| Aptitude Plumbing Services | Espinoza Guillermo | — | (858) 837 6087 | Other | Escondido · San Diego County | — | — |
| Aptive Pest Control | Aptive Pest Control | — | (619) 363-0551 | Pest, tile roofs | San Diego · San Diego County | — | — |
| Apx Network Solutions | Joseph Michael La Mantia | — | (858) 699 6941 | Other | San Diego · San Diego County | — | — |
| Aq Electric INC | Abeer Adil Qasyonan | buildzoomsupport@blockrenovation.com | (619) 729 8414 | Electricians | San Diego · San Diego County | — | — |
| Aqua - Link Pools And Spas INC | Shawn Kenneth Cassady | — | (951) 704 2257 | Windows, patio, painters | Carlsbad · San Diego County | — | — |
| Aqua City Pools | Aqua City Pools | — | (619) 440 2525 | Pool | El Cajon · San Diego County | — | — |
| Aqua Clear Pool And Spa Maintenance | Ryan Clint Taylor | — | (858) 335 8245 | Pool | San Diego · San Diego County | — | — |
| Aqua Concepts | Aqua Concepts | — | (760) 504 5158 | Pool | Escondido · San Diego County | — | — |
| Aqua Diamond Pool Service & Repair INC | Morales Abel | — | (619) 852 0094 | Pool | Chula Vista · San Diego County | — | — |
| Aqua Fria Landscapes | Aqua Fria Landscapes | — | (619) 417 8818 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Aqua Go H20 Pool Services | Marcos Isaiah Haggerty | — | (619) 643 7333 | Pool | San Marcos · San Diego County | — | — |
| Aqua Masters Service | Alan Christopher Bateman | — | (760) 439 1802 | Pool | Vista · San Diego County | — | — |
| Aqua Pro Plumbing INC | Michael Roy Camozzi | — | (619) 507 4006 | Other | Bonita · San Diego County | — | — |
| Aqua Pro Rooter INC | Mario Alberto Jr Rodriguez | info@aquaprorooter.com | (619) 853 9328 | Other | Spring Valley · San Diego County | — | — |
| Aqua Seal INC | Michael Steven Murray | — | (619) 729 3821 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Aqua Solutions | Aqua Solutions | — | (619) 435 1768 | Other | Coronado · San Diego County | — | — |
| Aqua Tech Plumbing INC | Ivan Stoyanov Stanchev | kp.aquatech@gmail.com | (619) 382 0253 | Other | Poway · San Diego County | — | — |
| Aqua Works Swim Pool Service INC | Ruben Jose Meza | — | (619) 316 9668 | Pool | San Diego · San Diego County | — | — |
| Aquablue Pool Care | Aquablue Pool Care | — | (760) 803 3796 | Pool | Vista · San Diego County | — | — |
| Aquaflow Plumbing | Erik Salazar Monroy | aquaflowplumbing@gmail.com | (858) 260 9646 | Other | San Diego · San Diego County | — | — |
| Aquasoltech INC | Andrew Michael Merrick | — | (619) 221 0175 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Aquaspecs INC | Dean William Hudson | — | (619) 741 9104 | Pool | San Diego · San Diego County | — | — |
| Aquatic Specialties Pool Service & Repair | Dwayne Lowell Ingram | — | (760) 802 4955 | Pool | Vista · San Diego County | — | — |
| Aquila Energy LLC | Darin Michael Flick | info@aquilaenergy.com | (760) 542 2120 | Electricians | Vista · San Diego County | — | — |
| Aquino's Landscaping | Aquino's Landscaping | customerservice@aquinoslandscaping.com | (619) 528 1925 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Aquity Real Estate INC | Vincent Sleewa Dickow | — | (619) 252 1797 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Ar Concepts Design-build INC | Ryan Allen Mc Daniel | guy@infinitydesignbuild.com | (858) 945 3012 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Ar Construction Solutions | Raja Anu | — | (619) 315 6711 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Ar Design & Built LLC | Adriel Ramos | — | (619) 796 9537 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Ar Engineering Construction | Rodriguez Armando | — | (858) 201 1831 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Ar Legacy Builders INC | Pablo Enrique Romero | — | (760) 835 0373 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Ar Painting | Ar Painting | ar_painting@outlook.com | (619) 638 9386 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Ar Refinishing | Ar Refinishing | — | (619) 992 5890 | Other | San Diego · San Diego County | — | — |
| Arackal Plumbing & Home Solutions | Arackal Plumbing & Home Solutions | — | (619) 808 6911 | Other | San Diego · San Diego County | — | — |
| Arambula Construction INC | Mario Alberto Arambula | guy@infinitydesignbuild.com | (619) 410 4818 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Araujo Roofing INC | Jesus Araujo | support@contractorwebzone.com | (760) 532 4673 | Other roofers | Escondido · San Diego County | — | — |
| Arban Excavating & Grading | William Robert Jr Arban | — | (619) 562 7600 | Other | El Cajon · San Diego County | — | — |
| Arbees Plumbing INC | Russell Tyrell Brown | russell@arbeesplumbing.com | (718) 688 4490 | Other | Spring Valley · San Diego County | — | — |
| Arbor Artistry INC | Kevin Patrick Bejma | arborartistry@gmail.com | (760) 298-1294 | Tree | Oceanside · San Diego County | — | — |
| Arbor Task Tree Service | Grant Alman | — | (619) 250 7655 | Tree | Lemon Grove · San Diego County | — | — |