| 4 S Air INC | Spencer Loster | — | (909) 576 6586 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| 4 S General Engineering INC | Jon Talmadge Stone | — | (951) 733 8888 | Other | Temecula · Riverside County | — | — |
| 4 Sayles Construction INC | Frederick Michael Sayles | — | (559) 203 4070 | GC, remodel, ADU | Oakhurst · Madera County | — | — |
| 4 Schoer Construction | Steven Paul Schoer | — | (916) 826 8218 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| 4 Season Air | 4 Season Air | — | (818) 482 3277 | HVAC | Sylmar · Los Angeles County | — | — |
| 4 Season Land Care | 4 Season Land Care | — | (510) 461 5159 | Windows, patio, painters | Newark · Alameda County | — | — |
| 4 Season Landscape | Thanh Nguyen | — | (916) 621 7801 | Windows, patio, painters | Elk Grove · Sacramento County | — | — |
| 4 Seasons Builder | Montenegro Nacxil Orozco | — | (323) 802 5054 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| 4 Seasons Concrete INC | Asikati Lata I Muli Satui | — | (916) 370 0985 | Other | Gardena · Los Angeles County | — | — |
| 4 Seasons Construction & Design | Pirayesh Touraj | — | (818) 468 8244 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| 4 Seasons Construction Services | Thomas Russell Allison | — | (916) 832 9449 | GC, remodel, ADU | Roseville · Placer County | — | — |
| 4 Seasons HVAC | 4 Seasons HVAC | — | (626) 205 0911 | HVAC | Monrovia · Los Angeles County | — | — |
| 4 Seasons Painting | Todd Robert Groff | — | (530) 921 8406 | Windows, patio, painters | Redding · Shasta County | — | — |
| 4 Seasons Pools INC | Castillo Nuno Rene Del | — | (707) 803 1975 | Pool | Vacaville · Solano County | — | — |
| 4 Seasons Remodeling & Design INC | Amit Jacob Harel | — | (818) 516 7725 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| 4 Seasons Roofing | Jose Jr Alvarez | — | (818) 810 9987 | Other roofers | North Hills · Los Angeles County | — | — |
| 4 Seasons Roofing INC | Anibal Frias Cabral | — | (323) 726 9615 | Other roofers | Montebello · Los Angeles County | — | — |
| 4 Sons Concrete | 4 Sons Concrete | — | (925) 488 7757 | Other | San Ramon · Contra Costa County | — | — |
| 4 T Plumbing Co | Thomas Frederick Long | — | (951) 235 2648 | Other | Riverside · Riverside County | — | — |
| 4 Triplett Construction Corporation | Clarence Ellington | — | (630) 930 2473 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| 4 U 2 Idol Landscape | 4 U 2 Idol Landscape | — | (619) 807 6516 | Windows, patio, painters | San Diego · San Diego County | — | — |
| 4 U S Renovation INC | Marshall Henry Dohoney | — | (858) 643 9088 | Other roofers | San Diego · San Diego County | — | — |
| 4 Vanz4 Build & D3sign | 4 Vanz4 Build & D3sign | — | (209) 204 8841 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| 4 Volt INC | Gharibian Alen | — | (925) 967 4602 | Electricians | Tujunga · Los Angeles County | — | — |
| 4 Waves Management LLC | Tony Michael Blakely | — | (213) 598 9720 | GC, remodel, ADU | Lakeview Terrace · Los Angeles County | — | — |
| 4 Way Pool Excavation INC | Alvarez Benjamin Ledezma | — | (760) 975 6334 | Pool | Escondido · San Diego County | — | — |
| 4 West Pipeline INC | Herrera Hernandez Roberto | — | (951) 244 0002 | Other | Canyon Lake · Riverside County | — | — |
| 4 Winds Mechanical INC | Cesaer Manuel Garcia | — | (916) 667 4112 | HVAC | Sacramento · Sacramento County | — | — |
| 4 Wr Contracting | Horacio R Woolcott | info@wrcontracting.com | (510) 910 1911 | GC, remodel, ADU | Piedmont · Alameda County | — | — |
| 4 X 4 Construction | Justin Thomas Foxworthy | — | (530) 305 4464 | GC, remodel, ADU | Foresthill · Placer County | — | — |
| 4 X 4 Studio | 4 X 4 Studio | csy@systempia.com | (909) 214 9459 | Electricians | Chino · San Bernardino County | — | — |
| 4 X 8 Construction INC | Vincent Joseph Posada | — | (619) 279 2941 | GC, remodel, ADU | Poway · San Diego County | — | — |
| 4-by Construction & Plastering INC | Byron Rene Sipaque | — | (310) 345 9396 | GC, remodel, ADU | Gardena · Los Angeles County | — | — |
| 4-ever's Painting INC | Ever Wilfredo Molina Maye | — | (415) 747 4518 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| 4-eveready Plumbing | 4-eveready Plumbing | — | (562) 477 3187 | Other | Bellflower · Los Angeles County | — | — |
| 4-life Plumbing INC | Nelson E Ceron Cuatro | — | (818) 942 5546 | Other | Panorama City · Los Angeles County | — | — |
| 4-mac | Tambriz Manuel Ambrocio | — | (415) 298 5546 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| 4-seasons Heating & Air Conditioning | Rodriguez Alexander | — | (510) 886 3112 | HVAC | Castro Valley · Alameda County | — | — |
| 4-u Construction INC | William Dean Slack | — | (323) 422 0643 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| 4.0 Electric INC | Matthew Mark Padilla | — | (951) 249 1176 | Electricians | Murrieta · Riverside County | — | — |