| F C Paz Enterprises INC | Francisco Cruz Paz | — | (951) 742 8006 | Other | Riverside · Riverside County | — | — |
| F C's Plumbing | F C's Plumbing | — | (760) 404 7980 | Other | Cathedral City · Riverside County | — | — |
| F E C Construction | Fernando Miguel Gutierrez Vergara | — | (714) 936 8849 | GC, remodel, ADU | Corona · Riverside County | — | — |
| F E C O Electric Co | Felix Guillermo Lopez | — | (951) 340 9505 | Electricians | Corona · Riverside County | — | — |
| F F & A Construction INC | Franklin Alexander Chavarria Valdez | — | (760) 423 8090 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| F G Construction | Gonzales Freddie | — | (951) 445 8753 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| F G Ornamental Iron Works | F G Ornamental Iron Works | — | (951) 966 4355 | Other | Riverside · Riverside County | — | — |
| F G Paint Services | Martinez Herrera Celia | — | (760) 902 4326 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| F G V General Costruction | F G V General Costruction | — | (951) 858 3027 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| F H Construction | Huerta Fabian | — | (951) 229 5708 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| F H G Construction | Charles Steven Bigelow | — | (951) 526 7449 | Electricians | Murrieta · Riverside County | — | — |
| F H International Service Station Maintenance INC | Frank Contreras | — | (562) 220 2652 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| F J P Plumbing | F J P Plumbing | — | (951) 833 0325 | Other | Corona · Riverside County | — | — |
| F J Painting | F J Painting | — | (760) 404 2414 | Windows, patio, painters | Indio · Riverside County | — | — |
| F M Landscape & Masonry | F M Landscape & Masonry | — | (951) 689 3214 | Windows, patio, painters | Riverside · Riverside County | — | — |
| F M Lock & Safe INC | Steve Earl Koehn | — | (951) 929 4249 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| F M Pool Construction INC | Juan Francisco Carrillo | — | (909) 631 6815 | Pool | Jurupa Valley · Riverside County | — | — |
| F M United Grading INC | Nayeli Isamar Sanchez | — | (951) 300 7909 | Other | Jurupa Valley · Riverside County | — | — |
| F M Welding | F M Welding | — | (562) 209 1244 | Other | Corona · Riverside County | — | — |
| F Ns Electrical Contractor | Gerardo Rios | — | (760) 620 9205 | Electricians | Desert Hot Springs · Riverside County | — | — |
| F P Contracting INC | Eric John Querin | info@fpcontracting.com | (951) 894 7244 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| F P D Services INC DBA Stoker Pools | Tara Lynn Stoker | — | (760) 772 1111 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| F Q Construction | Quillahauquy Fernando | — | (760) 409 0830 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| F R Electric | Rodriguez Francisco | — | (951) 312 5646 | Electricians | Riverside · Riverside County | — | — |
| F R Lee Construction | Franklin Richard Jr Lee | — | (951) 312 4607 | GC, remodel, ADU | Homeland · Riverside County | — | — |
| F R Stencil | F R Stencil | — | (951) 206 7073 | HVAC | Beaumont · Riverside County | — | — |
| F S Commercial Landscape INC | Gail John Wood | info@fslandscape.com | (951) 360 7070 | Windows, patio, painters | Riverside · Riverside County | — | — |
| F S H Enterprises INC DBA Enviroscape Constructors | Edward Ferrel | — | (951) 303 1038 | Windows, patio, painters | Temecula · Riverside County | — | — |
| F S Incorporated | Efrain Martinez | — | (951) 305 7092 | Electricians | Hemet · Riverside County | — | — |
| F S S Alarms INC | Thurza Ann Rodgers | — | (915) 272 2535 | Electricians | Corona · Riverside County | — | — |
| F S S Companies INC | Harold Jerome Rodgers | — | (951) 258 5670 | Electricians | Riverside · Riverside County | — | — |
| F T S Tree Service | Fernandez Rivera Fernando | — | (951) 742 2245 | Tree | Riverside · Riverside County | — | — |
| F&b Onsite Solutions INC | Francisco Perez-Lazcarro | — | (661) 227 5565 | Other | Moreno Valley · Riverside County | — | — |
| F-n-m Electric INC | Gastelum Miguel Valdez | — | (760) 989 9842 | Electricians | Coachella · Riverside County | — | — |
| F3 Building Services INC | Florian Frank Fajardo | — | (951) 526 3308 | Other roofers | Riverside · Riverside County | — | — |
| Fabian Bolanos | Fabian Bolanos | — | (951) 489 6851 | Other | Moreno Valley · Riverside County | — | — |
| Fabio's Pool Service | Arenzon Fabio | — | (951) 234 2866 | Pool | Murrieta · Riverside County | — | — |
| Facilities HVAC Services INC | Del Toro Sonia | — | (818) 568 8680 | HVAC | Riverside · Riverside County | — | — |
| Faf Builders Corp | Saravia Floy Miramontes | — | (562) 204 5337 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Fairprice Enterprises INC DBA Fair Price Carpets | Marlene Margaret Ritz | — | (951) 684 8578 | Other | Riverside · Riverside County | — | — |