| Infinite Networks INC | Sean Raymond-fran Betti | — | (408) 796 7735 | Electricians | Campbell · Santa Clara County | — | — |
| Infinium Solar Inc. | Jeff Manning Long | — | (408) 583 8101 | Other roofers | Campbell · Santa Clara County | — | — |
| Ingebretsen Victorian Painting | Ingebretsen Victorian Painting | — | (408) 377 1787 | Windows, patio, painters | Campbell · Santa Clara County | — | — |
| Ingenuity Construction Group | Edgar Ivan Fernandez | estimating@ingenuityconstructiongroup.com | (408) 495 2961 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Inline Tile | Inline Tile | — | (408) 857 8674 | Other | Morgan Hill · Santa Clara County | — | — |
| Inm Development | Inm Development | — | (650) 279 6665 | GC, remodel, ADU | Los Altos · Santa Clara County | — | — |
| Innate Home Automation | Jeremy Robert Prader | — | (408) 912 8811 | Other | Campbell · Santa Clara County | — | — |
| Innerspace | Linda Hale Bruce | — | (408) 980 8020 | Other | Santa Clara · Santa Clara County | — | — |
| Innomation | Lawrence William Toombs | — | (408) 839 6098 | Electricians | Morgan Hill · Santa Clara County | — | — |
| Innopowerline INC | Nhut Minh Vu | — | (408) 665 5379 | Electricians | Campbell · Santa Clara County | — | — |
| Innova Plumbing & Electrical | Ponce Abraham | — | (408) 835 1218 | Electricians | Sunnyvale · Santa Clara County | — | — |
| Innovate Construction | Meza Gonzalez Andres | — | (650) 771 6942 | GC, remodel, ADU | Mountain View · Santa Clara County | — | — |
| Innovate Engineering | Duran Charles | info@indiantypefoundry.com | (408) 898 9363 | Other | San Jose · Santa Clara County | — | — |
| Innovation Developers INC | Jose De Jesus Gonzalez | innovationdevelopers9@gmail.com | (708) 203 2942 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Innovation Heating & Air INC | Luis Vilchis | — | (408) 915 1394 | HVAC | San Jose · Santa Clara County | — | — |
| Innovation Outdoor Improvements INC | Alikssa Adilene Barragan Flores | — | (408) 832 7500 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Innovation Plumbing INC | Jose De Jesus Sanchez | innovation@charter.net | (408) 373 8165 | Other | San Jose · Santa Clara County | — | — |
| Innovation Tree Service | Bernardo Gabriel Garcia | — | (408) 608 5328 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Innovative Concrete Designs INC | Craig William Frandsen | — | (408) 288 9200 | Other | San Jose · Santa Clara County | — | — |
| Innovative Electrical Services | Arunesh Ashwindran Naidu | — | (510) 677 6444 | Electricians | Palo Alto · Santa Clara County | — | — |
| Innovative Precision Paving | Innovative Precision Paving | — | (650) 743 5197 | Other | Los Altos · Santa Clara County | — | — |
| Innovative Tile Concepts | Michael Patrick Hagan | — | (408) 371 8858 | Other | Campbell · Santa Clara County | — | — |
| Innovative Treecare LLC | Francisco Isaac Cardenas Delgado | — | (408) 836 1486 | Tree | San Jose · Santa Clara County | — | — |
| Innovo Builders INC | John Montoya | — | (650) 397 8868 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Inspiration Landscape INC | Darryl Motonari Furuya | info@inspirationlandscapeinc.com | (408) 272 8012 | Windows, patio, painters | Morgan Hill · Santa Clara County | — | — |
| Inspired Builders INC | Maayan Katav | — | (669) 800 9899 | GC, remodel, ADU | Sunnyvale · Santa Clara County | — | — |
| Install Cont | Install Cont | — | (408) 591 1111 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Installation Plus | Installation Plus | — | (408) 750 6912 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Integrated Building Systems INC | Jaso Gregory | — | (408) 966 4562 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Integritas Technology INC | Juan Pablo Haro | — | (408) 800 2545 | Other | San Jose · Santa Clara County | — | — |
| Integrity Living Solutions INC | Tyrone Zorrilla | — | (408) 609 0403 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Integrity Windows & Doors LLC | Albert Manuel Correia | — | (408) 225 2600 | Windows, patio, painters | Gilroy · Santa Clara County | — | — |
| Intelibilt | Soheil Mohsen | — | (669) 338 7790 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Intelligent Choice Builders INC | Grace Anne Graylow | info@intelligentcb.com | (408) 403-5565 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Intellix Software INC DBA Intellix Design | Tilotamma Arora | — | (650) 283 0177 | GC, remodel, ADU | Los Altos · Santa Clara County | — | — |
| Intempus Maintenance And Construction INC | Michael Khesin | — | (408) 320 5509 | GC, remodel, ADU | Saratoga · Santa Clara County | — | — |
| Inter Top Painting INC | Jose Luis Mendoza Maravilla | intertoppainting@gmail.com | (408) 373 9665 | Windows, patio, painters | Morgan Hill · Santa Clara County | — | — |
| Interdecor INC | Brian Steven Toby | — | (408) 328 0678 | Other | Santa Clara · Santa Clara County | — | — |
| Interior Comfort HVAC | Interior Comfort HVAC | — | (408) 859 7793 | HVAC | Morgan Hill · Santa Clara County | — | — |
| Interior Door Replacement Co | Joshua Suge Tseng | — | (650) 938 6878 | Other | Santa Clara · Santa Clara County | — | — |