| De Justo Plumbing | Michael Angelo Dejusto | dejustoplumbing@gmail.com | (707) 322 9873 | Other | Santa Rosa · Sonoma County | — | — |
| De Loza Drywall | De Loza Drywall | info@delozadrywall.com | (707) 479 3616 | Other | Rohnert Park · Sonoma County | — | — |
| De Martini Electric INC | Scott David De Martini | — | (707) 947 3627 | Electricians | Sonoma · Sonoma County | — | — |
| De Rutte Builders Corporation | Mark Hillary De Rutte | — | (707) 483 6725 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| De Rutte Company Builders INC | Stanley Greer De Rutte | — | (707) 481 4370 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Dea Construction | Dirk Emery Atkinson | — | (707) 338 5589 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Deaken Construction | Kenneth Louis Jr Bagwell | — | (702) 604 9358 | GC, remodel, ADU | Guerneville · Sonoma County | — | — |
| Deangelis Construction INC | Courtney Jo Deangelis | info@deangelisconstruction.com | (707) 546 3060 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Dearborn Landscape Services | Philip Scott Dearborn | — | (707) 887 8264 | Windows, patio, painters | Sebastopol · Sonoma County | — | — |
| Deckmaster Fine Decks INC | Weston Andrew Leavens | — | (707) 824 0386 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Decor Door And Window | Decor Door And Window | — | (707) 874 9040 | GC, remodel, ADU | Occidental · Sonoma County | — | — |
| Dee Gee's Plumbing Services INC | Daniel Robert Gray | info@deegeesplumbingservices.com | (707) 494 6064 | Other | Santa Rosa · Sonoma County | — | — |
| Dee Jays Sash & Glass INC | Kelly Suzanne Doughty | — | (707) 546 7344 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Dee Maxx Builders INC | Daniel Gonzalez | — | (707) 710 4110 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Deenihan Painters And Decorators | Deenihan Painters And Decorators | — | (707) 938 8862 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Deering And Sons Construction | Ezra Evangelos Deering | — | (707) 479 2073 | GC, remodel, ADU | Guerneville · Sonoma County | — | — |
| Del Development INC | David Edmond Larrieu | — | (707) 568 6525 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Del Grosso Design | Del Grosso Design | — | (707) 318 2705 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Del Oro Electric | Vargas Vicente | — | (707) 285-0862 | Electricians | Petaluma · Sonoma County | — | — |
| Delaney Plumbing | Derek Michael Dolan | — | (707) 689 6082 | Other | Sebastopol · Sonoma County | — | — |
| Delgado Plumbing | Delgado Plumbing | — | (707) 513 6532 | Other | Santa Rosa · Sonoma County | — | — |
| Della Bruna Construction | Arthur Peter Della Bruna | — | (707) 396 2664 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Delore Mechanical | Delore Mechanical | — | (707) 364 5358 | HVAC | Rohnert Park · Sonoma County | — | — |
| Delta Sandblasting Company INC | Katherine Joyce Sanders | — | (707) 647 3250 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Deluxe Bath And Kitchen | Nestor Daniel Moya | — | (707) 867 6778 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Demar INC | Steven Don De Martini | — | (707) 996 5581 | Other | Sonoma · Sonoma County | — | — |
| Demeo Construction | Mark James Jr De Meo | contact@demeoconstruction.com | (707) 570 5947 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| Deming Electric LLC | Jason Mark Deming | kevin@demingelectric.com | (707) 548 8230 | Electricians | Rohnert Park · Sonoma County | — | — |
| Demings Demolition | Demings Demolition | — | (707) 938 4198 | Other | Sonoma · Sonoma County | — | — |
| Denco | Dennis Martin Bonilla | — | (707) 953 8461 | Other | Petaluma · Sonoma County | — | — |
| Denis Michael Solan | Denis Michael Solan | — | (415) 497 4248 | Electricians | Sebastopol · Sonoma County | — | — |
| Dennes Allen Construction | Dennes William Allen | — | (707) 364 4700 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Dennis E Debenham | Dennis E Debenham | — | (707) 975 6222 | Other | Cloverdale · Sonoma County | — | — |
| Dennis Furia Heating & Air Conditioning INC | Dennis Ray Furia | — | (707) 431 2323 | HVAC | Healdsburg · Sonoma County | — | — |
| Dennis J Amoroso | Dennis J Amoroso | — | (707) 280 1848 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Dennis M Tuohy Const | Dennis M Tuohy Const | — | (707) 823 0775 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Dennis Martin Ness | Dennis Martin Ness | — | (707) 477 9165 | GC, remodel, ADU | Guerneville · Sonoma County | — | — |
| Denny's Electric INC | Dennis Clyde Lickey | — | (707) 433 5230 | Electricians | Healdsburg · Sonoma County | — | — |
| Denny's Welding & Associates | Dennis Lee Morton | — | (707) 292 1472 | Other | Santa Rosa · Sonoma County | — | — |
| Denver 07 Construction | Joachim Arthur Huhn | — | (415) 244 8028 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |