| Design Air Heating And Air Conditioning | Ethan Vail Pogue | — | (805) 225 1911 | HVAC | Morro Bay · San Luis Obispo County | — | — |
| Design Electric Company | Gary Thomas Jackson | — | (805) 441 3023 | Electricians | Shell Beach · San Luis Obispo County | — | — |
| Design Images | Michael Steven Dzida | itown@nate.com | (805) 239 8909 | Windows, patio, painters | Paso Robles · San Luis Obispo County | — | — |
| Detail Flooring Company | Jeffrey Thomas Hatter | — | (805) 296 0778 | Other | Paso Robles · San Luis Obispo County | — | — |
| Devan Elliott Floor Covering | Devan Elliott Floor Covering | — | (805) 709 0580 | Other | Nipomo · San Luis Obispo County | — | — |
| Deville Renovations | Deville Renovations | — | (928) 890 9111 | GC, remodel, ADU | Pismo Beach · San Luis Obispo County | — | — |
| Dewald's Painting | Dewald's Painting | — | (805) 235 2646 | Windows, patio, painters | Oceano · San Luis Obispo County | — | — |
| Diablo Valley Builders INC | Nathan Laurence| Allen Nathan Laurence Love | — | (805) 345 6917 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| Diamond Construction | David Kent Goodwin | todd@diamond-construction.com | (513) 519-7766 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| Diamond Finish Painting & Stain INC | Michael Spencer Bishop | — | (805) 540 0806 | Windows, patio, painters | Oceano · San Luis Obispo County | — | — |
| Diamond Tree Service | Edward Cecil Gambel | interested@domainmarket.com | (805) 434 1436 | Tree | Templeton · San Luis Obispo County | — | — |
| Diamond X Construction | John Thomas Botts | — | (805) 610 5765 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| Diaz Concrete Company | Diaz Raul | — | (805) 200 4068 | Other | Nipomo · San Luis Obispo County | — | — |
| Diaz Landscaping | Diaz Landscaping | amkryukov@gmail.com | (805) 710 7655 | Windows, patio, painters | Nipomo · San Luis Obispo County | — | — |
| Diaz Plumbing | Diaz Plumbing | diazplumbing34@yahoo.com | (805) 748 0415 | GC, remodel, ADU | Nipomo · San Luis Obispo County | — | — |
| Dickson Floor Concrete Polishing LLC | Dickson Lucky Onwuma | — | (805) 712 2261 | Other | Paso Robles · San Luis Obispo County | — | — |
| Dillon's Plumbing | Dillon's Plumbing | — | (805) 602 8937 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Disciple Industries Engineering | Disciple Industries Engineering | — | (661) 747 0651 | Other | Arroyo Grande · San Luis Obispo County | — | — |
| Diversified Construction Clean Up & Weed Abatement | Gregory Dean Gallegos | — | (805) 441 8052 | Other | Grover Beach · San Luis Obispo County | — | — |
| Divine Painting | Divine Painting | — | (805) 473 0324 | Windows, patio, painters | Oceano · San Luis Obispo County | — | — |
| Dms Welding | Dms Welding | — | (805) 610 8325 | Other | Templeton · San Luis Obispo County | — | — |
| Dns Industries INC | David Alan Hanto | — | (805) 459 6294 | Other | Creston · San Luis Obispo County | — | — |
| Do - It - Right Framing | Jose Omar Arrastio Garcia | contact@doitrightframing.com | (805) 769 6671 | Other | Paso Robles · San Luis Obispo County | — | — |
| Do It Right Flooring | Do It Right Flooring | — | (805) 574 9329 | Other | Nipomo · San Luis Obispo County | — | — |
| Doc Miller's Heating And Air | Doc Miller's Heating And Air | — | (805) 296 1025 | HVAC | Paso Robles · San Luis Obispo County | — | — |
| Dodds Fire Sprinkler Design | Dodds Fire Sprinkler Design | — | (805) 291 0815 | Other | San Miguel · San Luis Obispo County | — | — |
| Doherty Construction | Tom Daniel Doherty | — | (805) 610 6611 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Doherty Construction | Gavin Michael Doherty | — | (805) 610 7356 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Don Brennan Painting | Don Brennan Painting | — | (805) 927 0213 | Windows, patio, painters | Cambria · San Luis Obispo County | — | — |
| Don Ford's Irrigation & Landscaping | Don Ford's Irrigation & Landscaping | — | (805) 459 7903 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Don Ritter Construction | Donald O Ritter | — | (805) 466 7396 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Donald Dillon Simar Plumbing Co | Donald Wayne Dillon | — | (805) 471 1368 | Other | Nipomo · San Luis Obispo County | — | — |
| Donald G Young Jr Concrete & Masonry INC | Donald George Jr Young | — | (805) 239 4777 | Other | Paso Robles · San Luis Obispo County | — | — |
| Dorman Hydro-seeding | Dorman Hydro-seeding | dormanhydro@yahoo.com | (805) 466 2555 | Other | Atascadero · San Luis Obispo County | — | — |
| Doshier Concrete Cutting | Doshier Concrete Cutting | — | (805) 610 5516 | Other | Atascadero · San Luis Obispo County | — | — |
| Double Overhead INC DBA Carl Brandt And Company | Carl Edward Brandt | — | (805) 927 8348 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| Doug Allred Construction INC | Douglas Owen Jr Allred | — | (805) 466 0662 | GC, remodel, ADU | Atascadero · San Luis Obispo County | — | — |
| Doug's Tile & Repair | Doug's Tile & Repair | — | (805) 459 3156 | Other | Oceano · San Luis Obispo County | — | — |
| Douglas D Drube | Douglas D Drube | — | (805) 709 4670 | Electricians | Grover Beach · San Luis Obispo County | — | — |
| Douglas Dart Construction | Douglas Kent Dart | — | (559) 960 5915 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |