| A & M Pool Service | Moreno Al | — | (949) 395 5381 | Pool | Oceanside · San Diego County | — | — |
| A & M Professional Painting INC | Fuentes Alejandro Tolentino | — | (619) 805 6494 | Windows, patio, painters | Spring Valley · San Diego County | — | — |
| A & M Reinforcing Specialists INC | Kevin William Ardent | — | (619) 334 6608 | Other | Santee · San Diego County | — | — |
| A & M Window And Door Installers INC | Don Meyers | — | (760) 975 6658 | Windows, patio, painters | Escondido · San Diego County | — | — |
| A & O Insulation INC | La Rosa Alejandro De | — | (619) 957 8707 | Other | National City · San Diego County | — | — |
| A & O Struct And Design DBA Cabinetry Woodworks | Madrigal Oscar | — | (619) 654 0217 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| A & P Construction Co | Atashfaraz Albert | — | (858) 527 5757 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A & P Drywall INC | Alfredo| Campos - Oceguera Alfredo Campos | — | (760) 233 5624 | Other | Escondido · San Diego County | — | — |
| A & R Electric | Alejandro Nmn Ruiz | — | (760) 623 6486 | Electricians | Escondido · San Diego County | — | — |
| A & R Ornamental Iron INC | Vallejo Ricardo | — | (619) 339 8023 | Other | El Cajon · San Diego County | — | — |
| A & S Flooring | Gutierrez Salvador | — | (619) 585 8057 | Other | Chula Vista · San Diego County | — | — |
| A & S Landscape Construction INC | Agustin Pimentel Jr Gonzales | aslandscapevc@gmail.com | (760) 807-2460 | Windows, patio, painters | Valley Center · San Diego County | — | — |
| A & S Painting | A & S Painting | — | (619) 593 0428 | Windows, patio, painters | San Diego · San Diego County | — | — |
| A & T Construction | Alan Joseph Jackson | — | (619) 540 8602 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| A & T Euro Cabinetry LLC | Andre Trachsel | — | (858) 405 2233 | Other | La Mesa · San Diego County | — | — |
| A + Plus Sprinklers | A + Plus Sprinklers | — | (760) 419 8752 | Windows, patio, painters | Carlsbad · San Diego County | — | — |
| A + Tree Service | Jose Luis Pacheco | — | (619) 647 5048 | Tree | Spring Valley · San Diego County | — | — |
| A - 1 Prestige Plumbing INC | James Tracy Thiry | — | (858) 748 3448 | Other | Poway · San Diego County | — | — |
| A - Accountable Business Systems | A - Accountable Business Systems | — | (619) 246 4158 | Other | San Diego · San Diego County | — | — |
| A - Frame Builders | A - Frame Builders | — | (858) 922 0741 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| A - Lectric INC | Duc Huu Nguyen | eddie.haro@electricare.com | (858) 310 9391 | Electricians | San Diego · San Diego County | — | — |
| A - M Concrete | A - M Concrete | — | (760) 518 5007 | Other | Fallbrook · San Diego County | — | — |
| A - Plus Electric | Antonyan Mikhail | — | (858) 518 0271 | Electricians | Vista · San Diego County | — | — |
| A - Rayman Electric INC | Ramon Francisco Bennett | — | (760) 807 1007 | Electricians | Escondido · San Diego County | — | — |
| A - T E A M Contractors INC | James Robert Codde | admin@ateamcontractors.com | (760) 758 5777 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| A - Team | A - Team | — | (760) 630 4987 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| A - Team Residential Remodeling | A - Team Residential Remodeling | — | (619) 578 4459 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| A / C Mechanical Sol INC | Bozickovic Mladen | — | (858) 733 1534 | HVAC | San Diego · San Diego County | — | — |
| A / G General Contracting And Painting INC | Anthony Carl| Gonzales Tony Carl Gonzales | — | (619) 585 1515 | GC, remodel, ADU | Pine Valley · San Diego County | — | — |
| A 2 M Contractors INC | Gregg Joseph Sharp | — | (619) 395 1348 | Other roofers | Chula Vista · San Diego County | — | — |
| A 5 Computer Services | Ronald Clayton Davis | — | (619) 987 9309 | Other | El Cajon · San Diego County | — | — |
| A A A - Pro 1 Rain Gutters | Gregory James Martin | — | (760) 445 8762 | Other | San Marcos · San Diego County | — | — |
| A A A Glass | Michael Homin Hyun | — | (858) 549 2200 | Windows, patio, painters | San Diego · San Diego County | — | — |
| A A A Remodeling | A A A Remodeling | — | (858) 210 2980 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A A B Plumbing INC | Sam Abraham | — | (310) 651 0322 | Other | San Diego · San Diego County | — | — |
| A A Divine Legacy General Contractors INC | Juan Alejandro Vazquez | — | (619) 519 2852 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| A A Landscaping | A A Landscaping | — | (760) 710 7058 | Windows, patio, painters | Escondido · San Diego County | — | — |
| A A Ok Garage Door Sales & Service | Jerome Charles Regner | — | (858) 578 4130 | Other | San Diego · San Diego County | — | — |
| A A Prestige Stone INC | Aleksey Aleksandrovi Pasechnik | aaprestigestone@gmail.com | (760) 917 8453 | Other | Vista · San Diego County | — | — |
| A Absolute Construction Welding INC | Todd Matthew Wood | — | (619) 212 5473 | Other | Lakeside · San Diego County | — | — |