| J R C Construction | Jacob Robert Conlon | — | (916) 303 0891 | GC, remodel, ADU | Loomis · Placer County | — | — |
| J R Electric | Joe Jimenez Rojas | — | (530) 386 3930 | Electricians | Kings Beach · Placer County | — | — |
| J R Krauss Ltd | Jon Richard Krauss | — | (530) 362 1161 | Other | Kings Beach · Placer County | — | — |
| J R Peterson Construction | John Robert Peterson | — | (925) 324 0800 | GC, remodel, ADU | Auburn · Placer County | — | — |
| J R Pierce Plumbing Co | Matthew William Pierce | info@ndiscovered.com | (916) 434 9554 | HVAC | Rocklin · Placer County | — | — |
| J R West Electric | James Robert West | — | (530) 263 8964 | Electricians | Roseville · Placer County | — | — |
| J Rice Enterprises INC | Jonathan Richard Rice | — | (603) 418 1037 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| J Smith & Sons INC | Ward Barrett Smith | — | (916) 924 9141 | Electricians | Roseville · Placer County | — | — |
| J W Prefabricated Specialties | J W Prefabricated Specialties | — | (916) 500 8176 | Other | Meadow Vista · Placer County | — | — |
| J Wilder Construction | John Wilder Wheelwright | — | (925) 683 7972 | Other | Roseville · Placer County | — | — |
| J Willis Construction INC | Jason Gordon Willis | — | (925) 788 7493 | GC, remodel, ADU | Penryn · Placer County | — | — |
| J3 Construction Development | David Wayne Carter | — | (279) 284 2885 | GC, remodel, ADU | Colfax · Placer County | — | — |
| J9 Engineering | Nathan Bryant Bloxsom | — | (916) 878 6722 | Other | Loomis · Placer County | — | — |
| Jaar Sales INC | John Bettencourt Flores | — | (916) 624 2092 | Other | Rocklin · Placer County | — | — |
| Jackson Family Construction | Elzie Ray Jr Jackson | — | (916) 257 7628 | GC, remodel, ADU | Sheridan · Placer County | — | — |
| Jackye's Drapery INC | Jackye Lynn Raiger | info@ndiscovered.com | (916) 599 2922 | Other | Roseville · Placer County | — | — |
| Jacobsen Dogehaus Builders | Peter Allen Jacobsen | — | (530) 308 4863 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Jacques & Sons Construction INC | Thomas Clifford Jacques | — | (530) 333 7791 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Jad Constructon INC | Dean Edward Rumberger | — | (916) 408 6850 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Jaeger Vacuum Excavation LLC | David Le Jon Jaeger | — | (916) 442 5400 | Other | Roseville · Placer County | — | — |
| James Backflow Service | James Edwin Green | — | (916) 203 2877 | Other | Loomis · Placer County | — | — |
| James E Williams & Son INC | Jimmy Ray Williams | — | (916) 771 5931 | Other roofers | Rocklin · Placer County | — | — |
| James Gillespy | James Gillespy | — | (916) 420 6795 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| James Henry Stripling | James Henry Stripling | — | (206) 488 4773 | Other | Roseville · Placer County | — | — |
| James Jason Lacroix | James Jason Lacroix | — | (916) 817 9900 | GC, remodel, ADU | Roseville · Placer County | — | — |
| James L Harris' Painting & Decorating INC | Theresa Lee Miller | — | (530) 888 0580 | Windows, patio, painters | Auburn · Placer County | — | — |
| James L Hopper Construction | James Lewis Hopper | — | (916) 759 0027 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| James N Owens | James N Owens | — | (916) 333 8797 | Windows, patio, painters | Dutch Flat · Placer County | — | — |
| James Stalie Construction INC | James Edward Stalie | — | (925) 454 1778 | GC, remodel, ADU | Newcastle · Placer County | — | — |
| Jamie Joe Reed Builder | Jamie Joe Reed Builder | — | (530) 305 8118 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Jare Construction | Jare Lok-wing | — | (916) 995 1347 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Jarrett Cox Painting | Jarrett Cox Painting | — | (831) 706-1763 | Windows, patio, painters | Colfax · Placer County | — | — |
| Jarrett Mechanical INC | Nicholas Allen Jarrett | office@jarrettmechanical.com | (916) 316 7278 | Other | Rocklin · Placer County | — | — |
| Jasmine Purscell | Jasmine Purscell | — | (916) 628 3164 | Electricians | Roseville · Placer County | — | — |
| Jason Anderson Construction INC | Jason Matthew Anderson | — | (916) 412 1524 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Jason Derrick Beggs | Jason Derrick Beggs | — | (530) 210 3176 | HVAC | Newcastle · Placer County | — | — |
| Jason Marconcini | Jason Marconcini | — | (916) 343 1850 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Jason Moulding Construction | Jason Thomas Moulding | — | (916) 261 4243 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Jason Wagner | Jason Wagner | — | (916) 303 6612 | Electricians | Roseville · Placer County | — | — |
| Jason's Painting Service | Jason Matthew Keim | — | (530) 613 6455 | Windows, patio, painters | Auburn · Placer County | — | — |