| Dan Mercado Landscaping INC | Daniel Fidel Mercado | — | (925) 766 9093 | Windows, patio, painters | Orinda · Contra Costa County | — | — |
| Dan Rhoe Construction | Daniel Dean Rhoe | — | (925) 640 2650 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Dan Schilling DBA Home Plumbing | Dan Schilling DBA Home Plumbing | — | (925) 735 9494 | Other | Danville · Contra Costa County | — | — |
| Dan Smith And Company Painting INC | Daniel Raymond Smith | — | (925) 676 5949 | Windows, patio, painters | Pleasant Hill · Contra Costa County | — | — |
| Dan's Renovations | Dan's Renovations | — | (925) 956 6626 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Dan's Tree Service | Daniel William Cooley | — | (510) 237 1630 | Tree | El Sobrante · Contra Costa County | — | — |
| Dana Lund Landscaping LLC | John Charles Rosenberg | — | (925) 415 5243 | Windows, patio, painters | Pacheco · Contra Costa County | — | — |
| Dancal Drywall | Rodriguez Daniel Caldera | — | (925) 306 9986 | Other | Antioch · Contra Costa County | — | — |
| Danco Service | Dennis Anthony Nelson | — | (925) 878 5770 | Other | Concord · Contra Costa County | — | — |
| Dang Dung | Dang Dung | — | (925) 759 3846 | Windows, patio, painters | Oakley · Contra Costa County | — | — |
| Daniel Bryan Greeson | Daniel Bryan Greeson | — | (925) 459 9200 | HVAC | Knightsen · Contra Costa County | — | — |
| Daniel Hromatko Construction | Daniel Paul Hromatko | — | (925) 212 3688 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Daniel J Schwartz | Daniel J Schwartz | — | (925) 305 5352 | Other | Concord · Contra Costa County | — | — |
| Daniel Medel Medel | Daniel Medel Medel | — | (925) 435 4249 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Danielle Padilla | Danielle Padilla | — | (510) 895 5500 | Windows, patio, painters | Brentwood · Contra Costa County | — | — |
| Danilo Construction | Juan Danilo Oseida Perez | — | (510) 384 4885 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| Danliv INC | Joseph Frank Jr Scerbo | — | (925) 434 5154 | Electricians | Danville · Contra Costa County | — | — |
| Danny B Meinecke DBA Refreshed Heating & Cooling | Refreshed Heating & Cooling | — | (925) 755 4440 | HVAC | Concord · Contra Costa County | — | — |
| Danville Glass Co | Deanna Lynn Connor | — | (925) 277 0555 | Windows, patio, painters | Lafayette · Contra Costa County | — | — |
| Danville Hardwood Company INC | Daniel Leo Yorke | — | (925) 838 1311 | Other | Danville · Contra Costa County | — | — |
| Danville Home Repair And Remodeling | Roger Lester La Brie | — | (925) 313 8956 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Danville Roofing Contractor & Roof Repair | Danville Roofing Contractor & Roof Repair | — | (925) 526-6506 | Other roofers | Danville · Contra Costa County | — | — |
| Danylo Zakusilov | Danylo Zakusilov | — | (925) 489 9719 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Darakhshan Enterprise | Darakhshan Enterprise | — | (510) 375 7000 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| Daren Pereda Construction | Daren Charles Pereda | — | (925) 383 2255 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Darrah Trucking & Excavating INC | Donald Everett Darrah | — | (925) 229 3725 | Other | Martinez · Contra Costa County | — | — |
| Darrell Amaral Landscape Service | Darrell Lee Amaral | — | (208) 800 1781 | Windows, patio, painters | Danville · Contra Costa County | — | — |
| Darrell Taylor Electrical Contracting | Darrell Edward Taylor | — | (510) 231 0604 | Electricians | El Cerrito · Contra Costa County | — | — |
| Darrin G Stanley Engineering | Darrin G Stanley Engineering | — | (925) 260 7079 | Other | Concord · Contra Costa County | — | — |
| Data Kable Technology INC | Karal Jean Turbes | — | (925) 829 6001 | Other | Danville · Contra Costa County | — | — |
| Daugtsons Home Improvement | Daugtsons Home Improvement | — | (925) 595 8589 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Dave C Dunn Company INC | David Cameron| Dunn Dave Cameron Dunn | — | (510) 385 1474 | Windows, patio, painters | Orinda · Contra Costa County | — | — |
| Dave Mc Namar Construction Co | David Marston Mc Namar | — | (925) 980 1760 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Dave Pettit Construction | David Vern Pettit | — | (925) 783 1561 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Dave R Miller | Dave R Miller | — | (510) 847 7674 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| Dave Sweet Painting | Dave Sweet Painting | — | (510) 660 9094 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Dave's Gardening Service | Dat Van Dinh | — | (925) 628 7848 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Dave's Pool Service | David Brian Hayes | — | (925) 829 4443 | Pool | San Ramon · Contra Costa County | — | — |
| Daveo INC | Avagyan Rudik | — | (925) 322 1415 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| David A York Construction | David Anthony York | — | (541) 680 3570 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |