — | (775) 453 3083 | GC, remodel, ADU | Portola · Plumas County | — | — |
| Isaac The Painter | Isaac The Painter | — | (530) 375 0228 | Windows, patio, painters | Chester · Plumas County | — | — |
| Island Painting | Island Painting | — | (530) 836 1345 | Windows, patio, painters | Clio · Plumas County | — | — |
| J D Blesse Construction | James Donald Blesse | — | (530) 251 6404 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| J Marquette Construction | Jeremiah Dilger Marquette | — | (530) 258 7968 | GC, remodel, ADU | Clio · Plumas County | — | — |
| J Mckenzie Painting INC | Jason Randall Mckenzie | — | (701) 690 1624 | Windows, patio, painters | Portola · Plumas County | — | — |
| J P F Construction | Jeanne Paula Fagliano | — | (530) 521 6232 | GC, remodel, ADU | Portola · Plumas County | — | — |
| J W Harris Plumbing And Rooter | Jonathan Wayne Jr Harris | — | (530) 394 0165 | Other | Portola · Plumas County | — | — |
| Jack Fanning Painting | Jack Fanning Painting | — | (530) 816 1654 | Windows, patio, painters | Chester · Plumas County | — | — |
| Jack Steward Construction | Jack William Steward | — | (530) 575 5319 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| James Arevalo | James Arevalo | — | (530) 836 2407 | GC, remodel, ADU | Graeagle · Plumas County | — | — |
| Jay Bird Electric | Jonathan James Berardino | — | (707) 888 7232 | Electricians | Clio · Plumas County | — | — |
| Jensen Plumbing | Jensen Plumbing | — | (530) 816 0839 | Other | Chester · Plumas County | — | — |
| Jeremy R Deocampo Pump & Well Service LLC | Jeremy Robert Deocampo | — | (530) 283 1302 | Other | Quincy · Plumas County | — | — |
| Jim West Tree Service | Jimmy Dewayne West | — | (530) 927 8890 | Tree | Cromberg · Plumas County | — | — |
| John Eisner Painting | John Eisner Painting | — | (530) 375 0898 | Windows, patio, painters | Greenville · Plumas County | — | — |
| John Kuipers Plumbing | John Kuipers Plumbing | — | (530) 283 3119 | Other | Meadow Valley · Plumas County | — | — |
| K M Construction | Kenneth Eugene Michael | — | (775) 741 5000 | GC, remodel, ADU | Portola · Plumas County | — | — |
| Kennedy Pest Control Inc. | Kennedy Pest Control Inc. | — | (760) 492-7359 | Pest, tile roofs | Escondido · Plumas County | — | — |
| Kennys Residential Remodeling Service | Kenneth Lee Job | — | (209) 865 8669 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| Kevin Davis Construction | Kevin Franklin Davis | — | (805) 455 6442 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| Kingdon Construction | Travis Samuel Kingdon | — | (530) 591 9050 | GC, remodel, ADU | Taylorsville · Plumas County | — | — |
| Klemesrud Construction | Jason Mark Klemesrud | — | (530) 305 4423 | GC, remodel, ADU | Graeagle · Plumas County | — | — |
| Kluge Construction | Patrick Ryan Kluge | — | (530) 521 6453 | GC, remodel, ADU | Chester · Plumas County | — | — |
| Kremer Construction | Jason Lee Kremer | — | (530) 258 7512 | Other roofers | Chester · Plumas County | — | — |
| Kris Gunn Construction Incorporated | Kristapher Marc Gunn | — | (530) 616 1225 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| Kunsman Fence Co | Thomas Wayland Jr Burnett | — | (530) 249 2887 | Other | Portola · Plumas County | — | — |
| Lafe J Alexander | Lafe J Alexander | — | (530) 283 4803 | GC, remodel, ADU | Meadow Valley · Plumas County | — | — |
| Lake Almanor Drywall | Lake Almanor Drywall | — | (530) 258 4169 | Other | Chester · Plumas County | — | — |
| Lambert Construction INC | Norman Duane Lambert | proteam@mopro.com | (530) 394 7499 | Other | Quincy · Plumas County | — | — |
| Langley Design & Remodel | Langley Design & Remodel | — | (530) 260 6795 | GC, remodel, ADU | Quincy · Plumas County | — | — |
| Larry Patrick Knadler | Larry Patrick Knadler | — | (530) 570 7617 | Electricians | Chester · Plumas County | — | — |
| Lazzarino Machine Works | Lazzarino Machine Works | — | (530) 283 1905 | Other | Quincy · Plumas County | — | — |
| Leal Construction | Joshua Joseph Leal | — | (530) 520 1472 | GC, remodel, ADU | Portola · Plumas County | — | — |
| Leland Harvey Mc Neill Jr | Leland Harvey Mc Neill Jr | — | (530) 251 7790 | GC, remodel, ADU | Chester · Plumas County | — | — |
| Lights Creek Construction | Roy Edward Hammerich | — | (916) 990 2049 | GC, remodel, ADU | Greenville · Plumas County | — | — |
| Link Engineering Enterprises | Mark Allen Lampe | — | (530) 228 1752 | Other | Quincy · Plumas County | — | — |
| Little Construction | Michael Troy Little | — | (530) 927 9718 | GC, remodel, ADU | Quincy · Plumas County | — | — |