| Custom Concrete Concepts | Custom Concrete Concepts | interested@domainmarket.com | (707) 696 4724 | Other | St Helena · Napa County | — | — |
| Custom Heating And Air Conditioning | Custom Heating And Air Conditioning | — | (707) 257 6949 | HVAC | Napa · Napa County | — | — |
| Custom House | Warren Arthur Magee | — | (707) 226 5808 | Other | Napa · Napa County | — | — |
| Custom Landscaping | Custom Landscaping | — | (707) 253 7566 | Windows, patio, painters | Napa · Napa County | — | — |
| D A W Electric INC | Diyaa A Alwehbeh | — | (415) 871 5356 | Electricians | Napa · Napa County | — | — |
| D Bess Pump & Well Elect | David William Bess | — | (707) 337 3851 | Electricians | Napa · Napa County | — | — |
| D C Door Company | Steven Ray Cook | — | (707) 224 3030 | Other | Napa · Napa County | — | — |
| D E S Builders | Michael Gordon Odom | — | (707) 226 7600 | Electricians | Napa · Napa County | — | — |
| D G H Electric | Darwin Gary Healy | — | (707) 738 1508 | Electricians | Napa · Napa County | — | — |
| D H R Construction INC | Daniel Horacio Ramos | — | (707) 552 6500 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| D J M Construction | Douglas Jesus Estrel Mendoza | — | (707) 235 8276 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| D K B Electric INC | Kim Calles Perez | — | (707) 944 0655 | Electricians | Napa · Napa County | — | — |
| D L C Renovations | D L C Renovations | — | (707) 235 9251 | GC, remodel, ADU | Napa · Napa County | — | — |
| D T Landscaping Corporation | Sang Thanh Hoang | — | (707) 342 1771 | Windows, patio, painters | American Canyon · Napa County | — | — |
| Damiano Cereda | Damiano Cereda | — | (415) 374 3599 | Other | American Canyon · Napa County | — | — |
| Dan Knego Construction INC | Dan Paul Knego | — | (707) 738 9738 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dan The Tile Man | Dan The Tile Man | — | (707) 257 8579 | Other | Napa · Napa County | — | — |
| Dan's Creative Enterprises INC | Cunningham Daniel | — | (707) 481 5958 | Other | Calistoga · Napa County | — | — |
| Dan's General Construction INC | Daniel Ortega | — | (707) 315 7051 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| Daniel N Bazzoli | Daniel N Bazzoli | — | (707) 942 0138 | Other | Calistoga · Napa County | — | — |
| Daniel Spencer Travis | Daniel Spencer Travis | — | (707) 287 2294 | Other | Napa · Napa County | — | — |
| Dap Power Systems INC | David Anthony Purscell | — | (707) 304 4309 | Electricians | Napa · Napa County | — | — |
| Darlyn's Painting | Darlyn's Painting | — | (707) 301 8757 | Windows, patio, painters | Napa · Napa County | — | — |
| Darryl Heinke Construction | Darryl Duane Heinke | — | (707) 486 5756 | GC, remodel, ADU | Napa · Napa County | — | — |
| Daryl Charles Nix | Daryl Charles Nix | — | (707) 200 5466 | GC, remodel, ADU | Napa · Napa County | — | — |
| Dave May Construction | David Lee May | — | (707) 815 0322 | GC, remodel, ADU | Napa · Napa County | — | — |
| David Cornish Construction Services | David Charles Cornish | — | (707) 225 2742 | GC, remodel, ADU | Napa · Napa County | — | — |
| David Davenport Construction | David Lewis Davenport | — | (707) 333 7145 | GC, remodel, ADU | Napa · Napa County | — | — |
| David Foster INC | David Patrick Foster | — | (707) 742 9080 | GC, remodel, ADU | Napa · Napa County | — | — |
| David Patrick Electric | David Michael Patrick | — | (707) 254 5165 | Electricians | Napa · Napa County | — | — |
| David Savin Plumbing INC | David Mark Savin | — | (707) 312 0510 | Other | Napa · Napa County | — | — |
| De Alba Construction | Luis Alonso Salazar De Alba | — | (707) 913 0187 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| De Haro Landscaping | De Haro Landscaping | admin@deharolandscaping.com | (707) 330 8935 | Windows, patio, painters | Napa · Napa County | — | — |
| De Reza Landscaping INC | Luis Manuel De Reza | — | (707) 292 4797 | Windows, patio, painters | Napa · Napa County | — | — |
| Decius Construction INC | Daniel Robert Decius | — | (707) 738 1885 | GC, remodel, ADU | Napa · Napa County | — | — |
| Degarmo's Custom Wood Works INC | Richard Allan De Garmo | — | (707) 225 5059 | Electricians | Napa · Napa County | — | — |
| Degraw Electrical Contractors | Brandon Allen Degraw | — | (707) 363 1428 | Electricians | Napa · Napa County | — | — |
| Del Construction | Delgado Abel | info@del-construction.com | (707) 227 9421 | GC, remodel, ADU | Napa · Napa County | — | — |
| Delcomp Electric | James Albert Ii Lehman | — | (707) 337 4195 | Electricians | Napa · Napa County | — | — |
| Deluxe Sonoma Roof Repair | Deluxe Sonoma Roof Repair | — | (707) 926-4264 | Other roofers | Sonoma · Napa County | — | — |