| Interior Glass INC | Michael Joseph Yates | brunar@interior-glass.com | (408) 277 0796 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Interior Systems & Service Co | Daniel Jon Blanchard | — | (408) 209 1064 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Interiors For Modern Living INC | Michael Dennis Palen | — | (650) 722 9884 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Interlocking Paver Specialist | Interlocking Paver Specialist | — | (408) 591 1806 | Other | San Jose · Santa Clara County | — | — |
| Interspace Builders INC | James Enhao Yu | info@interspacebuilders.com | (408) 718 9795 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Interstate Decisive Contractor-i D C | Rod Farsai | — | (408) 287 2000 | HVAC | San Jose · Santa Clara County | — | — |
| Interstate Fence Co INC | Steven Angelo Sordello | al@interstatefence.com | (408) 532 9700 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Intrigy | Timothy John Mc Nally | — | (408) 725 8308 | GC, remodel, ADU | Saratoga · Santa Clara County | — | — |
| Ipool Service & Repair | Michael Changil Shin | — | (408) 309 9988 | Pool | San Jose · Santa Clara County | — | — |
| Irbis Air Plumbing Electrical | Vadim Vyacheslavov Vechkanov | — | (669) 266 5464 | HVAC | San Jose · Santa Clara County | — | — |
| Iris Mechanical INC | Aleksei Valerievich Eremchuk | — | (619) 439 4331 | HVAC | Santa Clara · Santa Clara County | — | — |
| Irish Excavation | Sean Gerald O'donoghue | — | (408) 659 6136 | GC, remodel, ADU | Morgan Hill · Santa Clara County | — | — |
| Iron Construction INC | David Brian Edgar | — | (408) 282 1080 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Iron Electric INC | Zamora Leonardo Lopez | — | (408) 770 0477 | Electricians | Milpitas · Santa Clara County | — | — |
| Iron Key Electric | Robert Sada Samuel | — | (408) 891 0424 | Electricians | San Jose · Santa Clara County | — | — |
| Iron Roots Construction INC | Boris Ernesto Sr Rodriguez Silva | admin@ironrootsconstruction.com | (408) 469 0757 | GC, remodel, ADU | Saratoga · Santa Clara County | — | — |
| Ironclad Construction INC | Mario Gilberto Jr Martinez Cerna | — | (650) 468 5561 | GC, remodel, ADU | Mountain View · Santa Clara County | — | — |
| Irwin Construction Kitchen And Bath | Charles John Irwin | — | (408) 710 4350 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Irwin Wagner Construction INC | David Glenn Irwin | — | (408) 499 0076 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Is Bay Area Construction | Guadalupe Ivan Sanchez | — | (408) 461 0809 | GC, remodel, ADU | Cupertino · Santa Clara County | — | — |
| Is Concrete Construction | Jose Ismael Salazar | — | (408) 630 0611 | Other | Sunnyvale · Santa Clara County | — | — |
| Isabel Wong | Isabel Wong | — | (650) 475 8954 | GC, remodel, ADU | Los Altos · Santa Clara County | — | — |
| Isais Bay Area Construction INC | Roy Richard Isais | — | (408) 794 8781 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Isanti's Drywall INC | Jason Javier Lara Hernandez | — | (408) 772 2166 | Other | San Jose · Santa Clara County | — | — |
| Isidore Mfg Inc. DBA Twin Oaks Fencing | Gregory Alan Lewis | — | (408) 437 0337 | Other | San Jose · Santa Clara County | — | — |
| Island Heating & Air Conditioning | Island Heating & Air Conditioning | — | (408) 595 9655 | HVAC | San Jose · Santa Clara County | — | — |
| Islas Roofing INC | Luis Javier Islas | — | (408) 397 1155 | Other roofers | San Jose · Santa Clara County | — | — |
| Isver Landscaping | Toto Petra Nayeli Hernandez | — | (408) 705 8134 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| It Electric Pros | Tsikhiseli Irakli | — | (408) 225 8777 | Electricians | San Jose · Santa Clara County | — | — |
| It Management Corporation | Arman Eghbali | — | (408) 739 1100 | Other | Santa Clara · Santa Clara County | — | — |
| Italia 1 Construction | Evan Nielson Koutz | — | (408) 313 3756 | GC, remodel, ADU | Gilroy · Santa Clara County | — | — |
| Itech Solution | Itech Solution | — | (408) 832 8150 | Electricians | San Jose · Santa Clara County | — | — |
| Itek Contractors INC | Kolo Falakiko | — | (650) 518 4028 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Ivan Nikiforov | Ivan Nikiforov | — | (408) 505 9379 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Ivan Rivera | Ivan Rivera | — | (408) 564 3849 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Ivc Tile & Granite INC | Castro Ivan Visoso | — | (408) 910 0842 | Other | San Jose · Santa Clara County | — | — |
| Ivma Home Improvement General Contractor | Ivma Home Improvement General Contractor | — | (650) 218 5513 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Ivy General Construction | Hugo Heriberto Reyes Salas | — | (408) 990 5671 | GC, remodel, ADU | Santa Clara · Santa Clara County | — | — |
| Ixp LLC | Aaron Daniel Rogers | — | (650) 469 3377 | Electricians | Los Altos · Santa Clara County | — | — |
| Ixta Gardens INC | Ixta Jose | — | (408) 396 6467 | Windows, patio, painters | San Martin · Santa Clara County | — | — |