| Jackson Drywall | Jackson Drywall | — | (707) 428 5951 | Other | Suisun City · Solano County | — | — |
| Jade Electric LLC | Timothy John Rubio | — | (510) 459 2645 | Electricians | Vallejo · Solano County | — | — |
| Jakes Pools | Jakes Pools | — | (925) 683 5558 | Pool | Benicia · Solano County | — | — |
| Jal Painting INC | Jose Luis Alvarez Ramos | — | (707) 333 6376 | Windows, patio, painters | Fairfield · Solano County | — | — |
| James Alexander Simons | James Alexander Simons | — | (707) 448 0143 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| James Builders | James Builders | — | (707) 746 6530 | GC, remodel, ADU | Benicia · Solano County | — | — |
| James Custom Tile | James Custom Tile | — | (707) 694 9703 | Other | Dixon · Solano County | — | — |
| James Edward Healy Jr | James Edward Healy Jr | — | (707) 689 3818 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| James Enterprise INC | Harrison Jr James | contact@james-enterprise.com | (707) 447 8500 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| James Lee Hanson Jr | James Lee Hanson Jr | — | (707) 373 9109 | Other | Vacaville · Solano County | — | — |
| James Patrick Folan Ii | James Patrick Folan Ii | — | (415) 250 1809 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Jamison Racking Solutions INC | Raymond Mark Reyna | — | (925) 395 4200 | Other | Fairfield · Solano County | — | — |
| Jap Landscape Construction INC | Juan De Dios Sr Perez | — | (707) 628 9255 | Windows, patio, painters | Elmira · Solano County | — | — |
| Javier Zarate | Javier Zarate | — | (707) 333 4892 | Other | Vallejo · Solano County | — | — |
| Jax Heating And Air | Jax Heating And Air | — | (707) 455 7181 | HVAC | Vacaville · Solano County | — | — |
| Jay Nykoluk DBA Craftsmen 333 | Jay Nykoluk DBA Craftsmen 333 | — | (707) 416 3807 | GC, remodel, ADU | Suisun · Solano County | — | — |
| Jay's Landscaping Service | Thuy Trong Hoang | — | (510) 755 6435 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Jb Wallpaper Installation | Jb Wallpaper Installation | — | (707) 803 6243 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Jbc Services INC | John Carlo Ferrer Espanol | — | (707) 334 5650 | HVAC | Vallejo · Solano County | — | — |
| Jc Construction | Jorge Ivan Rodas Contreras | — | (415) 572 3462 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Jc Construction | Jovanny Missael Chavez Corona | — | (707) 492 7657 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Jc Framing & Siding INC | Jorge Andres Cordova Barreto | — | (707) 208 8548 | Other | Suisun City · Solano County | — | — |
| Jc Plastering LLC | Juan Carlos Lopez | — | (707) 315 0393 | Other | Vallejo · Solano County | — | — |
| Jc's Glass | Jc's Glass | — | (707) 980 1456 | Windows, patio, painters | Benicia · Solano County | — | — |
| Jcci Incorporated | John Iii Brown | — | (707) 208 8380 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Jcp Fire Protection INC | Juan Carlos Perez Martinez | carlos@jcpfireprotection.com | (707) 360 1369 | Other | Fairfield · Solano County | — | — |
| Jd Remodel Services | Jose Anastasio De Leon Rodriguez | — | (510) 867 1953 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Jdm Concrete | Mikkal Raymond Elfers | — | (707) 249 1759 | Other | Vacaville · Solano County | — | — |
| Jeff Conrad Builder | Jeff Conrad Builder | — | (707) 486 2422 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Jeff Crowson | Jeff Crowson | — | (707) 451 2041 | Other roofers | Vacaville · Solano County | — | — |
| Jeff Zanassi Flooring | Jeff Zanassi Flooring | — | (707) 344 4821 | Other | Vacaville · Solano County | — | — |
| Jeffco Painting & Coating INC | Matthew Michael Eggley | — | (707) 562 1900 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Jeffrie Eugene Young | Jeffrie Eugene Young | — | (415) 999 6322 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Jeramie Johnsons Lath And Plaster | Jeramie Johnsons Lath And Plaster | — | (707) 660 1422 | Other | Dixon · Solano County | — | — |
| Jeremys Painting | Jeremy David Mason | jeremy.service2@gmail.com | (707) 330 5232 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Jerry Lee Mahoney | Jerry Lee Mahoney | — | (707) 554 1483 | Other | Vallejo · Solano County | — | — |
| Jerry's Painting INC | Gerald Kreim Linscheid | — | (707) 451 0925 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Jesse Campulli Plumbing | Jesse Campulli Plumbing | — | (510) 333 6217 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Jesse Lopez | Jesse Lopez | — | (707) 317 0580 | Other | Fairfield · Solano County | — | — |
| Jfl Fencing | Jfl Fencing | — | (707) 333 8990 | Other | Vacaville · Solano County | — | — |