| Discovery Land Care INC | Bud Edwin Bray | — | (707) 425 3822 | GC, remodel, ADU | Dixon · Solano County | — | — |
| Distefano Contracting | Thomas Leo Distefano | — | (510) 932 6121 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Distinctive Designs LLC DBA Distinctive Designs Builders | Stuart David Corns | — | (925) 330 8946 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Diversified Power Corporation | Kevin Marx Atwood | — | (707) 678 6328 | Electricians | Dixon · Solano County | — | — |
| Dixieline Lumber And Home Centers | Dixieline Lumber And Home Centers | — | (858) 755-0246 | Windows, patio, painters | Solana Beach · Solano County | — | — |
| Dixon Electric | Dixon Electric | — | (859) 217-6653 | Electricians | Dixon · Solano County | — | — |
| Dixon Fence Company INC | Martinez Vasquez Nicanor | — | (510) 714 6078 | Other | Dixon · Solano County | — | — |
| Dixon Glass Company LLC | Robert Anthony Cannova | — | (707) 678 3258 | Windows, patio, painters | Dixon · Solano County | — | — |
| Dixon Tractor & Gravel | Dixon Tractor & Gravel | — | (707) 678 3538 | Other | Dixon · Solano County | — | — |
| Dj3 Electric | Don Cayetano Iii Juarez | don32@dj3electric.com | (707) 718 0428 | Electricians | Vacaville · Solano County | — | — |
| Dk's Drywall Services | David Christian Kellen | david@dksdrywallservices.com | (707) 208 0102 | Other | Fairfield · Solano County | — | — |
| Dlm's Pool Service | Daniel Lee Marley | — | (707) 435 8220 | Pool | Vacaville · Solano County | — | — |
| Dm Vazquez Landscaping Deck & Fence | Vazquez David Machorro | info@dmvazquezlandscaping.com | (925) 956 3468 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Do It Right Builder & Design | Dwight Anthony Young | — | (510) 688 3467 | GC, remodel, ADU | Suisun City · Solano County | — | — |
| Do It Right Do It Once Plumbing | Negrete Gonzalo | — | (707) 400 3348 | Other | Fairfield · Solano County | — | — |
| Dolese Plumbing | Jonah Warner Dolese | — | (415) 412 2404 | Other | Vallejo · Solano County | — | — |
| Don Sheppard Construction | Donald Ray Sheppard | — | (707) 399 7744 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Don's Painting + D | Don's Painting + D | — | (707) 310 4732 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Done Right Security INC | Brandon Scott Newell | — | (510) 621 7686 | Alarm and generators | Benicia · Solano County | — | — |
| Dooley's Heating & Air | Dooley's Heating & Air | — | (707) 419 4555 | HVAC | Suisun City · Solano County | — | — |
| Dormatech Mechanical Systems INC | Mark Lee Mulholland | — | (707) 653 4344 | HVAC | Vallejo · Solano County | — | — |
| Doughty Brothers Construction | Lyle Dennis Doughty | doughtybrosconstruction@yahoo.com | (415) 424 5964 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Douglas Paint | Douglas Paint | — | (707) 455 7261 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Down Ii Earth Landscaping | Down Ii Earth Landscaping | — | (707) 330 3434 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Dozer Construction Services INC | Jack Jerald Swank | — | (707) 400 0525 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Dr Electric | Daniel Jude Robertson | — | (707) 426 2885 | Electricians | Fairfield · Solano County | — | — |
| Drainage Pros | Drainage Pros | — | (925) 944 5263 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Dream Ride Engineering INC | Kurt Roger Nelson | — | (707) 745 1380 | Other | Benicia · Solano County | — | — |
| Drill X Subsurface Corporation | Thomas Andrew Scott | — | (916) 799 8198 | Other | Dixon · Solano County | — | — |
| Duane Ibach | Duane Ibach | — | (707) 592 4322 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Duenas Duenas | Duenas Duenas | — | (510) 774 2611 | Other | Dixon · Solano County | — | — |
| Duncan House Construction | Duncan Ross Ii House | — | (510) 220 7271 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Dunivan Drywall INC | Bradley Robert Dunivan | — | (707) 447 2520 | Other | Vacaville · Solano County | — | — |
| Duran Construction | Duran Raymon | — | (707) 624 5603 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Dutton Kitchen And Bath | Dutton Kitchen And Bath | — | (707) 344 1608 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Duy Pham | Duy Pham | — | (510) 333 9921 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Dwyer Electric | Joseph George Dwyer | — | (707) 724 3235 | Electricians | Vacaville · Solano County | — | — |
| E B T General Construction | Elvis Berruico Tabungar | — | (213) 595 8789 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| E C Concrete Construction | Everardo Vasquez Chavez | — | (707) 427 8051 | Other | Fairfield · Solano County | — | — |
| E I P Construction | Mallory Matthew | — | (510) 851 3874 | GC, remodel, ADU | Vallejo · Solano County | — | — |