| Johnston Construction | Samuel Donald Johnston | — | (530) 368 0009 | GC, remodel, ADU | Applegate · Placer County | — | — |
| Johnston's Tree Service | Russell Thomas Johnston | — | (916) 601 4004 | Tree | Rocklin · Placer County | — | — |
| Jon Bachmeier Construction | Jon Martin Bachmeier | — | (530) 386 4951 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Jon Linn | Jon Linn | — | (530) 346 2787 | Other | Colfax · Placer County | — | — |
| Jon Morrison | Jon Morrison | — | (916) 494 4621 | Windows, patio, painters | Roseville · Placer County | — | — |
| Jon Shepherd | Jon Shepherd | — | (916) 290 2592 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| Jon Steele | Jon Steele | — | (408) 674 6820 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Jonas Reyes Landscape | Huerta Jonas Reyes | — | (916) 678 9027 | Windows, patio, painters | Roseville · Placer County | — | — |
| Jonathan Mcbride DBA Mcbride Plumbing Works | Mcbride Plumbing Works | — | (916) 298 8829 | Other | Lincoln · Placer County | — | — |
| Jonathan Woods | Jonathan Woods | — | (916) 612 4272 | Electricians | Roseville · Placer County | — | — |
| Jones And Lamberti Builders INC | Coleman William Jones | — | (530) 370 6728 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Jones Built Welding And Fabrication LLC | Kyle Marshall Jones | — | (916) 300 8977 | Other | Loomis · Placer County | — | — |
| Joseph A Bews General Construction | Joseph Albert Bews | — | (916) 205 4313 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Joseph A Edgerton | Joseph A Edgerton | — | (916) 212 2504 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Joseph Morgan And Sons Construction INC | Joseph Michael Morgan | — | (916) 331 5025 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Joseph Quinn INC DBA West Shore Roofing | Joseph Michael Quinn | — | (530) 525 1938 | Other roofers | Homewood · Placer County | — | — |
| Josh Heckman Construction INC | Joshua Ryan Heckman | info@joshheckmanconstruction.com | (530) 852 2097 | GC, remodel, ADU | Penryn · Placer County | — | — |
| Josh Hinkey | Josh Hinkey | — | (916) 709 2383 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Josh Roberts Construction | Joshua Charles Roberts | joshrobertsconstruction@gmail.com | (530) 386 5650 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Joshua Besneatte | Joshua Besneatte | — | (530) 446 1527 | Electricians | Colfax · Placer County | — | — |
| Joshua Construction | Erasmo Michao Lopez | — | (916) 640 7133 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Joshua Thaddeus Mccann | Joshua Thaddeus Mccann | — | (916) 276 2828 | GC, remodel, ADU | Newcastle · Placer County | — | — |
| Jovic Construction | Luka Ratislav Jovic | — | (209) 534 8609 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Joyce Elizabeth Howard | Joyce Elizabeth Howard | — | (530) 320 5788 | Other | Loomis · Placer County | — | — |
| Jp Excavating And Paving | Jp Excavating And Paving | — | (530) 386 1664 | Other | Tahoe Vista · Placer County | — | — |
| Jp Welding & Fabrication INC | Jacob Alan Pennington | — | (916) 872 5199 | Other | Roseville · Placer County | — | — |
| Jpb Construction Co | John Preston Jr Bramow | — | (916) 521 1115 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Jpb Construction Corp | John Preston Iii Bramow | — | (916) 300 9640 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Jr Landscape Maintenance | Jr Landscape Maintenance | — | (916) 337 6377 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Jrp Construction | Juan Pablo Ortiz | — | (916) 944 9240 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Js Creative Masonry INC | Javier Silva | — | (916) 825 6248 | Windows, patio, painters | Sheridan · Placer County | — | — |
| Js Garage Doors LLC | Michael James Swiers | — | (916) 997 1898 | Other | Rocklin · Placer County | — | — |
| Jsc Engineers | Jsc Engineers | info@jscengineers.com | (858) 810-6155 | Electricians | Solana Beach · Placer County | — | — |
| Jsr Technical Services INC | Jagjit Singh Jr Ratra | — | (408) 802 7786 | Electricians | Newcastle · Placer County | — | — |
| Jt&m Tree Management LLC | Jorge Arturo Corona Tovar | — | (916) 412 7735 | Tree | Lincoln · Placer County | — | — |
| Jtm Remodeling | Alexandr Zaporojenco | — | (916) 544 3192 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Jtp Construction | Nestor Ademar Jr Paz | jtpbiz@jtpconstruction.com | (415) 342 8723 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Juen Construction | Kevin Patrick Juen | — | (707) 996 1456 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| Julian Heat And Air | Julian Heat And Air | — | (916) 532 7252 | HVAC | Rocklin · Placer County | — | — |
| Junior's Snow Removal And Excavation INC | Jeffrey Alan Wilson | — | (530) 583 9267 | Other | Olympic Valley · Placer County | — | — |