| Fontenoy Engineering | Aidan John O Sullivan | — | (415) 740 0268 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Force Development Company INC | Felim Vincent O'reilly | pf.nicolasforti@gmail.com | (415) 361 6190 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Forefront Licensing LLC | Ruben Roberto Fontes | — | (510) 663 1833 | Electricians | San Francisco · San Francisco County | — | — |
| Forester Construction | Levi Junhao Lin | — | (415) 819 9407 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Forever General Construction | Shiu Ming Wong | — | (415) 710 5421 | Electricians | San Francisco · San Francisco County | — | — |
| Forever Green Landscape | Forever Green Landscape | — | (415) 987 9292 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Forma Construction INC | Victor James Mezhvinsky | contact@sansoxygen.com | (415) 322 8702 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Fort Concrete Solutions LLC | Jose Guillermo Guardado Rivas | info@fortconcretesolutions.com | (415) 960 4795 | Other | San Francisco · San Francisco County | — | — |
| Fortified Formation INC | Jenni Goliman | — | (415) 320 9088 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Fortress Construction INC | William Waichi Luk | — | (415) 513 3987 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Forum Renovation Co INC | Gurovich Rafael | — | (415) 609 1366 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Fosco | Fergus Noel O'sullivan | — | (415) 754 8064 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Foundations R Us | Foundations R Us | — | (415) 307 5152 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Four Square | Four Square | — | (415) 244 3407 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Fox Construction | Sean Peter Fox | — | (415) 652 1795 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Foxtail Hill Windows & Doors INC | Vincent Michael Keehan | — | (415) 822 8494 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Foxtron Security INC | John Ma | info@foxtronsecurity.com | (415) 939 8232 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Francisco Mendoza Tree Service | Francisco Mendoza Tree Service | — | (510) 613-5055 | Tree | Oakland · San Francisco County | — | — |
| Franco Landscaping And Maintenance LLC | Franco Cruz Manuel | — | (415) 722 5698 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Frank J O'brien | Frank J O'brien | — | (415) 987 5903 | Electricians | San Francisco · San Francisco County | — | — |
| Frank Lok Yu Company | Frank Lok Fan Yu | — | (415) 218 7704 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Frank Mc Cann | Frank Mc Cann | mccanninspections@gmail.com | (415) 407 8909 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Frank Zip | Frank Zip | — | (415) 810 1945 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Franklin Electric | David Franklin Klingenfuss | — | (415) 792 2004 | Electricians | San Francisco · San Francisco County | — | — |
| Fred Gunsberg Painting | Fred Gunsberg Painting | — | (650) 784 3104 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Freddy Garcia Plumbing INC | Rodriguez Rouset Schwartzbart | — | (415) 238 4681 | Other | San Francisco · San Francisco County | — | — |
| Frederic Grasset Design Building | Frederic Grasset Design Building | — | (415) 309 0614 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Freehold Development | Freehold Development | — | (323) 333 0145 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Freight Train Refrigeration INC | Daniel A Leyva | — | (415) 794 2415 | HVAC | San Francisco · San Francisco County | — | — |
| Freitas Construction | Frank Edward Freitas | contact@freitasconstruction.com | (415) 377 6862 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Fresh Painting | Fresh Painting | — | (415) 230 9610 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Fresh Start Painting Sf INC | Estuardo Valentin Godinez Munoz | — | (415) 347 7689 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Friday Gardens | John James Keegan | hello@fridaygardens.com | (415) 525 7457 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Friendly Brush LLC | Mayra Del Rosario Nochez Sanchez | — | (415) 269 5081 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Friendly Plumber | Friendly Plumber | — | (415) 242 8818 | Other | San Francisco · San Francisco County | — | — |
| Friendly Plumbing LLC | Jeremy Lin Hosee | — | (628) 282 1991 | Other | San Francisco · San Francisco County | — | — |
| Frisco Bay Construction INC | Tomas Guillermo Lopez | — | (415) 879 0819 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Frisco Bay Homes LLC | Tomas Guillermo Lopez | — | (415) 619 4929 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Frisco Plumbing And Construction | Zulma Karina Cruz-Lopez | — | (415) 822 8735 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Frisco Pro Building Services INC | Milton Eric Rodriguez | — | (415) 324 8777 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |