| Quality Construction | Phillip Patrick Indihar | — | (408) 263 7881 | GC, remodel, ADU | Milpitas · Santa Clara County | — | — |
| Quality Construction | Van Thu Quoc Tran | — | (408) 391 2120 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quality Contractor | Quality Contractor | — | (408) 458 6651 | Electricians | San Jose · Santa Clara County | — | — |
| Quality Epj Construction INC | Pedro Garcia-Villa | — | (408) 385 5592 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quality Fire Systems INC | Mensur Konkic | — | (408) 202 1511 | Other | Campbell · Santa Clara County | — | — |
| Quality First Services INC | Joel Michael Wallace | — | (408) 986 1233 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Quality Glass & Tinting | Quality Glass & Tinting | — | (408) 249-1566 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| Quality Glazing Solutions | Quality Glazing Solutions | info@qualityglazingsolutions.com | (408) 791 5765 | Windows, patio, painters | Milpitas · Santa Clara County | — | — |
| Quality Low Voltage Systems INC | Bonilla Neftali | — | (408) 274 0400 | Other | San Jose · Santa Clara County | — | — |
| Quality Matters | Moreno Feliciano Rios | — | (408) 658 2132 | Other | Santa Clara · Santa Clara County | — | — |
| Quality Painting By John Cochell | Quality Painting By John Cochell | — | (408) 313 3891 | Windows, patio, painters | Sunnyvale · Santa Clara County | — | — |
| Quality Plus Plumbing | Quality Plus Plumbing | amkryukov@gmail.com | (408) 219 4655 | Other | Santa Clara · Santa Clara County | — | — |
| Quality Sunrooms | Jose Manuel Camacho Garcia | — | (623) 466 5971 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quality Tree Association | Quality Tree Association | — | (408) 509 0422 | Tree | San Jose · Santa Clara County | — | — |
| Quality Woodwork Installations | Quality Woodwork Installations | — | (669) 207 7764 | Other | San Jose · Santa Clara County | — | — |
| Qualtech Mechanical INC | James Trent Quittner | — | (408) 436 2020 | HVAC | San Jose · Santa Clara County | — | — |
| Qualtiy First Plumbing LLC | Robert Frank Zamaroni | — | (408) 968 1163 | Other | Gilroy · Santa Clara County | — | — |
| Quan's Electrical Co | Hien Quang Truong | — | (408) 529 0854 | HVAC | Cupertino · Santa Clara County | — | — |
| Quang Xuan Nguyen | Quang Xuan Nguyen | — | (408) 497 5199 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quanten Electrical Contractor INC | Jerry Alan Meyers | — | (408) 955 0768 | Electricians | San Jose · Santa Clara County | — | — |
| Quantum Electric | Sosa Cristina Sanchez | — | (408) 800 8948 | Electricians | San Jose · Santa Clara County | — | — |
| Quartz Construction | Yossi Liani | — | (408) 966 2704 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quenna Electric Corporation | Jason Anthony Ratliff | jratliff@quennaelectric.com | (408) 690 8450 | Electricians | San Jose · Santa Clara County | — | — |
| Questivty Cabling | Humayun Aziz Sohel | — | (408) 615 1781 | Other | Santa Clara · Santa Clara County | — | — |
| Quick And Clean Service INC | Rojas Eduardo Ayllon | — | (408) 903 6316 | Other | Santa Clara · Santa Clara County | — | — |
| Quick Heating Cooling | Prospero Cabrera | service@quickheatingcooling.com | (650) 333 5145 | HVAC | Sunnyvale · Santa Clara County | — | — |
| Quick HVAC Santa Clara | Quick HVAC Santa Clara | — | (408) 872-9284 | HVAC | Santa Clara · Santa Clara County | — | — |
| Quintal's Construction INC | Leandro Anselmo Quintal | — | (408) 422 3209 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Quintal's Granite & Marble INC | Elizabeth Marie Quintal | — | (408) 295 8233 | Other | San Jose · Santa Clara County | — | — |
| Quintero Bros INC | Isaiah Cesar Quintero | — | (408) 561 8148 | Other | Gilroy · Santa Clara County | — | — |
| Quiroz Concrete | Quiroz Concrete | quiroz@quirozconcrete.com | (845) 728-7159 | Other | San Jose · Santa Clara County | — | — |
| Quiroz Construction INC | Jose Socorro Quiroz | — | (408) 999 0881 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quyen Nim | Quyen Nim | — | (408) 460 2821 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Quynh Ngo | Quynh Ngo | qngo810@gmail.com | (408) 464 3845 | Electricians | San Jose · Santa Clara County | — | — |
| R & B Heating & Air Conditioning | Bejinez Ramiro | — | (408) 977 1401 | HVAC | New Almaden · Santa Clara County | — | — |
| R & C Construction | Charles Alfred Evans | — | (408) 391 4385 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| R & J Builders INC | Zhou Guoquan | — | (650) 504 5946 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| R & J Ironworks INC | Ramiro Chavez Fernandez | — | (408) 667 8913 | Other | San Jose · Santa Clara County | — | — |
| R & K Electric | Richard Henry Rodriguez | info@rkelectric.com | (408) 691 4771 | Electricians | San Jose · Santa Clara County | — | — |
| R & L Construction Management INC | Leonel Caro Parra | — | (408) 761 2465 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |