| #1 Honest Plumber INC | Edward Elesyado Hinojosa | — | (650) 422 4736 | Other | Sunnyvale · Santa Clara County | — | — |
| #1 Pro Elec Jmg INC | Junghoon Song | — | (408) 712 6690 | Electricians | San Jose · Santa Clara County | — | — |
| 1 Earth Landscape & Construction | Robert Pena Cruz | — | (408) 218 5752 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| 1 Haro 1 LLC | Ruben Terriquez | — | (408) 464 4564 | HVAC | San Jose · Santa Clara County | — | — |
| 1 Hour Drain Hotshot Restoration | Robert John Gallaher | — | (408) 825 1362 | HVAC | San Jose · Santa Clara County | — | — |
| 1-800 Water Damage Of West San Jose And Sunnvale | Bahram Nosrati Shamlou | — | (408) 859 5559 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 10 Star Electric | Jose Luis Arana | — | (408) 807 5418 | Electricians | San Jose · Santa Clara County | — | — |
| 101 Builders INC | Antoinette Rose Schreder | — | (408) 842 3355 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| 101 Hauling Services | Abrahan Rodolfo Jaimes Duarte | — | (408) 874 5132 | Other | San Jose · Santa Clara County | — | — |
| 101 Landscape & Design INC | Seung In Hwang | — | (408) 269 0101 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| 10X Painting INC | Juan Carlos Magana | — | (650) 269 2316 | Windows, patio, painters | Sunnyvale · Santa Clara County | — | — |
| 11 Concrete And Paving INC | Apodaca Gerardo Burgos | — | (408) 690 4619 | Other | Milpitas · Santa Clara County | — | — |
| 1153 San Rafael LLC | Najjarian Raman | — | (408) 712 4692 | HVAC | San Jose · Santa Clara County | — | — |
| 1stopbuilders | Aram Harutyunyan | — | (408) 666 4540 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| 2 Homes INC | Nghia Chinh Nguyen | — | (408) 786 4221 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 2001 Construction Group | Eduardo Max Garaycochea | — | (408) 371 2006 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 2001 Security System And Electrical Works | Joseph Anthony Franco | — | (408) 639 2001 | Electricians | San Jose · Santa Clara County | — | — |
| 2020 Heating & Air INC | Silvia Eufrosina Olivares Montiel | — | (408) 661 9138 | HVAC | San Jose · Santa Clara County | — | — |
| 24 / 7 Concrete INC | Pintos Nathan | — | (408) 426 6169 | Other | San Jose · Santa Clara County | — | — |
| 24/7 Concrete Solutions | Nathan Pintos | — | (408) 426 6169 | Other | San Jose · Santa Clara County | — | — |
| 24/7 Fire Alarm Services INC | Sidney Wade Davis | — | (888) 997 9958 | Electricians | Santa Clara · Santa Clara County | — | — |
| 24hr Drainpro Plumbing | 24hr Drainpro Plumbing | — | (408) 621 0067 | Other | Santa Clara · Santa Clara County | — | — |
| 2M Drywall INC | Gomez Miguel Mendoza | — | (408) 836 6684 | Other | Santa Clara · Santa Clara County | — | — |
| 3 Star Construction INC | Erick Guzman Vasquez | — | (408) 334 8675 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 3-k Roofing INC | Jesus Manuel Murguia | — | (408) 592 0939 | Other roofers | San Jose · Santa Clara County | — | — |
| 3D Electric | Domingo John | — | (408) 834 2953 | Electricians | San Jose · Santa Clara County | — | — |
| 3M General Services | Minh Quang Nguyen | — | (408) 472 9395 | HVAC | San Jose · Santa Clara County | — | — |
| 3mp Builders INC | Padilla Miguel Perez | — | (408) 314 8810 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 3rd Generation Building And Design | 3rd Generation Building And Design | — | (408) 834 2318 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 3serg Homebuilder INC | Alvaro Martinez | — | (408) 592 1792 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 4 Corners Flooring INC | Jurasek Srecko | — | (408) 781 8718 | Other | Campbell · Santa Clara County | — | — |
| 4 Point Electric | Louis Vincent Herrera | — | (408) 331 7617 | Electricians | Milpitas · Santa Clara County | — | — |
| 408 Builders INC | Inderjeet Singh | — | (408) 609 1643 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 408 Electric | Shawn Aaron Moore | — | (408) 688 6840 | Electricians | San Jose · Santa Clara County | — | — |
| 408 Real Estate | 408 Real Estate | — | (408) 316 5954 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| 4th Dimension Painting | 4th Dimension Painting | — | (209) 496 7422 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| 5 Brothers Best Construction INC | Gonzalo Quiroz | — | (408) 859 2320 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| 54 Electric INC | John Robert Brian Pfeiffer | — | (650) 489 5454 | Electricians | Mountain View · Santa Clara County | — | — |
| 5B Construction | Tung Ba Nguyen | — | (408) 835 5879 | Electricians | San Jose · Santa Clara County | — | — |
| 65 Construction | Antonio Chavez Carrillo | — | (408) 515 6458 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |