| Del Mar Landscape Maintenance INC | Race Luigi | — | (619) 697 9617 | Windows, patio, painters | Cardiff · San Diego County | — | — |
| Del Mar Painting | Del Mar Painting | — | (858) 354 6932 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Del Mar Reinforcing INC | Curt Bryan Davidson | — | (323) 496 2681 | Other | Carlsbad · San Diego County | — | — |
| Del Mar Steel INC | Tien Dinh Lam | contact@delmarsteel.com | (760) 743 2266 | Other | Escondido · San Diego County | — | — |
| Del Mar Tile And Stone Installations | John Raymond Nelson | — | (858) 864 6677 | Other | San Diego · San Diego County | — | — |
| Del Rae Window Coverings | Del Rae Window Coverings | — | (619) 206 0811 | Other | San Diego · San Diego County | — | — |
| Del Rio Construction And Design INC | Robert Dean Jr Broyles | — | (858) 524 9712 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Del Rio Landscape | Del Rio Landscape | — | (760) 496 9523 | Windows, patio, painters | San Marcos · San Diego County | — | — |
| Del Sol Pavers | Sinthia Montserrat Irianda | delsolpavers@gmail.com | (619) 788 6987 | Other | Santee · San Diego County | — | — |
| Del Sur Energy | Matthew John Traficonte | adam@aliveindustries.com | (858) 382 4867 | Electricians | San Diego · San Diego County | — | — |
| Del Sur Landscaping | Del Sur Landscaping | — | (619) 313 9839 | Windows, patio, painters | National City · San Diego County | — | — |
| Del Valle Heating & Air Conditioning INC | Marco Vinicio Lopez-Del Valle | info@delvalleheatcooling.com | (619) 654 0351 | HVAC | El Cajon · San Diego County | — | — |
| Del Valle Pools | Del Valle Pools | esamaduroff@delvallepools.com | (619) 875 7788 | Pool | El Cajon · San Diego County | — | — |
| Del Vecchio | Del Vecchio | — | (760) 744 1400 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Deland Development Co | James Allen Landstedt | — | (619) 997 7751 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| Delaney Hector Construction | Delaney Lauren Hector | — | (720) 413 1453 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Delauder Refrigeration A Partnership | Richard Owen Delauder | — | (760) 214 8878 | HVAC | Vista · San Diego County | — | — |
| Delco Tile & Stone | Delco Tile & Stone | — | (619) 261 4148 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Delegend Construction INC | Ryan James Delegge | contact@delegendconstruction.com | (760) 213 2905 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Deleren Construction | Matthew Jr Gouthier | delerenconstruction@gmail.com | (619) 251 9112 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Delgado Construction Enterprises INC DBA Quality Pools | David Delgado-Velasco | — | (619) 458 5858 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Delgado S T S | Delgado S T S | — | (760) 500 9370 | Other | Ramona · San Diego County | — | — |
| Delgado's Construction | Delgado Manjarrez Omar | — | (760) 687 5049 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Delgados General Construction INC | Felipe De Jesus Delgado-Olmos | — | (760) 917 5575 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Della-mora Heating And Air Conditioning | Della-mora Heating And Air Conditioning | dellamoraair@gmail.com | (619) 739 6161 | HVAC | Chula Vista · San Diego County | — | — |
| Delma Construction INC | Luis Antonio Maldonado | sales@delmaconstruction.com | (760) 604 0535 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Delmar Electric | Alberto Capilos Jr Delmar | — | (619) 719 6000 | Electricians | Chula Vista · San Diego County | — | — |
| Deloach Electrical Contractors INC | Dwain Allen Deloach | — | (760) 822 6052 | Electricians | Valley Center · San Diego County | — | — |
| Delorenzo Design Co LLC | Emmanuel David De Lorenzo | — | (760) 612 9977 | Other | San Diego · San Diego County | — | — |
| Delphi Construction | Christopher David Doctor | delphiconstruction@cox.net | (760) 419 5552 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Delta 9 Electric | Tebyanian Nader | normak@deltaelectric.com | (408) 858 2414 | Electricians | San Diego · San Diego County | — | — |
| Delta Blue Plumbing INC | Alejandro Montenegro | — | (619) 730 9330 | Other | Chula Vista · San Diego County | — | — |
| Delta C-9 INC | Omar Sahid Marron Toscano | — | (619) 941 4013 | Other | Chula Vista · San Diego County | — | — |
| Delta Construction Sd INC | Sobhan Alizadeh | — | (760) 300 5790 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Delta Development | Delta Development | — | (760) 822 4442 | Other | Vista · San Diego County | — | — |
| Delta Energy Designs Systems INC | Robert Michael Knapp | steved@precision-ac.com | (619) 579 9700 | HVAC | Alpine · San Diego County | — | — |
| Delta Force Plumbing | Edder Alfonso Buenrostro | — | (619) 203 3901 | Other | San Diego · San Diego County | — | — |
| Delta Heating & A/c DBA Delta Heating And Cooling | Jaffar Malek | steved@precision-ac.com | (619) 995 4929 | HVAC | El Cajon · San Diego County | — | — |
| Delta Home Improvement Specialists INC | Gerrod Ian Rabak | — | (760) 815 1200 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Delta Plumbing Sd INC | Alizadeh Shahran | — | (760) 300 5790 | GC, remodel, ADU | Escondido · San Diego County | — | — |