| D A Construction | Dylan Andrew Joel Alvarado | — | (707) 799 8320 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| D B S Construction | David Brian Stutsman | — | (707) 272 2316 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| D Comp Construction | Danielle Christine Compa | — | (707) 357 0103 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| D Comp Construction INC | Danielle Christine Compa | — | (707) 357 0103 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| D Gregg Construction | Dustin Daniel Gregg | — | (707) 354 0950 | Other | Willits · Mendocino County | — | — |
| D L E Construction | Daniel Lewis Egger | — | (707) 489 8252 | GC, remodel, ADU | Manchester · Mendocino County | — | — |
| D Reynolds Construction | Darold Gene Reynolds | — | (707) 272 0812 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| D S P Construction | Daniel Stephen Pardini | — | (650) 255 2706 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| D T Fabrication Welding | D T Fabrication Welding | — | (707) 591 1811 | Other | Hopland · Mendocino County | — | — |
| Dan Harr Construction | Daniel Patrick Harr | — | (530) 864 4433 | GC, remodel, ADU | Littleriver · Mendocino County | — | — |
| Dances In Wood | Dances In Wood | — | (707) 984 8841 | GC, remodel, ADU | Laytonville · Mendocino County | — | — |
| Dancing Dog Design Build INC | Cynthia Ann Sharon | — | (707) 357 0339 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Daniel Steel & Machine INC | William Lee Daniel | — | (707) 462 6594 | Other | Ukiah · Mendocino County | — | — |
| Daniel's Painting | Daniel's Painting | — | (707) 813 8177 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Danny Mihelcic | Danny Mihelcic | — | (707) 489 6102 | Electricians | Willits · Mendocino County | — | — |
| Darin Mahan | Darin Mahan | — | (707) 489 3674 | Electricians | Ukiah · Mendocino County | — | — |
| Dark Gulch LLC | Kirk Lee Marshall | info@indiantypefoundry.com | (707) 734 0922 | Other | Fort Bragg · Mendocino County | — | — |
| Dave's Home Repair | Dave's Home Repair | — | (707) 354 2740 | GC, remodel, ADU | Covelo · Mendocino County | — | — |
| Dave's Plumbing | Dave's Plumbing | — | (707) 321 3663 | Other | Gualala · Mendocino County | — | — |
| David A Wallace | David A Wallace | — | (707) 895 3022 | Other | Philo · Mendocino County | — | — |
| David Brown DBA Dean Brown And Associates | David William Brown | — | (530) 575 1570 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| David Crossley | David Crossley | interested@domainmarket.com | (707) 272 3242 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| David Downey Earthworks | David Downey Earthworks | — | (707) 621 3024 | Other | Ukiah · Mendocino County | — | — |
| David G Hautala Plumbing Contractor | David G Hautala Plumbing Contractor | — | (707) 972 9727 | Other | Fort Bragg · Mendocino County | — | — |
| David Mc Kenzie Du Bose | David Mc Kenzie Du Bose | — | (707) 489 9770 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| David Taggart Construction | David Fergus Taggart | — | (650) 759 5902 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Dc Construction | Carse Daniel | — | (707) 357 1482 | GC, remodel, ADU | Laytonville · Mendocino County | — | — |
| De General Construction | Dustin Ryan Edwards | — | (916) 517 0422 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| De Haven Construction | Jesse Jason De Haven | henrydavid2222@hotmail.com | (707) 684 0776 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Decater Construction LLC | Christopher Michael Decater | — | (707) 354 1614 | GC, remodel, ADU | Covelo · Mendocino County | — | — |
| Deep Valley Electric | Christopher James Hinton | — | (707) 462 5200 | Electricians | Ukiah · Mendocino County | — | — |
| Delta Volt Electric LLC | Glenwood William Spurlock | — | (707) 684 0867 | Electricians | Ukiah · Mendocino County | — | — |
| Dennis Engineering | Dennis Engineering | — | (707) 964 7500 | Other | Fort Bragg · Mendocino County | — | — |
| Dennis L Hunt Construction | Dennis Lee Hunt | — | (707) 489 7935 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Devin Daniel Construction | Devin William Daniel | — | (707) 489 9191 | Other | Ukiah · Mendocino County | — | — |
| Devon Josephs | Devon Josephs | — | (707) 937 1231 | Other | Fort Bragg · Mendocino County | — | — |
| Diamond D Engineering | Megan Grace Lawson | — | (707) 953 4484 | Other | Ukiah · Mendocino County | — | — |
| Diaz Electric | Christopher John Diaz | anapbm@gmail.com | (707) 391 1926 | Electricians | Ukiah · Mendocino County | — | — |
| Dimensions In Wood | Dimensions In Wood | — | (707) 937 2216 | Other | Mendocino · Mendocino County | — | — |
| Dirty Fingers Landscaping | Dirty Fingers Landscaping | — | (707) 272 6731 | Windows, patio, painters | Ukiah · Mendocino County | — | — |