| Associated Heating Of S F | Associated Heating Of S F | — | (415) 585 0145 | HVAC | San Francisco · San Francisco County | — | — |
| Associated Heating Of San Francisco INC | Rodney Charles Kettell | — | (415) 585 0145 | HVAC | San Francisco · San Francisco County | — | — |
| Associated Terrazzo Company Incorporated | Robert Marcus Fontes | — | (415) 641 1995 | Other | San Francisco · San Francisco County | — | — |
| Astorga Construction INC | Emilio Amilcar Sr Moran | — | (415) 846 6896 | HVAC | San Francisco · San Francisco County | — | — |
| Astoria Construction | Klima Peter | — | (415) 885 9324 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| At6 Architecture + Design Build | Jason Park Langkammerer | — | (415) 503 0555 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Atco Pest Control | Atco Pest Control | — | (415) 897-1498 | Pest, tile roofs | Novato · San Francisco County | — | — |
| Atlantic Construction Co INC | Tonny Kin Bew Yee | interested@domainmarket.com | (415) 215 8316 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Atlas Building Company Holdings LLC DBA Build Atlas | Leonel Ramirez | — | (949) 880 5460 | Other roofers | San Francisco · San Francisco County | — | — |
| Atlas Painting Company | Keith Charles Hawkins | — | (415) 822 6520 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Atlas Plumbing & Rooter | Carlos Joel Ledesma | — | (650) 871 9863 | Other | San Francisco · San Francisco County | — | — |
| Atlas U S A Concrete | Vazquez Margarito Saavedra | — | (415) 822 2048 | Other | San Francisco · San Francisco County | — | — |
| Atompod Networks And Integration | Atompod Networks And Integration | — | (415) 308 9505 | Other | San Francisco · San Francisco County | — | — |
| Atp Construction Cleaning Services | Christopher Lynn Washington | — | (415) 468 5500 | Other | San Francisco · San Francisco County | — | — |
| August Roof | August Roof | — | (415) 608 6682 | Other roofers | San Francisco · San Francisco County | — | — |
| Aura Building Company LLC | Kanupriya Arora | — | (219) 796 5227 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Aura Fire Safety | Vladi Atlantis Aura | — | (415) 333 2588 | Electricians | San Francisco · San Francisco County | — | — |
| Auspicious Construction LLC | Hira Allah Bakhsh | contact@auspiciousconstruction.com | (408) 692 5771 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Aventra Engineering Services INC | Manoochehr Pakkhoo | — | (925) 588 3648 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Avm Fire Protection INC | William Francis Jr Murphy | eben@eyebytes.com | (415) 797 9217 | Other | San Francisco · San Francisco County | — | — |
| Avraham Riskin | Avraham Riskin | — | (415) 337 7773 | Electricians | San Francisco · San Francisco County | — | — |
| Aw Electrical INC | Adam Gerard Wade | — | (415) 309 9461 | Electricians | San Francisco · San Francisco County | — | — |
| Ax9 Security | San Francisco | Ax9 Security | San Francisco | — | (415) 854-7486 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Axel8 Construction LLC | Consulting INC Unicorn | — | (415) 531 5998 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Axion Plumbing | Lopez Ramon Padilla | axionplumbing1@gmail.com | (415) 672 0249 | Other | San Francisco · San Francisco County | — | — |
| Aya Homes LLC | Shahrokh Ajdari | ssajdari@gmail.com | (770) 364 4177 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Ayala's Color & Concepts | Marta Guadalupe Ayala | — | (415) 724 5175 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Ayoob & Peery Plumbing Co INC | Josephine Salangsang Mchugh | — | (415) 550 0975 | HVAC | San Francisco · San Francisco County | — | — |
| Az Garage Door Repairs | Assayag Elad | — | (415) 806 9790 | Other | San Francisco · San Francisco County | — | — |
| Azari Property Management | Azari Property Management | — | (415) 377-4115 | Property managers | San Francisco · San Francisco County | — | — |
| Aziel General Construction INC | Rodriguez Orlan Aguilar | — | (415) 994 9917 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Azul Works INC | Leonid I Gvozdev | — | (415) 558 1507 | Electricians | San Francisco · San Francisco County | — | — |
| B & C Painting & Decorating | Barbara Jean Brooks | — | (415) 641 9100 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| B & J Construction Co | Nai On Yu | — | (415) 309 2868 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| B & M Construction LLC | Rauf Ibragimov | — | (650) 533 3997 | Electricians | San Francisco · San Francisco County | — | — |
| B & Q Construction | Bing Quan Li | info@bqconstruction.com | (415) 812 6648 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| B Birmingham INC | Bryan Michael Birmingham | bbirming@msn.com | (415) 806 2635 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| B C United Construction INC | Bing Jiang Chen | — | (415) 385 8992 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| B Coleman & Son | B Coleman & Son | — | (415) 863 7500 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| B D Maguire General Engineering | B D Maguire General Engineering | — | (415) 215 8066 | Other | San Francisco · San Francisco County | — | — |