| Joe Badger Construction INC | Joseph Michael Badger | — | (707) 495 5277 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Joe Fortuna Electric Co INC | Joseph Jr Fortuna | — | (707) 526 6599 | Electricians | Santa Rosa · Sonoma County | — | — |
| Joe Joseph Construction | Marcus Edward Joseph | — | (707) 931 9493 | GC, remodel, ADU | Kenwood · Sonoma County | — | — |
| Joe L Long Custom Builder | Joe L Long Custom Builder | — | (707) 738 8592 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Joe Lunardi Electric INC | Ray Joseph Lunardi | — | (707) 545 4755 | Electricians | Sebastopol · Sonoma County | — | — |
| Joe Monte Landscapes | Joe Monte Landscapes | — | (415) 342 2071 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Joe Moore Painting & Roofing | Joseph C Moore | — | (707) 837 0620 | Other roofers | Windsor · Sonoma County | — | — |
| Joe's Plumbing Service INC | Joseph Louis Jr Aguilar | — | (707) 762 8584 | Other | Petaluma · Sonoma County | — | — |
| Joel Isquith Construction | Joel Martin Isquith | — | (707) 888 4114 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| John A Clark | John A Clark | — | (707) 974 7699 | Other | Windsor · Sonoma County | — | — |
| John Allen Scudero | John Allen Scudero | — | (707) 328 9906 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| John Antonio Landscaping | John Antonio Landscaping | — | (707) 778 1560 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| John Beard Plumbing Services | John Clyde Beard | help@johnbeardplumbingservices.com | (707) 230 9380 | Other | Santa Rosa · Sonoma County | — | — |
| John Bianchi Electric | John Paul Bianchi | — | (707) 888 9798 | Electricians | Santa Rosa · Sonoma County | — | — |
| John Bishop Construction | John Bryan Bishop | — | (707) 799 6038 | GC, remodel, ADU | Fulton · Sonoma County | — | — |
| John Borg Plumbing Incorporated | John Patrick Borg | — | (707) 838 6023 | Other | Windsor · Sonoma County | — | — |
| John Boswell Construction | John P Boswell | — | (707) 695 8259 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| John Christopher Wilbur | John Christopher Wilbur | — | (805) 701 2360 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| John David Vrtiak General Contractor | John David Vrtiak General Contractor | — | (707) 695 0748 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| John Dericco Construction | Scott Gyven Mc Intosh | — | (707) 321 1355 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| John Du Bose DBA West County Construction | West County Constuction | — | (707) 869 9134 | GC, remodel, ADU | Guerneville · Sonoma County | — | — |
| John E Hughes | John E Hughes | — | (415) 328 1544 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| John F Elissethce | John F Elissethce | — | (415) 424 1555 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| John Fechter Construction INC | John A Fechter | — | (415) 521 9634 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| John Hinds Painting & Decorating | John Hinds Painting & Decorating | — | (707) 974 6901 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| John Howard Construction | John Frederick Howard | — | (707) 480 9348 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| John J Barone General Contractor | John J Barone General Contractor | — | (707) 765 1184 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| John Kinworthy | John Kinworthy | — | (707) 321 0724 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| John Kolnes DBA Johnny's Court Surfacing | Johnny's Court Surfacing | — | (707) 477 2358 | Other | Windsor · Sonoma County | — | — |
| John L Hughes | John L Hughes | — | (707) 953 0396 | GC, remodel, ADU | Forestville · Sonoma County | — | — |
| John Lundy | John Lundy | — | (415) 720 0650 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| John Lynch Electric INC | John James Lynch | — | (707) 343 8848 | Electricians | El Verano · Sonoma County | — | — |
| John Ottensmeyer Painting | John Ottensmeyer Painting | — | (707) 806 9906 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| John Owens Services INC | Owens John | leads.johnowensservices@gmail.com | (415) 456 2906 | HVAC | Petaluma · Sonoma County | — | — |
| John Poulson | John Poulson | — | (707) 578 1184 | Other | Santa Rosa · Sonoma County | — | — |
| John R Benward Co | John Robert Benward | — | (707) 484 2771 | Other | Kenwood · Sonoma County | — | — |
| John Reid Wood Works | John Reid Wood Works | — | (707) 823 5190 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| John Ruggeri Painting | John Ruggeri Painting | — | (707) 291 0085 | Windows, patio, painters | Sebastopol · Sonoma County | — | — |
| John S Schielein | John S Schielein | — | (707) 292 9734 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| John Schoettler Painting | John Schoettler Painting | — | (707) 694 9686 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |