| Freeway Mechanical | Freeway Mechanical | info@freewaymechanical.com | (510) 280 4171 | HVAC | Concord · Contra Costa County | — | — |
| Freitas Landscape And Maintenance | Freitas Landscape And Maintenance | — | (510) 224 0695 | Windows, patio, painters | Pinole · Contra Costa County | — | — |
| French Pro Remodeling | French Pro Remodeling | — | (510) 309 9094 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Freschi Air Systems LLC | Dominic Joseph Freschi | — | (469) 724 7648 | HVAC | Concord · Contra Costa County | — | — |
| Friedman Construction Consulting | Joseph Allen Friedman | — | (510) 715 6509 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Friend And Terry Builders | Friend And Terry Builders | — | (925) 890 9444 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Friendly Fire Systems INC | Benito Jesus Jr Holguin | info@friendlyfiresystems.com | (888) 345 8889 | Other | Oakley · Contra Costa County | — | — |
| Frisby Construction | Aiden Martin Frisby | — | (650) 660 3139 | GC, remodel, ADU | Clayton · Contra Costa County | — | — |
| Frontline Electrical Services | Frontline Electrical Services | — | (800) 945-0268 | Electricians | Walnut Creek · Contra Costa County | — | — |
| Frontline Fire | Frontline Fire | — | (925) 848 5913 | Other | Brentwood · Contra Costa County | — | — |
| Frontline Fire Protection | Frontline Fire Protection | — | (925) 303 8962 | Other | Knightsen · Contra Costa County | — | — |
| Frontline Properties | Ifeoma Mbanugo Adams | — | (510) 693 5015 | GC, remodel, ADU | Hercules · Contra Costa County | — | — |
| Frost Environmental Abatement | Blaine Robert Frost | — | (510) 376 9783 | Other | San Ramon · Contra Costa County | — | — |
| Frumenti Construction INC | Joseph P Frumenti | — | (925) 260 4366 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| Fts Fireplace Technician Services | Marvin Alexis Lopez | — | (510) 295 3446 | Other | Brentwood · Contra Costa County | — | — |
| Fuel Tech Support INC | Amir Ashgan Tarbyatjoui | — | (510) 754 3216 | Other | Pleasant Hill · Contra Costa County | — | — |
| Fuentes Drywall | Fuentes Drywall | fuentesdrywall1@gmail.com | (530) 315-6147 | Other | Richmond · Contra Costa County | — | — |
| Fuentes Elite Construction Corp | Abraham Ivan Fuentes | — | (408) 550 4185 | Other | Brentwood · Contra Costa County | — | — |
| Full Bloom Landscaping | Full Bloom Landscaping | — | (925) 687 1375 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Full House Remodeling | Full House Remodeling | — | (925) 812 1723 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Full Spectrum Technology Group | James Anders Mendell | — | (925) 815 8324 | Electricians | Concord · Contra Costa County | — | — |
| Full Steam Ahead Construction & Plumbing | Timothy Andrew Bulyszyn | — | (925) 695 0016 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Functional Floors | Functional Floors | — | (925) 766 2877 | Other | Danville · Contra Costa County | — | — |
| Furlong Electric & Integration | Patrick Michael Furlong | — | (925) 625 2005 | Electricians | Oakley · Contra Costa County | — | — |
| Future Landscape | Future Landscape | — | (925) 260 6235 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Fw-jy Shieh | Fw-jy Shieh | — | (510) 381 0022 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| G & E Construction And Handyman Services | Jeremy Paul Davidson | — | (925) 207 2993 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| G & G General Construction INC | Julio A Garcia Gonzales | — | (510) 778 2033 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| G & M Landscape Services INC | Gilberto Cruz Toscano | — | (925) 212 1608 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| G & S Construction | Michael Gary Graves | — | (925) 679 2264 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| G & S Paving INC | Rodney Gus Stanley | gnspave@pacbell.net | (925) 625 6707 | Other | Brentwood · Contra Costa County | — | — |
| G A Capelli Construction | Glen Allen Capelli | — | (925) 303 3668 | GC, remodel, ADU | Discovery Bay · Contra Costa County | — | — |
| G A Pro Gutters | G A Pro Gutters | — | (925) 405 2156 | Other | Pacheco · Contra Costa County | — | — |
| G A Seismic & Retrofitting Construction | Alvaro Francisco Bonilla | — | (510) 837 0661 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| G Bay Pro Construction | Juarez Garibay Gilberto | — | (415) 571 9013 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| G C B Construction INC | Gino Joseph Jr Bartalotti | — | (415) 726 8881 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| G E Electric | Enriquez Guillermo | — | (925) 435 2361 | Electricians | Brentwood · Contra Costa County | — | — |
| G E T Electric | Gary Edward Toland | — | (925) 788 8182 | Electricians | Walnut Creek · Contra Costa County | — | — |
| G Electric INC | Dario Blazevic | — | (510) 329 5386 | Electricians | Walnut Creek · Contra Costa County | — | — |
| G Ferrabee Company Incorporated | Stephen Frederic Wolking | — | (925) 939 0422 | Other | Concord · Contra Costa County | — | — |