| H D Designs INC | Eliseo Pabon | — | (707) 542 8450 | Other | Petaluma · Sonoma County | — | — |
| H L Dedrick Iv Enterprises INC DBA Dedrick Enterprises | Howard Louis Iv Dedrick | — | (707) 291 2780 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| H M D Landscapes | H M D Landscapes | david@hmdlandscapes.com | (707) 765 3973 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| H N G Construction | Wade Ryan Harris | — | (707) 490 9825 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| H20 Experts Pool Service | Christopher Paul Berger | — | (707) 235 3428 | Pool | Vineburg · Sonoma County | — | — |
| Habitat Builders | Habitat Builders | — | (415) 686 1966 | GC, remodel, ADU | Occidental · Sonoma County | — | — |
| Habitat For Humanity Sonoma County | Vicki Jo Vaughn | — | (707) 578 7707 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Habitats | Robert Russell Jr Karr | — | (707) 477 8028 | GC, remodel, ADU | Forestville · Sonoma County | — | — |
| Habkirk Construction | David Paul Habkirk | — | (775) 762 3713 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Haddly Plumbing | Haddly Plumbing | — | (707) 927 6521 | Other | Sonoma · Sonoma County | — | — |
| Hahn Construction | Andrew James Hahn | — | (510) 913 5149 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Halasz Construction | Stephan Alexander Halasz | — | (707) 889 2255 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Halaweh Commerical Construction | Yoseph Darwish Halaweh | — | (707) 236 2011 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Hale Construction | Kristofer Scott Hale | — | (707) 332 1254 | Other | Santa Rosa · Sonoma County | — | — |
| Hale's Hardwoods | Hale's Hardwoods | — | (707) 769 0599 | Other | Petaluma · Sonoma County | — | — |
| Hall Construction | Tobias Allschild Hall | — | (707) 536 1591 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hamilton Construction | Hamilton Frank | loren@hamilton-construction.com | (707) 953 2480 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Hamilton Homes | Hamilton Homes | casa@hamilton-homes.com | (707) 217 3788 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hammer Electric | Hammer Benjamin | — | (707) 888 4909 | Electricians | Santa Rosa · Sonoma County | — | — |
| Hammer Engineering LLC | Matthew Blaine Hammer | — | (707) 494 4763 | Other | Windsor · Sonoma County | — | — |
| Handcraft | Clinton James Jr Cowan | — | (707) 796 3425 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Handy Her | Denise Rae Hallgren | — | (707) 360 9578 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hanlon's Complete Cabinet Service | Gerald David Hanlon | — | (707) 938 1086 | Other | Sonoma · Sonoma County | — | — |
| Hanly Homes | Hanly Homes | — | (916) 822 3220 | GC, remodel, ADU | Glen Ellen · Sonoma County | — | — |
| Hannan Construction LLC | Dylan Joseph Hannan | info@hannanconstruction.com | (707) 322 5344 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hannibal's INC Electrical Construction | Daniel Alan Mc Goon | — | (415) 457 4044 | Electricians | Petaluma · Sonoma County | — | — |
| Hansen Construction | Frank Daniel Hansen | — | (707) 481 0677 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Hanson Electric | Bryan Louis Hanson | interested@domainmarket.com | (707) 757 4542 | Electricians | Santa Rosa · Sonoma County | — | — |
| Hanson Overhead Garage Door Service INC | Adam David Carver | — | (707) 526 7800 | Other | Cotati · Sonoma County | — | — |
| Hard Stone Concrete | Hard Stone Concrete | — | (707) 890 7170 | Other | Windsor · Sonoma County | — | — |
| Hardings Contracting | Daniel Robert Harding | — | (951) 652 4800 | Other roofers | Santa Rosa · Sonoma County | — | — |
| Hardstone Construction LLC | Peter Joseph Senecka | — | (707) 235 0719 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Hardware Tech Incorporated | George Michael Pioli | — | (707) 545 1543 | Other | Santa Rosa · Sonoma County | — | — |
| Harkey Construction INC | Jeffrey Lew Harkey | newproject@harkeyconstruction.com | (707) 836 1315 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Harmon Electric | Jeffrey Ryan Harmon | — | (415) 233 3086 | Electricians | Sebastopol · Sonoma County | — | — |
| Harmony Hardwoods | Harmony Hardwoods | — | (707) 542 4493 | Other | Santa Rosa · Sonoma County | — | — |
| Harrington Construction INC | Jarom Thomas Harrington | — | (707) 228 5125 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| Harris Builders | Harris Builders | — | (707) 483 5500 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Harris Company Concrete Construction INC | Kyle Ray Harris | — | (707) 246 5697 | Other | Penngrove · Sonoma County | — | — |
| Harris Enterprises | Aquarian Journey | — | (612) 423-1447 | Other | Healdsburg · Sonoma County | — | — |