| Denbar Tree Service INC | Bergen Asplund Smeding | — | (707) 696 1829 | Other | Pope Valley · Napa County | — | — |
| Dennett Construction INC | Alan Kingsley Dennett | — | (707) 363 1817 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dennis E Watson | Dennis E Watson | — | (707) 965 1100 | Other | Angwin · Napa County | — | — |
| Denny's Heating & Air Conditioning LLC | Dennis Edward Jr Ruise | — | (707) 254 9352 | HVAC | Napa · Napa County | — | — |
| Dependable Electrical Services INC | Scott E Dunbarr | jonpinhorn.typedesign@gmail.com | (707) 815 0896 | Electricians | Napa · Napa County | — | — |
| Devine Construction INC | Robert Anthony George | — | (707) 637 6509 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dewyer Contracting | Clayton Cole Dewyer | — | (707) 337 3622 | GC, remodel, ADU | St Helena · Napa County | — | — |
| Dexter Estate Landscapes | David Larkin Dexter | hello@dexterel.com | (707) 974 2655 | Windows, patio, painters | Calistoga · Napa County | — | — |
| Diamond Quality Water Features INC | Michael Patrick Benson | — | (707) 942 4772 | Pool | Calistoga · Napa County | — | — |
| Dk Aquatic INC | David Duncan Mc Nabb | — | (925) 935 3700 | Windows, patio, painters | Yountville · Napa County | — | — |
| Dk Mcnabb INC | David Duncan Mc Nabb | — | (925) 935 3700 | GC, remodel, ADU | Yountville · Napa County | — | — |
| Dkb Builders | Dkb Builders | — | (707) 363 0507 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dmn Construction | Dane Michael Nix | — | (707) 337 1138 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dn Anderson Construction Inc. | John Kevin Anderson | info@dnandersonconstruction.com | (707) 738 4270 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dodson Tree Service | Joshua Mark Dodson | josh@dodsontreeservice.com | (707) 260 9874 | Tree | Napa · Napa County | — | — |
| Dominion Plastering | William Shawn Hacker | — | (707) 688 0327 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| Don John Landscaping | Don John Wheelan | — | (707) 224 9427 | Windows, patio, painters | Napa · Napa County | — | — |
| Don Nichols | Don Nichols | — | (707) 252 7854 | Other | Napa · Napa County | — | — |
| Don Pridmore & Son Construction INC | Nanette Rose Wheeler | — | (707) 226 7093 | Electricians | Napa · Napa County | — | — |
| Don's Swimming Pool Center INC | Tad David Wangeman | — | (707) 255 5924 | Pool | Napa · Napa County | — | — |
| Doran Construction | Norbert Allen Doran | cahir@doran-construction.com | (707) 255 4407 | GC, remodel, ADU | Napa · Napa County | — | — |
| Doshier-gregson INC | Benjamin Gregson Webster | — | (707) 226 9698 | Other | American Canyon · Napa County | — | — |
| Dougherty Construction INC | Nelsen Larry Dougherty | — | (707) 631 4000 | GC, remodel, ADU | Napa · Napa County | — | — |
| Douglas A Hamilton | Douglas A Hamilton | — | (707) 326 1753 | GC, remodel, ADU | Angwin · Napa County | — | — |
| Dowdle & Sons Mechanical INC | Andrew Joseph Dowdle | — | (707) 224 6968 | HVAC | American Canyon · Napa County | — | — |
| Dp Builders | Dp Builders | — | (707) 322 4750 | GC, remodel, ADU | St Helena · Napa County | — | — |
| Dr Electric | Donal Joseph Ryan | — | (415) 794 9664 | Electricians | American Canyon · Napa County | — | — |
| Dragonfly Landscaping | Dragonfly Landscaping | — | (707) 331 0481 | Windows, patio, painters | Angwin · Napa County | — | — |
| Drywall Concepts | Adalberto Rubalcava | — | (415) 816 8774 | Other | Napa · Napa County | — | — |
| Dt Welsh Construction INC | Timothy George Welsh | — | (707) 224 2180 | GC, remodel, ADU | Napa · Napa County | — | — |
| Duckworth Construction | Sharon Louise Mc Donald | — | (707) 252 0362 | GC, remodel, ADU | Napa · Napa County | — | — |
| Duhig Construction INC | John Stewart Mort Duhig | — | (707) 738 0614 | Other | Napa · Napa County | — | — |
| Dulle Concrete | Dulle Concrete | — | (707) 815 9570 | Other | Napa · Napa County | — | — |
| Dulle Concrete Construction INC | Phil Thomas Jr Dulle | — | (707) 224 9575 | Other | Napa · Napa County | — | — |
| Duncan & Company | Kenneth Duncan Hudson | — | (707) 755 1000 | GC, remodel, ADU | Calistoga · Napa County | — | — |
| Duncan Door Cabinet And Millwork | Duncan Door Cabinet And Millwork | — | (707) 260 4707 | Other | Napa · Napa County | — | — |
| Dunne-right Remodeling | Dunne-right Remodeling | — | (707) 224 9900 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dynamic Electric LLC | Kris Allen Anderson | — | (707) 738 1111 | Electricians | Napa · Napa County | — | — |
| E C Schmitt & Co | Eric Conroy| Schmitt Eric Schmitt | — | (707) 224 7086 | GC, remodel, ADU | Yountville · Napa County | — | — |
| E L T Painting | E L T Painting | — | (707) 260 4970 | Windows, patio, painters | Napa · Napa County | — | — |