| Joe Freitas Landscaping Co | Joe Fortuna Freitas | — | (916) 545-3148 | Windows, patio, painters | Anderson · Shasta County | — | — |
| John Hucke | John Hucke | — | (530) 246 1950 | GC, remodel, ADU | Shasta · Shasta County | — | — |
| John J Da Silva Jr | John J Da Silva Jr | — | (530) 347 5453 | Other | Cottonwood · Shasta County | — | — |
| John Kiefer Construction Company INC | Judith Marilyn Kiefer | — | (530) 604 5386 | GC, remodel, ADU | Anderson · Shasta County | — | — |
| John Liubakka Construction | John William Liubakka | — | (530) 510 6462 | GC, remodel, ADU | Anderson · Shasta County | — | — |
| John M Lucak Master Tile | John M Lucak Master Tile | — | (530) 549 5257 | Other | Palo Cedro · Shasta County | — | — |
| John May Installing | John May Installing | — | (530) 524 4168 | Other | Redding · Shasta County | — | — |
| John N Riley Construction | John Neal Riley | — | (530) 244 1166 | GC, remodel, ADU | Redding · Shasta County | — | — |
| John P Murray | John P Murray | — | (530) 474 3067 | Other | Shingletown · Shasta County | — | — |
| John Paul Buckley | John Paul Buckley | — | (228) 243 2729 | GC, remodel, ADU | Shasta Lake · Shasta County | — | — |
| John Riley Ashmore | John Riley Ashmore | — | (530) 515 5646 | Other | Redding · Shasta County | — | — |
| John Stansberry | John Stansberry | — | (530) 524 7560 | Other | Palo Cedro · Shasta County | — | — |
| John Thatcher Construction | John Harry Thatcher | — | (530) 243 2748 | GC, remodel, ADU | Redding · Shasta County | — | — |
| John W Laws Construction | John Wesley Laws | — | (530) 510 7118 | GC, remodel, ADU | French Gulch · Shasta County | — | — |
| Johnson Const | Johnson Const | — | (530) 395 6114 | GC, remodel, ADU | Bella Vista · Shasta County | — | — |
| Jon Williams Excavating INC | Jonathan Mark Williams | — | (530) 364 6549 | Other | Anderson · Shasta County | — | — |
| Jones Construction | Darrell Eugene Jones | — | (530) 241 3901 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Jones Construction | Aaron Gabriel Jones | — | (530) 209 3884 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Jose Elmer Cedillos Construction | Jose Elmer Cedillos | — | (818) 424 5484 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Joseph L Knighten Construction | Joseph Lee Knighten | — | (530) 515 8004 | GC, remodel, ADU | Shasta Lake · Shasta County | — | — |
| Joseph's Construction | Frank Fred Joseph | — | (530) 949 7977 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Josh Mack Construction | Joshua Herbert Mack | — | (530) 547 4744 | GC, remodel, ADU | Millville · Shasta County | — | — |
| Josh Watkins Construction | Joshua Grant Watkins | — | (530) 262 7311 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Josh Webb Construction | Joshua William Webb | — | (530) 722 5911 | GC, remodel, ADU | Igo · Shasta County | — | — |
| Js Construction | Charles Lucas Simonis | — | (530) 691 2446 | GC, remodel, ADU | Palo Cedro · Shasta County | — | — |
| Jsb INC | Paul Henry Guerrero | — | (530) 691 4411 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Jsn Flooring | Jsn Flooring | jsn.flooring2024@gmail.com | (530) 560-9638 | Other | Redding · Shasta County | — | — |
| Judd Buick Construction INC | John Judson Buick | — | (530) 949 8757 | Other | Redding · Shasta County | — | — |
| Junkersfeld Framing | Junkersfeld Framing | — | (530) 227 2647 | Other | Shasta Lake · Shasta County | — | — |
| Jw Fence | Jw Fence | — | (530) 215 1002 | Other | Redding · Shasta County | — | — |
| K & K Equipment INC | Sedar Sophia Kane | — | (530) 410 3337 | Other | Cottonwood · Shasta County | — | — |
| K C Finish Carpentry | K C Finish Carpentry | — | (772) 626 5030 | Other | Redding · Shasta County | — | — |
| K D Winegarden | K D Winegarden | — | (530) 524 8533 | GC, remodel, ADU | Redding · Shasta County | — | — |
| K M Installs | K M Installs | — | (530) 524 1890 | Other | Redding · Shasta County | — | — |
| K M S Wood Designs | K M S Wood Designs | — | (530) 510 6357 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| K Margrave Construction | Karen Ilene Margrave | — | (530) 782 1800 | GC, remodel, ADU | Redding · Shasta County | — | — |
| K N A General Construction | Keith Nolan Acker | — | (530) 347 0520 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| K Pearson Construction | Kevin Lee Sr Pearson | — | (530) 941 0115 | GC, remodel, ADU | Redding · Shasta County | — | — |
| K R Trucking & Backhoe Service | Kert Andrew Rulofson | — | (530) 524 4318 | Other | Cottonwood · Shasta County | — | — |
| K2 Development Company INC | Daniel Lee Knott | — | (530) 244 0596 | GC, remodel, ADU | Redding · Shasta County | — | — |