| Intrinsic Landscaping | Intrinsic Landscaping | — | (925) 705 1423 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Irish Painting | Irish Painting | — | (707) 741 9272 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Ishai Cohen | Ishai Cohen | — | (510) 851 0260 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Island Ohana Construction | Artemio Aguzar Baris | — | (415) 233 0726 | Other | Fairfield · Solano County | — | — |
| J & A Hardwood Flooring INC | Jorge Armando Ramirez | — | (707) 731 3038 | Other | Vallejo · Solano County | — | — |
| J & A Jeffery INC DBA Western Stabilization | Justine Ann Jeffery | — | (707) 678 0369 | Other | Dixon · Solano County | — | — |
| J & E Gonzalez Construction Incorporated | Jose Raul Gonzalez | — | (707) 333 9751 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| J & G Services INC | Jeffrey Michael Valente | %20gousse33@gmail.com | (510) 914 0220 | Pool | Benicia · Solano County | — | — |
| J & N Builders | Nicholas Michael Kuntz | — | (707) 718 4298 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| J & S Tileworks | J & S Tileworks | — | (707) 365 2244 | Other | Vacaville · Solano County | — | — |
| J B L Acoustics | Jason Bradley Lewis | estimator@jblacoustics.com | (707) 731 1755 | Other | Vallejo · Solano County | — | — |
| J Beltran Plumbing | J Beltran Plumbing | — | (707) 342 6668 | Other | Vallejo · Solano County | — | — |
| J C Garage Door Center | J C Garage Door Center | — | (707) 732 6764 | Other | Suisun City · Solano County | — | — |
| J C Garden Tree Service | Javier Cardenas | — | (707) 419 0100 | Tree | Suisun City · Solano County | — | — |
| J C Graphix | J C Graphix | — | (707) 514 5100 | Other | Vacaville · Solano County | — | — |
| J C H Construction | John Clayton Howland | — | (707) 552 9925 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| J C Heating And Air Conditioning INC | Jose Guadalupe Carreon Robles | — | (707) 666 0609 | HVAC | Benicia · Solano County | — | — |
| J D Delval Construction INC | Jairo Daniel Delval | — | (707) 816 2715 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| J D Drywall | J D Drywall | — | (707) 450 7942 | Other | Vacaville · Solano County | — | — |
| J F HVAC | Jaime Enrique Fiorentini | — | (707) 724 1045 | HVAC | Vacaville · Solano County | — | — |
| J G Concrete Construction | Gonzalez Jaime | — | (707) 515 8728 | Other | Vallejo · Solano County | — | — |
| J G Construction | Juan Antonio Gonzalez Nunez | — | (415) 408 8956 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| J Guisihan Construction | Rito Salarsa Jr Guisihan | — | (707) 862 1762 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| J I Electric | Jeffrey Travis Iribarren | — | (707) 689 4266 | Electricians | Vacaville · Solano County | — | — |
| J L Custom Tile & Stone INC | John Brandon Long | — | (707) 448 5328 | Other | Vacaville · Solano County | — | — |
| J M Wood Renu | J M Wood Renu | — | (707) 344 2316 | Windows, patio, painters | Fairfield · Solano County | — | — |
| J Mitchell Construction INC | Justin Mitchell Smith | — | (707) 514 7117 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| J P Landscapes | J P Landscapes | — | (925) 286 9193 | Windows, patio, painters | Vacaville · Solano County | — | — |
| J P Painting | J P Painting | — | (415) 378 6072 | Windows, patio, painters | Suisun City · Solano County | — | — |
| J P Painting & Decorating | J P Painting & Decorating | — | (707) 359 9703 | Windows, patio, painters | Vacaville · Solano County | — | — |
| J R Barber Construction | John Randall Barber | — | (707) 333 6536 | GC, remodel, ADU | Suisun City · Solano County | — | — |
| J R Flooring | J R Flooring | — | (530) 220 5756 | Other | Rio Vista · Solano County | — | — |
| J R H Dozing | J R H Dozing | — | (707) 564 0892 | Other | Vacaville · Solano County | — | — |
| J R Hauling Company INC | Jessica Melissa Rodriguez | — | (510) 230 6948 | Other | Vallejo · Solano County | — | — |
| J R P Construction | John Ray Jr Phipps | — | (510) 459 4065 | GC, remodel, ADU | Benicia · Solano County | — | — |
| J Segle Construction INC | Jesse Daniel Segle | — | (707) 342 5288 | GC, remodel, ADU | Benicia · Solano County | — | — |
| J Woods Painting And Repair | J Woods Painting And Repair | — | (951) 662 3469 | Windows, patio, painters | Benicia · Solano County | — | — |
| J&c Concrete Restoration INC | Carlos Alfonso Lopez Mendez | — | (707) 373 3937 | Restoration | Vallejo · Solano County | — | — |
| Jabali Construction INC | Jevon Chan | contracting@jabaliconstruction.com | (510) 707 8709 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Jack Morey's DBA Water Works Irrigation & Landscape | Water Works Irrigation & Landscape | — | (707) 447 4162 | Windows, patio, painters | Vacaville · Solano County | — | — |