| Innovation Plumbing Services LLC | William Christopher Tomasetti | admin@innovationplumbingservices.ca | (800) 678 0770 | Other | Hughson · Stanislaus County | — | — |
| Innovative Custom Homes | Innovative Custom Homes | — | (650) 222 0440 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| Innovative Restorations | Innovative Restorations | — | (209) 484 5437 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Innovative Roofing Services INC | Narciso De Jesus Pena | — | (209) 564 6537 | Other roofers | Ceres · Stanislaus County | — | — |
| Innovative Shotlining INC | Jason Samuel Word | — | (209) 849 8021 | Other | Modesto · Stanislaus County | — | — |
| Inspiration Design Remodel | Inspiration Design Remodel | — | (209) 360 1830 | GC, remodel, ADU | Keyes · Stanislaus County | — | — |
| Insupro Insulation | Insupro Insulation | — | (209) 596 7781 | Other | Riverbank · Stanislaus County | — | — |
| Integrated Fire Protection INC | Ramirez Pablo | — | (209) 541 5637 | Other | Ceres · Stanislaus County | — | — |
| Integrity Air Conditioning And Heating INC | David Reed Doubledee | — | (209) 322 3295 | HVAC | Oakdale · Stanislaus County | — | — |
| Integrity Construction And Remodeling LLC | Michael Anthony Jr Borrero | — | (209) 779 0904 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Integrity Drywall INC | Cesar-Alonso Recendez | interested@domainmarket.com | (209) 779 7498 | Other | Modesto · Stanislaus County | — | — |
| Integrity Quality Painting | Integrity Quality Painting | — | (209) 985 4075 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Integrity Shower Doors & Custom Glass | Michael Brandon Mckinnon | — | (925) 667 1641 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| Intelliguard Security INC | Sargon Henry Younan | — | (855) 345 7233 | Alarm and generators | Modesto · Stanislaus County | — | — |
| Intellisite LLC | Jorge Campos | — | (209) 315 5900 | Other | Ceres · Stanislaus County | — | — |
| Interior Wood Specialties INC | Mark Edward Cordrey | eben@eyebytes.com | (209) 896 7010 | Other | Modesto · Stanislaus County | — | — |
| Interspace Marble Countertops | Interspace Marble Countertops | — | (209) 968 8154 | Other | Modesto · Stanislaus County | — | — |
| Interstate Electric | Brett Lane Russell | — | (209) 493 7890 | Electricians | Oakdale · Stanislaus County | — | — |
| Inventive Resources INC | John Angelo Paoluccio | — | (209) 545 1663 | GC, remodel, ADU | Salida · Stanislaus County | — | — |
| Ioan Muresan | Ioan Muresan | — | (209) 652 0616 | Electricians | Modesto · Stanislaus County | — | — |
| Ipx Prefabricated Equipment | Maldonado Isaul Lopez | — | (408) 910 4368 | Other | Modesto · Stanislaus County | — | — |
| Iron Beard Painting | Iron Beard Painting | — | (209) 605 4502 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Ironstone Landscape | Abraham Navarro | — | (209) 581 2801 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| Israel's Clean Up | Israel's Clean Up | — | (209) 499 3194 | Other | Modesto · Stanislaus County | — | — |
| Ivan Ramirez Castillo | Ivan Ramirez Castillo | — | (209) 606 7173 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Ivy Construction | Michael Lee Ivy | — | (209) 247 9651 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| J & E Quality Floors INC | Jose Eduardo Echevarria | — | (209) 416 6730 | Other | Riverbank · Stanislaus County | — | — |
| J & H Construction INC | Juan Guadalupe Gutierrez Juarez | — | (530) 774 3955 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| J & K B Painting | Gerald William Bradford | — | (209) 604 7532 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| J & M Phillips Electrical & Plumbing INC | John Walter Jr Phillips | — | (209) 544 9922 | Electricians | Modesto · Stanislaus County | — | — |
| J & N Electric INC | Julio Cesar Acosta Camacho | — | (209) 360 1951 | Electricians | Modesto · Stanislaus County | — | — |
| J & R Builders INC | Juan Hernandez Gonzalez | — | (209) 602 6964 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| J & S Electric | Jim Ray Bienz | — | (209) 996 8000 | Electricians | Hughson · Stanislaus County | — | — |
| J & S Powers Plumbing | J & S Powers Plumbing | — | (209) 892 8721 | Other | Newman · Stanislaus County | — | — |
| J & W Gutters | Jason Dale Woods | — | (209) 681 7972 | Other | Modesto · Stanislaus County | — | — |
| J & Y Drywall INC | Alma Delia Mendez-Bautista | — | (209) 405 4109 | Other | Ceres · Stanislaus County | — | — |
| J A Bristow | J A Bristow | — | (510) 329 5034 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| J A C Builders INC | J Antonio Castellanos Bernaldez | — | (209) 632 3459 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| J A Doors | J A Doors | — | (650) 333 4315 | Other | Hughson · Stanislaus County | — | — |
| J A G Construction | Jose Manuel Avalos | — | (209) 564 2787 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |