| De La Torre | De La Torre | — | (916) 470 0696 | Other | Dixon · Solano County | — | — |
| De Leon Barrera Construction INC | Leon Rivera Erick De | — | (510) 963 7236 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| De Leon Ortiz Construction | Edinson Wilfredo De Leon Ortiz | — | (415) 747 5320 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| De Wolf's Nor Cal Tile | De Wolf's Nor Cal Tile | contact@dewolfsnorcaltile.com | (707) 359 4711 | Other | Vacaville · Solano County | — | — |
| Declan Builders INC | James Glen Pitcher | — | (707) 421 8924 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Deese's Trees | Deese's Trees | — | (541) 521 4245 | Tree | Vacaville · Solano County | — | — |
| Deise Construction | Brian Richard O'neill | — | (415) 684 6325 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Delaney + Chin INC | Christopher Denise Delaney | — | (415) 621 9899 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Delaney Construction | Thomas Henry Iii Delaney | — | (707) 416 1748 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Delatorre Septic And Trucking LLC | Jose Candido Delatorre | — | (707) 449 4378 | Other | Vacaville · Solano County | — | — |
| Delija Construction | Michael Joseph Delija | — | (650) 444 0176 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Delija Construction | Michael Joseph Delija | — | (650) 444 0176 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Dellco General Engineering | Dellco General Engineering | — | (707) 552 2524 | Other | Vallejo · Solano County | — | — |
| Delta Gunite Solano | Paul Angelo Guglielmoni | lecia@deltagunitesolano.com | (707) 685 4077 | Other | Vacaville · Solano County | — | — |
| Delta Landscaping | Gabriel Torres | deltarepairs92@gmail.com | (707) 747 1235 | Windows, patio, painters | Benicia · Solano County | — | — |
| Delta Painting & Coatings | Delta Painting & Coatings | — | (707) 639 3374 | Windows, patio, painters | Rio Vista · Solano County | — | — |
| Delta Scaffold INC | Francisco Javier Mendoza Izquierdo | — | (925) 852 3952 | Other | Vacaville · Solano County | — | — |
| Delta Tech Service INC DBA Cascade Facility Services | Curtis Speaker Johnson | — | (707) 745 2080 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Delta Temperature Control INC | Joseph William Cutt | — | (925) 250 9722 | HVAC | Rio Vista · Solano County | — | — |
| Demolition Services And Grading INC | Chicarino Christopher | — | (707) 989 8988 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Denluc Construction INC | Lucas Tarso Alves Da Silva | — | (415) 250 9700 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Dennis A Riesche | Dennis A Riesche | — | (707) 330 9933 | HVAC | Vacaville · Solano County | — | — |
| Dennis Painting INC | Dennis Marlon Santos | — | (415) 260 1110 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Dennis Sheehan Construction | Dennis William Sheehan | — | (925) 998 3438 | Electricians | Vallejo · Solano County | — | — |
| Dependable Heating & Air Conditioning | Robin Lynn Wagner | — | (707) 446 1511 | HVAC | Dixon · Solano County | — | — |
| Depests | Depests | — | (619) 755-7790 | Pest, tile roofs | Bonita · Solano County | — | — |
| Deramo Electric | John Paul Jr Deramo | — | (707) 689 3538 | Electricians | Vacaville · Solano County | — | — |
| Derodrick Keyon Nash | Derodrick Keyon Nash | — | (510) 214 2290 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Design Studio By Dixieline | Design Studio By Dixieline | — | (858) 465-1265 | Windows, patio, painters | Solana Beach · Solano County | — | — |
| Dg Electric Group | Daniel Gomez | — | (707) 712 4752 | Electricians | Benicia · Solano County | — | — |
| Dhillon Construction | Amritpal Singh Dhillon | — | (707) 344 0295 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Dhillon Electric Co | Kashmir Singh Dhillon | — | (707) 580 4652 | Electricians | Fairfield · Solano County | — | — |
| Diablo Country Construction | Robert Daniel Frank | — | (925) 250 2154 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Diablo Metal Works | Diablo Metal Works | — | (925) 584 2748 | Other | Rio Vista · Solano County | — | — |
| Diamond Pools & Spas INC | Christopher Michael Curtis | — | (707) 372 4756 | Pool | Vacaville · Solano County | — | — |
| Diamond Pools & Spas LLC | Trevor Christopher Curtis | — | (707) 451 4748 | Pool | Vacaville · Solano County | — | — |
| Diamond Stone Countertops | Antonio Martinez | — | (707) 332 1379 | Other | Benicia · Solano County | — | — |
| Dillon & Son's Construction | James Edward Dillon | — | (707) 315 6688 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Dino Landscaping | Dino Landscaping | — | (510) 599 9066 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Discount HVAC & Appliance Repair | Sergey Mirolyants | — | (415) 900 8181 | HVAC | Fairfield · Solano County | — | — |