| Hp Hardscape And Construction | Phung Van Hoang | — | (415) 936 3638 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Hp Mechanical | Rodolfo| Herrer A Rudy Herrera | — | (707) 206 5913 | HVAC | Santa Rosa · Sonoma County | — | — |
| Hu Sheaujiun Construction | Hu Sheaujiun | — | (408) 513 7436 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hudock Fire Protection INC | Wade Harrison Hudock | anapbm@gmail.com | (707) 800 7481 | Other | Santa Rosa · Sonoma County | — | — |
| Hug Plumbing | Daniel Dare Hug | danielhug@comcast.net | (707) 566 7003 | HVAC | Santa Rosa · Sonoma County | — | — |
| Huggins Construction | Bryan Glenn Huggins | bryan11huggins@gmail.com | (707) 494 8142 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Hugh Futrell Corporation | Hugh Tyler Futrell | — | (707) 568 3482 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hughes Family Builders | Hughes Family Builders | — | (707) 732 6255 | GC, remodel, ADU | Vineburg · Sonoma County | — | — |
| Hugo Mendoza | Hugo Mendoza | — | (707) 479 0998 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Hulbert Heating & Air Conditioning INC | Douglas Jon Hulbert | — | (707) 794 8513 | HVAC | Cotati · Sonoma County | — | — |
| Hulette Construction | Loren Lee Hulette | — | (707) 953 6566 | GC, remodel, ADU | Occidental · Sonoma County | — | — |
| Humes Electrical Construction | David William Humes | — | (707) 484 5777 | Electricians | Guerneville · Sonoma County | — | — |
| Humphrey Construction | Jack Douglas Humphrey | info@humphreyconstruction.com | (707) 528 7577 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Humphreys & Humphreys INC DBA Deluxe Shotcrete & Concrete Constru | Kristen Anderson Humphreys | — | (707) 568 1200 | Other | Santa Rosa · Sonoma County | — | — |
| Huntington Construction | James Robert Huntington | — | (707) 865 9033 | GC, remodel, ADU | Occidental · Sonoma County | — | — |
| Hus Lee Miller | Hus Lee Miller | — | (323) 839 0898 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| HVAC Controls Corporation | Christopher Louis Tyler | — | (707) 794 9360 | HVAC | Cotati · Sonoma County | — | — |
| HVAC Essentials | Jarom Douglas Lewis | fmn@hvac-essentials.com | (707) 581 4822 | HVAC | Sebastopol · Sonoma County | — | — |
| Hwy 1 Plumbing | Hwy 1 Plumbing | — | (707) 921 9286 | Other | Santa Rosa · Sonoma County | — | — |
| Hybrid Home Performance | Hybrid Home Performance | — | (707) 431 4230 | GC, remodel, ADU | Healdsburg · Sonoma County | — | — |
| Hyper Pro Resource & Equipment INC | Kody Robert Hubert | — | (760) 686 4805 | Other | Santa Rosa · Sonoma County | — | — |
| Hz Landscaping | Hz Landscaping | — | (707) 933 7644 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Hzl Home INC | Sheaujiun Hu | — | (408) 513 7436 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| I B Carpet Co | Barajas Ignacio | — | (707) 328 8609 | Other | Rohnert Park · Sonoma County | — | — |
| I Fix & Build General Contractor | Jeffrey Walter Davidson | — | (707) 971 0293 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| I N I Construction | Aaron Regis Jackson | anapbm@gmail.com | (707) 548 4606 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| I Plumber | I Plumber | — | (707) 536 8772 | Other | Healdsburg · Sonoma County | — | — |
| I Pulido Construction | Israel Valencia Pulido | — | (707) 592 9673 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Ian Whipple Construction | Ian David Whipple | — | (707) 364 0514 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| Iconic Home Builder INC | Krischen Jhon Sandoval | iconichomebuilder@gmail.com | (707) 327 8408 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Icse Pro Builders LLC | Cristian Emanuel Albino | — | (415) 827 8236 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Ignacio Martinez Martinez | Ignacio Martinez Martinez | — | (707) 503 5397 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Image Electric | Jeffrey Michael Nielsen | — | (707) 762 9442 | Electricians | Petaluma · Sonoma County | — | — |
| Image Tree Pros LLC | Ross Clayton Anderson | info@imagetreepros.com | (707) 528 3300 | Other | Sebastopol · Sonoma County | — | — |
| Image Tree Service INC | Jeffrey Douglas Kowell | info@imagetreepros.com | (707) 838 3555 | Tree | Windsor · Sonoma County | — | — |
| Imperial Northbay Tile & Countertops | Andrew Alexander Mcclellan | — | (707) 755 0817 | Other | Santa Rosa · Sonoma County | — | — |
| In Tune Low Voltage Landscape Lighting | Scott Simon Copple | — | (707) 322 1117 | Other | Sonoma · Sonoma County | — | — |
| Incom Mechanical INC | Bret Andrew Barney | — | (707) 586 0511 | HVAC | Petaluma · Sonoma County | — | — |
| Independent Tile Services By Greg Wilkin | Gregory Jon Wilkin | — | (707) 228 8215 | Other | Rohnert Park · Sonoma County | — | — |
| Indoor Climate Control INC | Brian Robert Plum | — | (707) 894 9131 | HVAC | Cloverdale · Sonoma County | — | — |