| Inland Valley Concrete | Inland Valley Concrete | — | (951) 660 0093 | Other | Moreno Valley · Riverside County | — | — |
| Inland Valley Electric | Olinsser Misael Valdivia | info@latinotype.com | (951) 809 1412 | Electricians | Moreno Valley · Riverside County | — | — |
| Inland Valley Engineering INC | Brian Harreld Aanestad | — | (951) 303 8309 | Other | Temecula · Riverside County | — | — |
| Inland Valley General Engineering LLC | Armand Keith Jr Archibek | — | (951) 294 1854 | Other | Menifee · Riverside County | — | — |
| Inland Valley Mechanical INC | Ashlan Alyxandria Parker | — | (951) 461 0147 | HVAC | Murrieta · Riverside County | — | — |
| Inland Valley Pipeline INC | Jaime Allen Bahr | — | (951) 368 3903 | Other | Temecula · Riverside County | — | — |
| Inland Valley Plumbing | Inland Valley Plumbing | — | (951) 692 0269 | Other | Hemet · Riverside County | — | — |
| Inland's Best Home Improvements & Handyman Service | Jon Paul Sr Portillo | — | (951) 858 0396 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Inline Drain & Plumbing | Juan Carlos Aguilar Pimentel | — | (760) 587 9131 | Other | Menifee · Riverside County | — | — |
| Inner Peace Plumbing INC | Robert James Moll | — | (951) 805 6207 | Other | Canyon Lake · Riverside County | — | — |
| Innerline Engineering INC | Bryce John Swanson | — | (800) 209 0000 | Other | Murrieta · Riverside County | — | — |
| Innov8 Technologies | David Alejandro Diaz | — | (951) 888 0007 | Electricians | Riverside · Riverside County | — | — |
| Innova Hardwood | Uribe Misael Mendoza | — | (619) 259 4365 | Other | Murrieta · Riverside County | — | — |
| Innova Outdoors Design & Landscape | Marco Antonio Enriquez Moreno | — | (442) 666 5457 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Innova Outdoors Group | Casillas German | — | (760) 834 8674 | Other | La Quinta · Riverside County | — | — |
| Innova Pro Painting | Innova Pro Painting | — | (619) 362 6422 | Windows, patio, painters | Temecula · Riverside County | — | — |
| Innovare Drywall | Rios David Perez | — | (760) 609 1764 | Other | La Quinta · Riverside County | — | — |
| Innovate Adu LLC | Jacob Lee Runchey | — | (951) 733 3224 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Innovate Desert Renovation | Innovate Desert Renovation | — | (760) 799 4495 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Innovated Acoustics Corp | Juan Carlos Hernandez | — | (951) 634 2888 | Other | Riverside · Riverside County | — | — |
| Innovated General Construction | Gerardo Salcedo | — | (951) 580 8530 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Innovated Landscape Construction | Oscar Antonio Alanis | — | (619) 955 2416 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Innovation Cabinetry Installs | Innovation Cabinetry Installs | — | (909) 545 4322 | Other | Beaumont · Riverside County | — | — |
| Innovation Constructors | Don Ray Edler | — | (951) 709 6277 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Innovation Group DBA Innovation Builders | Elvira Kennedy | — | (951) 703 9864 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Innovation Kurbs Landscape Designs INC | Yvonne Aida Molina | — | (909) 816 4152 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Innovation Landscaping & Pools INC | Lopez Bryan Valdez | — | (951) 992 8405 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Innovations Concrete ConstructionProtected | Garcia Enrique | — | (951) 355 3566 | Tile roofers | Menifee · Riverside County | — | — |
| Innovative | John Herbert Johns | — | (909) 287 7900 | Other | Riverside · Riverside County | — | — |
| Innovative Construction | Isaiah Vincent Torres | — | (951) 492 1487 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Innovative Construction Consulting Services | Sean Eugene Gill | — | (951) 532 6483 | Windows, patio, painters | Norco · Riverside County | — | — |
| Innovative Construction Designs | Gregory Alan Sparks | — | (951) 455 9518 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Innovative Desert Framing INC | Oscar Pacheco Nolasco | — | (760) 238 3395 | Other | Coachella · Riverside County | — | — |
| Innovative Designs | Innovative Designs | — | (951) 538 4610 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Innovative Electric & Communications INC | Andrew Jesus Rodriguez | — | (562) 714 1397 | Electricians | Temecula · Riverside County | — | — |
| Innovative Electric Services Inc. | Innovative Electric Services Inc. | — | (951) 776-0758 | Electricians | Riverside · Riverside County | — | — |
| Innovative Growth Landscape | Jerry Manuel Mata | — | (951) 293 1547 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Innovative Home Energy Solutions | Innovative Home Energy Solutions | — | (858) 837 3267 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Innovative Home Improvements INC | Bernie Zackery Vasquez | — | (951) 750 4050 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Innovative Landscapes INC | Ronald Thomas Krause | — | (951) 294 2043 | Windows, patio, painters | Temecula · Riverside County | — | — |